Scion XB Low Power

Today we have a Scion XB with a no power concern. In this video we use a scope to diagnose exhaust backpressure! I hope that you all enjoy!
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If you're looking for in cylinder training. Make sure to find out where Brandon Steckler is teaching.
Also, if you want to contact me privately. My email is: [e-mail]
The views and opinions expressed are in these videos are my own, and have not been reviewed or approved by my employer, and do not necessarily represent the views and opinions on my employer.

[@VoltageDropDiagnostics]

Check out my amazon affiliate link to help the channel: www.amazon.com/shop/voltagedropdiagnostics

[@hankemory5883]

you probably dont give a shit but if you're stoned like me during the covid times then you can watch pretty much all of the new movies on InstaFlixxer. I've been binge watching with my girlfriend for the last few months :)

[@billyyoder8171]

Thank you Patrick. Have a blessed and safe week to you and your family.

[@VoltageDropDiagnostics]

Thanks Billy! I hope that you all are staying safe as well.

[@billrimmer5596]

Very few channels I pretty much drop everything to watch a vid. I always learn something. I might have said this before, Logical Canuck has a very affordable pressure transducer build. That check that performed allowed uto check three critical items. 1. Fuel pressure 2. A/F sensor 3. Back pressure 4. Timing belt accuracy. Sweet. Thank u Pat!!!

[@VoltageDropDiagnostics]

Thanks Bill! I appreciate that! I have seen a couple of guys build their own pressure transducer. Have you? If so, how well does it work?

[@kurtkennedy5370]

Never thought about checking back pressure that way, Awesome video and thanks for the idea!!

[@VoltageDropDiagnostics]

Thanks Kurt!

[@lawsonthursfield6950]

Awesome video, many thanks for taking time to demonstrate. Had the privilege of doing Brandon stecklers course recently in the uk , so this helps keep the memory fresh . Stay safe and God bless

[@VoltageDropDiagnostics]

Its so cool that Brandon was able to have classes in the UK. I took a class of his here in the states and it truly changed my life. He is a great guy too!

[@BrianMann216]

Great job taking us along and using the scope. Stay safe as well!

[@VoltageDropDiagnostics]

Thanks Brian!

[@ThePracticalMechanic]

It took me proving several plugged cats with the wps before the office believed it as a reliable test. I use it on GM v6 engines all the time because it easier to take out a front plug than the O2 sensor. Nice video PJ.

[@VoltageDropDiagnostics]

Thanks Chad! I used to work for Saturn. Those GM cats always clogged up lol

[@ballejoreef4599]

slick way to check exh backpres. excellent diag skills. wish more techs were like u instead of throwing parts at it and hoping for the best.

[@VoltageDropDiagnostics]

Than you! I am glad that you liked the video!

[@andrewk778]

Always look forward to your videos. Thank you for sharing. Good luck to you.

[@VoltageDropDiagnostics]

Thanks Andrew! I appreciate that!

[@jwoeltje6949]

Great video

[@VoltageDropDiagnostics]

Thanks!

[@ovwok]

Thx PJ! Stay safe brother.

[@VoltageDropDiagnostics]

Thanks Mark! We are trying! Keep yourself safe as well.

[@wyattoneable]

Great stuff PJ.

[@VoltageDropDiagnostics]

Thanks Wyatt!

[@CubasAutomotive]

Looking good! I loved the HUGE grin when you mentioned staying true to your channel and using the scope. Lol. Yes! Pressure transducer would be the way to go for our areas!

[@crystal1484]

Great video! Using the scope to check back pressure that is a really good idea. Stay safe.

[@VoltageDropDiagnostics]

Thanks Sherwin! Keep yourself safe as well!

[@odishoodisho4904]

Great video thanks for sharing your knowledge

[@VoltageDropDiagnostics]

Thanks for watching!

[@jamesl197999]

Thank you your videos are appreciated stay safe.

[@VoltageDropDiagnostics]

Thanks! Keep yourself safe as well.

