Chevy Truck - P069E, P0172, P0174 - Running Rich FPCM Trouble - The Fix

In part one of this series ( • Chevy Truck - P069E, P... ) we diagnosed this Chevy Silverado that had a rich running condition and we determined that the Fuel Pump Control Module was to blame. In this installment of the SMA show we will replace that module ( FPCM ) and reflash it. Also some bonus footage from Mrs.O as she shows us "Lifehack #1"
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THANKS!
--Eric O.
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Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair.

[@robertwhite6203]

I’ve watched a lot of Eric,s videos & I must say he is one heck of a tech ! One of the best at his craft . We need more techs like him ! I’ve gained a lot by watching . He is the wizard at auto repairs . Vechicles now days are so complex anymore unless you have the right tools to the repairs . Tools can get $$$$$ as we all know .he does have a good sense humor too ! He really is a great educator !

[@ScottStairs]

I own a small shop, and I love your videos. I resource them all the time when I get stuck. I have learned a ton by watching. Thank you so much!

[@willieweber8500]

Eric you do the best job explaining and relating to the problem. I’m Willie a DOT,GSE tech with Fed ex at MSP in Minneapolis. Keep up the great work!!

[@danielvaldezaguirre]

Cheesy Intro FTW! Repair and Video production like a BOSS! thanks for your dedication you put into these videos man!

[@SouthMainAuto]

Skip ahead, I thought we discussed this!

[@danielvaldezaguirre]

LOL! I am starting to like the first 30 seconds of melted cheddar and mozzarella!

[@SouthMainAuto]

It will grow on you trust me...u will be in love in no time playing it on a loop

[@nomanjones4803]

The more they overthink the plumbing, the easier it is to plug up the drain.

[@ashoppa]

Another great day started with a SMA video! Thank you for so much knowledge and entertainment

[@maxellus1945]

Love your stuff Eric O, I have learned a tremendous amount from you. Great editing and yes I do know how much time goes into this side of things. Agree with your comment at the end re complexity etc. But you are correct we must move with the times, even though I sometimes long for the days when the biggest issue with a Chevy truck fuel pump exchange was trying to keep the pushrod from falling out of the block, yes I'm an old guy!Thanks again.

[@gzoie]

great video !!! u r a brave man Dr. O !!! talking smack to Mrs. O with a hammer in her hand !!!!

[@ozzstars_cars]

The surgery was a success, good work Dr. Eric O.

[@SouthMainAuto]

Yes it is alive and well

[@02lowrider62]

What a true statement getting more difficult by the day, I spend more time reading and learning then I ever had, it is a changing world. And when customers walk in the door they expect you to know what is going on. Always got to stay sharp!!!

[@Pnormandin13]

Mrs O had the best tip! she needs her own channel :)

[@theoldwizard998]

The funny black plug on the back of the module is actually a vent so that any excess pressure won't blow out the seal between the edge of the circuit board and the housing.

[@seanovens8422]

I sure appreciate and enjoy your videos. You're a good mechanic. Thanks

[@cent31119]

That Bosch J2354 is nice and will pay for itself. I use the Launch J-Box and has yet to fail me. I have done programing on many different vehicles from Ford and GM to BMW and VW. Great repair and video. Looking good Vanessa with that hair cut.

[@daveblane6442]

Absolutely insane complexity!! good job, E.

[@EddieTheGrouch]

Probably a case of Silver Ion Migration causing a short circuit like in the recent instrument panel video :( Being broke with nothing to lose I would crack it open and check the drivers, re-touch the solder joints and clean the board. The IP folks mentioned an acid wash (maybe vinegar or oxalic acid?) would kill those pesky invisible ion trails. Worth it for me to try as I *hate* having my truck held hostage to keep inept stealership service deptartments in business.

[@pinfarmer]

Are you saying the problem could be the lack of lead solder on the pcb instead of the lead free?

[@HUBBABUBBADOOPYDOOP]

pinfarmer Did you watch the videos? I posted them, agreeing with and citing what the other Poster had said. Yes, RoHS solder is very bad. It does not belong in sensitive equipment.

[@gregleithoff5943]

Typical good job Professor! You have a real knack for keeping it real and your common sense approach really works. Keep it up!

[@cojones8518]

2:30 says it all about why car companies are requiring all modules be programmed to the VIN.

[@PineHollowAutoDiagnostics]

"get with the times" hahaha fantastic video Eric! I thought that FP module could only be programmed at an authorized GM dealer ;)

[@SouthMainAuto]

Wow... so am I technically like a dealer guy now then!? man I hope they send me a badge!!

[@dbratboy92]

I am actually a GM dealer tech, and this video really intrigued me. I had no idea that anyone could access tis or sps, I also had no idea that Bosch made any version of the mdi for anyone but dealers. FYI, the ‘‘tis site you are using looked identical to what we use at the dealership, except we access it from a GM site with GM logins as apposed to the acdelco site you went through.

