Scion TC misfire?!?!? P0303

Today we diagnose a tc that has a misfire. In this situation it was only the coilpack. Many times it goes beyond this basic issue. Thanks for watching!
Ig-@mcrib47

[@jonpascobillo]

Thanks for this video! Saved my tC. I did exactly as you did and my car running smooth again. I panicked a bit when it did start to misfire and I found this video.

[@McRib47]

Happy it helped!

[@hikesteepfishhigh]

needed to know the cylinder order. your video helped me out

[@hikesteepfishhigh]

i had figured out it was a cyl 4 misfire. but didnt know the cylinder order. your video save me alot of time and money. a new coil and 4 new plugs (bosch double iridium) once i figured out that it also had the original plugs!!! 190,000 on factory plugs!! my 2004 scion xa is purring again!!! time to clear the code and complete a drive cycle. thank you! much appreciated!

[@McRib47]

Glad I could help, awesome to hear you have your car up and running nice!

[@notebook92410]

Great DIY video bro.

[@McRib47]

Thank you so much!!!

[@reymisterio1918]

*_NICE & EASY EXPLAINED!_* 👌👌

[@McRib47]

appreciate it thanks for watching

[@VILLEGAS76able]

On Toyota when there past there 100,000 mile mark, most of the time it's the coil pack.

[@wicked6696]

If your check engine light blinking wile your driving it’s your modules but also don’t forget to change your plugs I’ve learn that on my own doing a diagnostic reading

[@McRib47]

Appreciate the input! I did my own field work car had a bad misfire and it is a common issue with this car since the coil packs are so cheap and wear so fast

[@sethsegura8680]

moduals ? do you mean ingnition coils ?

[@josh1667]

When I drive there’s amiss, the auto mechanic switched the first fuel injector to the second and it worked fine, he mentioned it was the computer that is faulty, because they fuel injector is fine and just not registering to release fuel into the engine...

[@williambrucesanders6878]

What computer? I have a xb . Can u help? Look at my vid plz

[@cannabisenthusiast8351]

McRib saved me

[@McRib47]

how did i save you?

[@user-zu2ze4vg9b]

Hey McRib47 i have a question about the wiring trying to figure out what the wire locations are on the second clip from the left. I can’t tell the color of the wires. So if you could let me know. Thank you

[@McRib47]

Hey super sorry for late reply, when this video was posted was a few years ago i no longer own the car. maybe you can look up a wiring diagram on google to figure out your issue

[@Andrew-hh3ol]

The fuel injectors are super common as a misfire fix in Toyota’s / scions

[@McRib47]

yeah, alot of stuff was made cheap on these scions. everything is brittle and breaks.

[@Andrew-hh3ol]

@@McRib47 not everything the biggest mechanical issue was the fuel injectors and connecting rod bearings with few oil changes in a well over 200,000 mile xa

[@hjkjccdggjhvb]

change all spark plug and ignition coil, car drove good for 700 miles and check engine light came back on. P0302. I swap engine coil and spark plugs and code keeps comming back saying p0302. After reading your comments i'm starting to think it's the fuel injector , what do u guys think ?

[@Andrew-hh3ol]

@@hjkjccdggjhvb get a fuel pressure gauge from Harbor freight test pressure at the rail and compare to the oem pressure spec before jumping into any injectors or intake gasket either that or get a tech 2 scan tool with live data to see how smoothly the injectors are firing and I think some have a fuel pressure sensor and will tell you the pressure and then see if you have a evap leak pressurize at the intake it could be something as stupid as a stuck PCV I had to replace a PCV in a few scions however don’t open the parts cannon until you know because evap leaks even if they get fixed will break repeatedly because of a stuck PCV etc over pressurizing the intake also get a contactless voltage tester $5> Ames at harbor freight and see if the coil is just not getting consistent power Toyotas,Hondas, and fords are known for having weak ignition coil connections at the connector I would test for the ignition coil connection/solenoid: intake leak before fuel pressure but if you’ve never done a fuel pump or filter it may be worth a stab

[@Andrew-hh3ol]

@@hjkjccdggjhvb the Innova CarScan Pro 5610 Will probably be the cheapest not Chinese junk that will give you the information you need to not be on a wild goose chase

[@DGSantaFe]

Very good video!!!! So my TC has a misfire like you showed. The code reader gave me a P302. I saw other videos n all said bad ignition coil. So I bought all four new and installed them. I scan it again and it gave me P0351, 352, 353 & 354. My car runs poorly now, what can it be? Any thoughts? Thanks!

[@koopsville]

Any luck?