[@smms5056]

Working on 2015 scion xb, idle issue. Low rough idle 500rpm/high idle 1100rpm. Was playing with brake pedal and steering wheel after I . Reset idle with 2 on off ignition cycles, 3rd cycle started it. Emergency brake up, put in drive and let it relearn for 5 minutes. After it felt 👍. So I turned the wheel all the way to left and idle got stuck at 1000rpm... haha, before I had a really low idle when I turned it.all the way.. So I'm looking for my next direction for diagnosis. Anyways I'm Enjoying your vids while taking a break 👍 👍

[@VoltageDropDiagnostics]

Clean the throttle body. With that said. Don't be surprised if the RPMs raise when you're adding electrical load on the system.

[@smms5056]

@@VoltageDropDiagnostics 👍👍 Will do Thanks

[@rickcoleman8903]

Best of luck to you I've had many ups and downs in my life but I've always recovered hang in there better days to come.

[@VoltageDropDiagnostics]

I hear you! I just hope that those better days are sooner rather than later.

[@jgeorges3061]

PJ, always enjoyable to learn from ya brother. cheeeers

[@VoltageDropDiagnostics]

Thank you! I am glad that you like them.

[@benjaminlevi7792]

Good job

[@VoltageDropDiagnostics]

Thanks Ben

[@DylanRabier]

Great job PJ. Amazing how fast that went with the WPS500 😉 Thanks for sharing and stay safe 👍

[@VoltageDropDiagnostics]

Thanks Dylan! Keep yourself safe as well!

[@caliautotech21]

Nice video man! Very clear explanation! Hope it picks back up for ya brother!

[@VoltageDropDiagnostics]

I hope so to. I'm hoping that it picks up here sooner rather than later.

[@100Ronster]

Hang in there. During the market crash in the ate 80's I had a comeback and ended being -.2 that week, eventually things picked up again.

[@VoltageDropDiagnostics]

Man, That week must have been rough! But times like this make all of us stronger. Or at least I hope that it does!

[@joshuawood6588]

Great video. Wednesday busted my snap-on 400 psi hose while doing incylinder test on a single misfiring cylinder. So I used hose in pico kit from toyota had a bad valve and seat and only 40 psi running. The dealership I'm at in Dallas laid off all hourly techs and cut back hours for now. Hang in there brother.

[@VoltageDropDiagnostics]

I'm hanging. I am just hoping that by May we can start to get back to normal.

[@joshuawood6588]

@@VoltageDropDiagnostics Me too! I have a Venza I'm working on today cylinder misfire used Cody's probe last night and seen no vacuum in one cylinder during idle. Got ok to tear down this morning and found piston cracked and rod not connected piston doesnt move with crank pulley. Also had no holes in block. Going to remove pan next.

[@BruceAImighty808]

Aloha from Hawaii. Appreciate the videos and hang in there.

[@VoltageDropDiagnostics]

Thanks Bruce! Hope you're doing well!

[@JohnWick-bb9jl]

Especially on that setup, with the catalytic converter right on the exhaust manifold

[@1hlyGOD]

Great work

[@VoltageDropDiagnostics]

Thanks Drew!

[@danman9017]

thanks for sharing. i am a truck fleet tech working same place since 1979 and we still do are 40 hour

[@VoltageDropDiagnostics]

Im glad to hear that! This week I did pretty good. If you look in the background of this video youll see a prius that I had torn apart. It needed a head gasket that saved my week.

[@danman9017]

Voltage Drop Diagnostics lol that what are we doing lot of head job now,only problem is the rebuilt surplier are close down

[@frankdaniels4364]

I had a 3.8l Caravan that I used this technique on. Some of those are hard to get the O2 out of, that one pays 1.4h. A front facing plug was much easier. It had a 5psi restriction according to the scope readings. It was easy to print out and show the before and after measurements. Anyway, thanks for the video, great stuff!! I wish you and your family the best through this.

[@VoltageDropDiagnostics]

Frank, thats a great tip as far as printing it out to show the customer! I am going to start doing that.

[@frankdaniels4364]

@@VoltageDropDiagnostics I'm sure you know but you could use the rulers to get numbers to show on the printout

[@camdaman813]

I have the Toyota Rumion 2009 version of this car. Love it!

[@VoltageDropDiagnostics]

A Rumion? I never heard of one. Is it the same as an XB?