[@twwtb]

Using pliers to hold the nail is a great tip. I'll remember that next time I drive one of those tiny brads. Thanks Mrs. O! :-)

[@johnfuqua1143]

Thank You for enlightening this old man, Regard from Idaho

[@SouthMainAuto]

yes sir!

[@baxrok2.]

100% with you at 22:30. Makes me sick to think of what engineers have done to our transportation. Thanks for taking us along on this one!

[@SouthMainAuto]

Oh man what will the future bring!?

[@twinsonic65]

Busting Mrs. O's chops while she is holding the hammer.............I got to admit that she has a GREAT sense of humor.......bam! owwww!!!

[@andrewwmacfadyen6958]

Before they had a fuel pump they either had a thing called an Autovac --- that used engine vacuum to pull the fuel through or even simpler had gravity feed. Ford Model A had gravity feed if the fuel level was getting low it would stall going up a hill, unless you went up in reverse.

[@jamesu]

Yeah, I guess we will have to cover gravity feed and air pressure feed fuel systems on an older project? God Bless you and your family Eric!

[@rjb6327]

Always nice to see Mrs. O.

[@BADD400]

Good job. Mrs. O. Eric another fine fix.

[@bobbybentley8136]

way to go Eric and nice catch with the gear wrench too

[@HUBBABUBBADOOPYDOOP]

It's all Green Screen

[@SouthMainAuto]

I am my own stunt man.. no green screen.

[@subwayguy1610]

Hahahaha!

[@brianwilmshurst4748]

N

[@vipervette03]

thanks for the videos. Also thanks for cracking open the FM, it's always good to see if the problem was a design problem.

[@CHIBA280CRV]

Good job , and no matter what other scanner you use , you always come home to the Verus...lol. Thanks.

[@robroberts1473]

when I saw Mrs o coming around with that hammer I thought we were going to get a first person view of her whoopin up on Eric. lol

[@davewood406]

While new cars are less and less user serviceable. I remember vividly owning carbureted, mechanical fuel pumped, point ignition vehicles with drum brakes in the front, etc... You cussed them when it was hot, you cussed them when it was cold... I am happy to leave those experiences in the past, cars are way better now. Longer lasting, more reliable... You just really have to find yourself a good shop that you can trust when you do eventually have issues.

[@B.E.Long.63]

People should make sure they have fuel in their vehicle when bringing to shop, me personally i never go under a quarter tank, half tank in winter....

[@upallnight888]

If the repair is too expensive they don't want junk a car with a full or half tank of fuel. Dr. O is usually the last chance before it goes to the boneyard.

[@Goodshaft]

Another great video Eric, a job very well done !!! Some beautiful shop dogs you got there !

[@moneygrip4464]

He said.... whatever dude.. worth the wait of the whole video.

[@Frank-pv1hp]

Hey Eric, it's been my experience when programming ECM's (update or replacement) that you don't need to do a crank relearn unless the ECM stores a code, on GM it's usually a P1336. It will turn the SES light on and let you know.

[@chrismartino9078]

I've had problems using a battery "charger" because the voltage coming out isn't clean. You need to use a battery maintainer where you can set the voltage. Gm likes the voltage to be under 14 volts or they can brick a module.

[@satamanschmidt3428]

Vanessa got a hair cut. I can't believe it. She was beginning to look like Rapunzle. I like the new look. A+ Vanessa.

[@SouthMainAuto]

I told her no shorter!

[@emtscythe3782]

South Main Auto Repair I almost cried when I saw the shorter hair. :(((((((.

[@wyattoneable]

I'm amazed at the level of technology that is required for vehicles these days. Is the Bosch tool fairly new to you? That adds great capabilities to the shop. We'll done Mrs O.

[@SouthMainAuto]

Yep the VCI is pretty new to me but I am learning along the way

[@wyattoneable]

cool.

[@TheDisgruntledMechanic]

great Eric O.

[@robjw66111]

Another great video Mr O, well things have moved on as far as computers and cars go, days of fixing your vw with a beer bootle cap are over :). I think their room for a Mrs O's tip section in your vids...Still thanks for taking teh time to share, given you have a business to run as well, much appreciated. - Rob

[@SteveRobReviews]

Top notch work buddy ? 👍👍

[@logicinthebox]

the guy just wanted a sticker for his windshield so the cops couldn't give him a ticket, and that must be the get a sticker for the windshield procedure. Great follow up vid O, that interface seems to be working well, good to see Mrs O, got to keep up with scanner danners lady.

[@Super032208]

HEY ERICK O. NEW JEEP HAT ABOUT TIME. good fix well done

[@whatdoyouthinktodd]

BEST TIP EVER SHE IS THE BEST!!!!!!!!!!!!!!!!!!!

[@warrenfromga9945]

"MOBF" = Mrs "O" bonus footage. Made my day. :)

[@denniswilkinson1118]

Great work Eric. That's really getting complicated.