[@hjkjccdggjhvb]

so did u fix it , mines doing the same , all new coil and sparks , and throwing P0302..

[@McRib47]

it did fix it , in the end of the video i show the cel light is gone and car is running good. i would see if you are leaking coolant into cylinder two. if you have a boroscope and radiator pressure tester. I had a car that had the same issue. it ended up leaking coolant into the combustion chamber causing misfire

[@twokickers]

Did you resolve the misfire on the scion? I don't see the updated video...thx

[@McRib47]

yes it did, it shows at the end that the check engine light is gone.

[@papparazzi79]

awesome TY

[@McRib47]

no worries happy to help you

[@johnrodriguez2072]

I have a question bro i need to contact you

[@latashamarie9833]

@mcrib47 was the issue the spark plug itself or the coil pack?

[@McRib47]

the issue was the coil pack

[@Matt-vb2jo]

I had a guy tell me the cylinder order was 1234 from drivers side that it always numbered like that. I have a cylinder 2 misfire on my scion tc (2006). Have you heard of this?

[@McRib47]

No it goes from the belt side. Like I described in the video

[@seanedwards94]

It's belt-side on the Xa as well, just to confirm

[@johnatonrivera968]

What if you change all of the ignition coils and sparkplugs and is still doing the misfiring

[@McRib47]

I would check valve clearances

[@McRib47]

And injectors

[@R_JAY_MAGIC]

My car cranks but no start...and when it do it only stays on for about 7 seconds then it will cut off

[@McRib47]

I would definitely check for vacuum leak and check fuel pressure. do a once over the car and see. If you can figure it out i would take it to a shop. or if is throwing a code go from there.

[@ManuelRamos-yu9nu]

What size tools do I need for the screws?

[@McRib47]

which screws? on the valve cover or coil plug? if so they are both 10mm

[@Big-tu2iv]

Have you had any problems with the wiring harness?

[@McRib47]

Nope I’ve never had any issues.

[@AlbertoGonzalez..]

Yes

[@djs_projects_repairs]

Lol you where saying how easily thos lil 10's will snap i was tightening my coil pack down on my 08 xb not paying attention and.. boom but rather than snaping the bolt I snapped part of the valve cover threads and all are stuck on the bolt which is now a part of the coil pack.. thank got my valve cover just came in today... I've been doing this too long and I made a huge rookie mistake smh..

[@McRib47]

It’s all good man! Just take your time installing your new valve cover!

[@djs_projects_repairs]

@@McRib47 planed on it appriceate you saying all good just sucks when I been doing this for 9 years then oops lol have a good one and great job on the video.

[@rubenacuna3188]

If replacing the spark plugs and cylinders don't fix the issue could that be the fuel injectors?

[@McRib47]

What’s the issue you are having? For me it was a coil pack

[@rubenacuna3188]

Cylinder #3 misfire I replace all the spark plugs and Cylinder # 3 it worked well for 2 weeks and the misfire on Cylinder # 3 came back is a 2016 scion tc

[@rubenacuna3188]

@@McRib47 what is the coil pack if you don't mind explaining to me I still having the same problem after replacing coil po 303 coil #3 and the carscaner says is permanent please help

[@McRib47]

@@rubenacuna3188 I would try injectors and if not it maybe that the car needs a valve adjustment

[@rubenacuna3188]

@@McRib47 yes that is my next step also it could be the harness but I will try injectors first is only 80,000 miles on the vehicle, thank you for the tip I really appreciate it

[@titocalderon07]

I’ve heard that the cylinder order is 1342?? Is that wrong ??

[@LOhateVE]

That's what I was told and found as well. You can test by purposely dissconnecting a known good one (not 1) to make sure.

[@JudyCrayCray]

you showed a P0302 not how your vid is tittled P0303, did not helped me for my code P0303 random misfire...

[@McRib47]

sorry about that, i didnt catch that. i would recommend checking the coilpacks or spark plugs as i did in the video.

[@UndefinedStasis]

Whenever you get a misfire on a tc it is always the coil pack no matter what. I've had a PO303, 2 coil packs were bad

[@McRib47]

@@UndefinedStasis yeah they are cheaply made!

[@UndefinedStasis]

@@McRib47 in 40k miles I've changed 6 of them, granted 2 of them were really cheap ones I found online but the others were oem Denso.

[@jacobbigdong7602]

Again

[@McRib47]

What do you mean

[@jacobbigdong7602]

Nothing I was just fucking around. Thank you very much though I do appreciate the help🎉

[@McRib47]

@@jacobbigdong7602 im happy it helped you