[@camdaman813]

@@VoltageDropDiagnostics It sure is. In the USA its called the XB. In Japan its called the Toyota Corolla Rumion and in Australia the Toyota Rukus. I live in The Bahamas and we drive on the left hand side, so my Rumion is the right drive hand version of the XB with a few slight changes. en.m.wikipedia.org/wiki/Toyota_Corolla_Rumion Hope things get better for you soon! And for everyone.

[@abraham01257]

Nice job as always. Yeah nice way to explain the wave form. Stay safe Pat I feel your pain on those reduce hours and less customer car s to work on ...✌🏾

[@VoltageDropDiagnostics]

Yeah! The lack of work while also being concerned about the health risks have taken a toll on me. Lets hope that this all gets handled soon.

[@billrimmer5596]

I have to check a Scion tomorrow. Now I am loaded for bear. Thank u for this super channel!!!!!

[@VoltageDropDiagnostics]

What was wrong with it?

[@billrimmer5596]

@@VoltageDropDiagnostics It hasn’t shown up yet. As soon as it does, I will use your diagnostic approach and report back!!

[@abisismael1343]

Very interresting ! Thanks

[@VoltageDropDiagnostics]

Thanks for watching!

[@steveharvey1876]

Thanks! Stay Well! Cheers!

[@VoltageDropDiagnostics]

Thanks for watching!

[@MrEvo07250]

Thanks for the video. Please keep showing us repairs with the pico scope. Never knew back pressure could be checked that way. Pico scope is a wonderful once learned how to use. Want to know myself. Only a few actually use it.

[@VoltageDropDiagnostics]

Thanks! I'll gladly make any video that I can using the picoscope!

[@IAMNOSLEEP]

Stay well & safe... Cheers.

[@VoltageDropDiagnostics]

Thanks! Keep yourself safe as well!

[@BARBELLS-AND-BUDS]

Do a small hole in the Cadillac converter. Check the pressure is another way

[@philh9238]

That’s the only thing I know about pressure transducers is a restricted exhaust and the cycles I don’t know intake valve problems yet or exhaust valve problemsI just started looking at these waveforms a week ago.

[@VoltageDropDiagnostics]

I have a video I believe on a corolla misfire that shows a bad head gasket between cylinders. It might be worth checking out.

[@DIYDaveOK]

Stay well, PJ!

[@VoltageDropDiagnostics]

Will do! Make sure that you're also staying safe!

[@DIYDaveOK]

@@VoltageDropDiagnostics My family is doing great, working/schooling remotely and healthy. Staying home and trying to wait this mess out!

[@michaelmenard8913]

i like how you used scope to show restriction. But could you have or have you used pressure reading from O2 sensors? For those without a pico?

[@VoltageDropDiagnostics]

Absolutely you could! This was just showing a different method. Its always good to have multiple "tools in your toolbox" for when that oxygen sensor wont come out of the pipe.

[@SuperMarioDiagnostics]

Great video Pat, thanks for sharing. Times are tough man, hang in there bud!

[@VoltageDropDiagnostics]

I'm hanging in! This week wasn't nearly as bad. Thankfully.

[@KennyKingBoy]

I have the same vehicle a 09, no codes, long term fuel trim, runs about 10-15% at highway speeds! Cruise control. I used to be able to get 29-31 on the highway, for some reason it dropped all the way down to 24-26 Any ideas on what to look for? Clean mass airflow sensor, air filters good, spark plugs are good, fuel pressure is good. No vacuum leaks. Car runs great no rough idle just high L fuel trims and lower mpg than I used to get. 197k miles

[@bikerbud3903]

Its always darkest before the dawn. It may not seem like it now, but soon , you are about to live in the most prosperous, peaceful period in time in human history. Too much to explain but you'll know what I mean soon!! Some shocking events are about to happen. All for the better.

[@VoltageDropDiagnostics]

I hope that you're right!

[@justinhayward5027]

Thermal imager would have given You the same results. Checking it while someone’s power braking it. And see the heat difference from the front of it and rear of it. If it’s a drastic difference you know it’s clogged. Good video man.

[@VoltageDropDiagnostics]

I need to get myself a thermal imager. With that said, not all catalytic converters can be diagnosed this way. Some cats are endothermic and some are exothermic.

[@fixgarage3209]

Hi thanks for this useful information.. Plz i need to know if this prusser transducers works with autel oscilloscope.. Thanks again

[@wagonkit]

wouldn't a clogged airfilter also cause a rich condition?

[@arthurfricchione8119]

Pat I wish you and family nothing but the best. These are really difficult times up here on LINY. Actually it sucks. Thanks for the video. I just took a Brian Mann Pico webinar course. He is an excellent instructor and person. I’m trying to support all you guys in these hard times. Thanks again and stay safe ❤️🙏 Brian did you disconnect the exhaust from the converter proving the converter bad? Just wasn’t clear in video what you actually separated. I probably just answered my own. Is converter that far forward. Thanks 😊

[@VoltageDropDiagnostics]

Yeah. The catalytic converter is part of the exhaust manifold. So I disconnected the front pipe from the manifold to see if the restriction was before or after the converter.

[@masongray9046]

Good work got to get that tool for my pico things art much better in Md. hang in there 🙏

[@VoltageDropDiagnostics]

Yeah. I have a couple friends who work in toyota dealerships in Maryland and a lot of them are being laid off down there.

[@duanedonaldson2262]

Unless I missed it, I didnt hear you say what your limit is for backpressure, maybe 3 PSI?? Why was the exhaust changed, did they say, was it for the same problem? Another great video. For readers here in the future if you believe you have a clogged exhaust system you can do the same procedure, disconnect the exhaust between the CAT and the muffler, if still a problem, disconnect forward of the CAT and it will clear up if the problem was a clogged exhaust. Beware of the possibility of breaking studs, lots of break free may not work.

[@VoltageDropDiagnostics]

My threshold is a little higher with in cylinder waveforms then when using a gauge. I usually say "under 5 psi" only because there be slight restrictions with valve opening.

[@weldingjunkie]

Great job PJ this one also made it to my wps training playlist. Is 2500 the sweet spot to see back pressure the best? Keep up the great work and stay safe

[@VoltageDropDiagnostics]

I'm not sure if it is the sweet spot. But after finding out that a snap throttle will give false results, I have been using this method with good success.

[@automotivediagramsreading9711]

Thank you for sharing your knowledge. One question, air fuel sensors work with different voltage as i can see, every manufcture uses it own. Is there any stragety that you use on toyota vehicles or all the readings are the same..thanks

[@VoltageDropDiagnostics]

You're right all manufacturers use a different voltage number. For example, Toyota is 3.3 volts. But keep in mind that A/F sensors don't work off of voltage. They actually work off of amperage. The voltage reading you're seeing in the scan tool is a substituted number. BUT if there is a lambda pid 1.0 is the standard for stoichiometric across the board for all makes and models. And anything lower than 1 is rich and anything above 1 is lean.

[@yemiasaolu1622]

Great vid PJ ,that awesome ,I want to ask ,can Autel scope put up a clean incylinder waveform or maybe u do a vid using Autel scope for incylinder waveform

[@VoltageDropDiagnostics]

The autel should be able to. The next time I get a car that needs in cylinder testing done I'll try to use the autel scope.

[@scuba422123]

hang in there pj…. im in n.y. and its getting a little crazy here I just got an n95 and I have glasses. but....I was missing only 9 hours work last week

[@VoltageDropDiagnostics]

How bad is it getting up there? I know what the media shows. But I am starting to have very little trust in any media. If you get a chance, I'd like to hear how it actually is for people living in the area.

[@scuba422123]

pj on long island n.y. a huge chunk are not working..all the gun shops sold out before they closed along with most places...except essential...including booze stores! 90 percent are wearing masks and gloves when they are out. so far most are staying home. we are not in lock down yet. .hospitals are full or near full. a lot of death mostly older people, its sad

[@shaunjudkins7192]

I have a 2005 scion xb and it runs strong in 1st 2nd and 3rd gear but once I get on the freeway in 4th gear at 4000 rpm it feels like it drops off in power, then I shift to 5th gear and it's good again until it come up to 4000 rpm again and it drops slight power again. Any thoughts, thank you

[@mansouralblooshi3004]

Thanks for sharing PJ. @ 7:30 which point of exhaust did u disconnect?

[@VoltageDropDiagnostics]

I should have explained that better. The catalytic converter is part of the exhaust manifold. So I was disconnecting the front pipe that connects to the manifold to isolate the manifold from the rest of the exhaust.

[@mansouralblooshi3004]

Ahaa thats more clear now. Thank buddy n stay safe.

[@TheWilferch]

Just asking.....would a clogged cat show up as one of the diagnostic codes without going through all that you did here?

[@VoltageDropDiagnostics]

Maybe if the vehicle was driven far enough it would set a code. But this particular vehicle didn't have a code set.

[@sonofmontezuma3732]

I hear that is one indestructible car the SCION XB HANG IN there things will improve sooner or later

[@VoltageDropDiagnostics]

Yeah, besides burning oil, these cars are pretty solid vehicles.

[@ottallman]

No doubt. My lady's parents borrowed her car and ran it low on oil. Checked it when they brought it back and dipstick was dry 😬 was almost 2 quarts low. They ran it 10k miles on an oil change also when they were suppose to get it changed. That was 80k miles ago. Car is a 2012 and just hit 235,000 miles. Never count out the scion xb and never loan the inlaws a vehicle. Lol

[@joshstaton508]

Heck man, make some more videos when y’all are slow. If anything just make some with some short ones with know goods and post the files. I know videos don’t make that much money but might help a little. 👍👍

[@VoltageDropDiagnostics]

I'll keep that in mind! Thanks for watching Josh.

[@HouseCallAutoRepair]

I want a transducer!!! And... Someone to teach me how to use it with my Verus. Pat?

[@VoltageDropDiagnostics]

Hm. You’d need to look into the ATS 500 psi transducer to use with the verus

[@HouseCallAutoRepair]

@@VoltageDropDiagnostics Will do. Thanks!

[@mouthbreathermtb4192]

Love the videos! You are making me better Toyota tech! Real quick though, is that Scion engine burning oil? I haven’t been able to prove it but I bet if it was it could clog the catalytic converter. Just curious

[@VoltageDropDiagnostics]

Oh yeah! It was burning tons of oil lol We didn't recommend just a catalytic converter. We recommended a reman engine because he was out of the extended warranty and also burning large amounts of oil.

[@mouthbreathermtb4192]

Voltage Drop Diagnostics Awesome! Long story short, my in-laws live 10 hours away from me. They drove a TC they had to add oil to every 2 weeks haha. One day they call me and tell me the car won’t go over 20 mph and maxed at 2500 rpms. My theory at the time was the cat was clogged with oil or it lost all of it’s compression. So thank you for posting this! I got real excited when I read the title! Keep up the great work! You should do online scope classes! I know myself and 2 others Toyota techs at my dealer would be pay for that.

[@hassanissa9741]

great video very fast diag can you give us some tips and tricks with tichstream ,it will be exlente to her from toyota tech master🙂🙂

[@VoltageDropDiagnostics]

Sure! I'll keep it in mind that people want to see more of techstream.

[@ozzstars_cars]

Hey PJ you mentioned the exhaust was replaced, post cat I assume? Did the Uber ride have any past history of running rich or internal coolant leak killing the cat?

[@VoltageDropDiagnostics]

Good question. It actually burnt large amount of oil I found out after I talked to him. I ended up recommending a reman engine.

[@smms5056]

🤙🤙👍👍

[@codysautodiagnosticsprogra8706]

Great video brother! Hang in there, we are all struggling right now and honestly this period is going to weed out some techs and shops, so we just need to hang in there.

[@VoltageDropDiagnostics]

I agree! If nothing else this virus is going to weed out the weak shop owners and techs. It might be beneficial for us all long term.

[@ivandrago2557]

Hello can you tell me why you didn'r suspect dirty maf sensor if had one

[@VoltageDropDiagnostics]

It appeared to be reading accurately.

[@ivandrago2557]

@@VoltageDropDiagnostics thank you love your videos

[@ivandrago2557]

@@VoltageDropDiagnostics If exhaust was clogged wouldn't be maf reading lower because of resctriction like Scanner Danner said if engine can't "exhale" it can't "inhale"

[@smms5056]

👍👍

[@VoltageDropDiagnostics]

Thanks!

[@mattbickford2640]

i know this is an older video, do you ever try to take out the top AF sensor and see if it runs better without it? or have you been burned by that before?

[@VoltageDropDiagnostics]

Oh yeah. For sure. But i always worry about the threads of the oxygen sensor/ air fuel sensor stripping out.

[@LT-nu9ud]

Help me I have a random multiple miss I have replaced every thing and it will not go away new coils new injectors plugs and maf fuel pump and ecm and harness all gaskets and hoses the motor is also a rebuilt engine with good compression and did a leak down WTF

[@PaulysAuto]

That thing was wasted 😂😂😂👍 Great use of the transducer when you don't want to heat the hell out of that upstream O2! What caused the meltdown of the CAT you think? Time to get back to work America! Stop this nonsensical shutdown before our economy tanks completely! Hang in there Pat, I'm praying for you and others out there trying to stay on top of it during this trash!

[@VoltageDropDiagnostics]

PAULY'S AUTO after talking to the customer, he told us that it was burning an astronomical amount of oil. 2-3 quarts every 1,000 miles. I have a feeling that was the cause of the cat failure.

[@PaulysAuto]

@@VoltageDropDiagnostics oh boy, yup that'll do it! Thanks for letting me know Pat, take care man!

[@ala2785]

hi i really like your video and i have question i was driving my 2006 Scion XP and everything was working fine I had the problem with radiator before I did not fix at that time and the battery light came on and the brakes and ABS light came on and check engine was on before and stayed on I change the battery the battery light did not go off stayed on and I made it home that night on the battery power only this is my little bit long sorry anyway I tried to check all the fuses all of them inside the car and the ones by the engine compartment all of them none of them was going off next morning I changed alternator radiator I did oil change on the way the battery light went off the only thing all the other lights stayed on I did not have AC I did not have the fan on all the time I was driving home so when I pulled up in the parking lot the temperature was high I tried to release the pressure from the radiator safely anyway after I changed all that I still have the odometer is not working it's not reading my speed the fan is not working I bypassed it temporarily trying to get help you could tell from what I described what could be the wrong is it the computer you think it went off

[@ala2785]

please thank you

[@avionism]

If you were to check the compression with a gauge ,what kind of reading would you expect to see with a clogged cat, Pat?

[@VoltageDropDiagnostics]

The same as you would without a compression gauge actually.

[@avionism]

interesting -Thanks

[@fnumasoud6516]

My Corolla 2008 has bad gas mileage it has 77000 mileage on it . Took it to Toyota they clean the fuel system no help and no warning light on dash need help

[@exshenanigan2333]

which state are you guys in?

[@VoltageDropDiagnostics]

Pennsylvania

[@djosbun]

Thanks for another great video, PJ. Can you please send me your email address? I would like to show my appreciation for teaching me valuable diagnostic techniques that allow me to keep my family's old vehicles running perfectly. I hope a token of my gratitude will help offset your dropoff of billable hours. I hope the family is doing well!

[@VoltageDropDiagnostics]

I appreciate it! But I can't accept that. I'll be fine. I always am! I do appreciate it though.

[@djosbun]

@@VoltageDropDiagnostics Please, PJ, I insist. Use it for your wife or your daughter. I am sure they're getting bored from spending too much time in the house. At the very least start up a Patreon account so your fans can support your videos every month. Or you'll force me to send it to Brandon so he can forward on to you! 😉

[@VoltageDropDiagnostics]

I promise, we will be fine. I turned in a couple vacation days for pay. And this week wasn't as bad. I do appreciate it. And I'm not sure how I feel about Patreon. I'm not doing this for the money. (Because let me tell you, KZbin isn't very generous hahah) I do this to try and help the industry.

[@richardcranium5839]

almost didnt need the rulers on that one pretty clear

[@VoltageDropDiagnostics]

haha Yeah. I agree completely.

[@Gaspak-bj1rx]

Bro literally said it didn’t make a difference with the cat off and still said it’s obvious it needs a new cat… you didn’t fix anything bud

[@daviddasilva4897]

Great video

[@VoltageDropDiagnostics]

Thanks for watching!