[@antimogravino1850]

whats the mileage ? ... great mechanic amazing work ethic . can't get enough of these videos

[@cccdetective787]

Hi Eric and Mrs O. Well I guess for this one you could do it and I can not. You went way past the capabilites of the home garage mechanic in this one. As you say getting tougher and tougher just to keep up with being able to repair the basics. Great video and repair computers needed for just about everything now. Keep the videos coming Brian & Shotty

[@humidbeing]

That AC Delco site is great. I love how you can just buy a pass for a few days of access. Do other car makers have sites like that?

[@Rustbox306]

I can't tell if you're being sarcastic or honest.

[@roberthanna4400]

Having same issues with my Yukon! I’m about a thousand dollars into throwing parts at it !!! I’m going to check my black box tomorrow For any broken wires or corrosion

[@Badgertronix]

I always had fun and games trying to get TIS to run at different Holden dealerships. Got a whole lot harder when they switched to a bluetooth interface.

[@theoldwizard998]

The whole issue with the fuel pump module is emissions related (isn't every thing?) First, designing variable displacement pumps of any kind is difficult. In almost ALL applications a pump is design to be oversized for even the worst case application and excess fluid is just sent back to the sump. With the old vacuum regulated system did just that. The problem with this design is that when an engine is idling (like in a traffic jam) 90+% of the fuel is sent back to the tank. After extended idling the fuel in the tank is hot. Hot fuel gives off vapor. More vapor than the vapor management system (charcoal canister and purge vale) can handle causing the over pressure valve to open and vent to the atmosphere. CARB and EPA are unhappy, Design a reasonably priced pump that can maintain a constant pressure by varying the volume WITHOUT electronic controls or a bypass regulator and you will be a billionaire !

[@garysgarage3669]

Great tip Mrs. O Thanks you.

[@Sandbag1300]

Nice troubleshooting and fix. Lots of stuff crammed in that little black box. Wonder if all of those parts are needed and if that black box is really better than a fuel pressure regulator. Thumbs up video.

[@SouthMainAuto]

Well it is all about emissions and keeping fuel volatility low on a return-less fuel system. The less we can agitate the fuel in the tank the better. Less hydrocarbons :)

[@dafox8587]

Nice to see a shop move into this century and program a module rather than ship it to the dealer.

[@merkurman]

Great vid once again, Dr. O! It is indeed crazy how connected modern cars are, and the amount of programming that sits inside each one. That Bosch unit looks mighty nice! And it should, as it looks to be exactly the same hardware as the GM MDI module, except green instead of blue. Even the VCI Manager software is identical to GM's MDI Manager! Obviously Bosch licenses their design to many companies, just like we see in other automotive systems nowadays. That TDS site looked awful familiar, too! I had to login the other day, and had a chuckle at the news item highlighted in red. Wonder what's up with those 1.4L turbo motors! haha. Keep up the good work and fighting the good fight!

[@BlueCollarBachelor]

Mrs. O needs a channel of tips!

[@billmck12345]

hey eric, nice vid...be carefull about cutting power to a module thats not programmed....like when you turned the key off ; per instructions to do so...if the new module is already installed do not turn the ign off, iv seen plenty of modules rendered useless because of just that "following on sceen instructions" just remember once you power a new gm module, if it hast to be programmed, you must not loose power to it before it is programmed. bill

[@SouthMainAuto]

Well have not ran across that yet with the programming I have done but I will keep that in mind

[@rc3140]

Nice life hack there but I still would have used the pliers 🍻cheers.

[@aboutmyfathersbusiness8324]

I just wrapped my tiny brain around return style fuel pumps with a relay and mechanical fp regulators. Now this....Pthhh

[@SouthMainAuto]

haha oh it gets worse... look at the strategy on some ford fpdm!

[@4stringbazooka]

Great video thanks for the share!

[@tvwize]

Great to see that fix!! Congrats on the 50k Subs! Milestone!

[@jackburner8107]

what a bunch of bull.....all these drivers and control devices......useless junk

[@robertwhite6203]

I agree just more bs to make more $$$$$$ pointless

[@vcmdpropulsion126]

@@robertwhite6203 and i been looking at the programs hes running and you cant even buy the software, its like some kind of rental , $575 for only a year.

[@gerardbonus5354]

Well, a four year old battery an alternator with 200,000 miles on it and I get a flat battery, bought a battery at a shop and ordered a remanufactured alternator ~ diagnosed and verified with your help and the help of many on youtube ~ oh! btw, I fitted it myself ~ I'd hardly come across the pond for a fix, but a local garage has been done out of €200 plus the parts, I believe I can, I believe I can ...... :)

[@upallnight888]

Said the little mechanic as he works on his car.

[@shanekneeshaw3483]

great tip Mrs O

[@GeraldThomasphotojunkie]

Why you gotta be all up in Mrs. O's grille? You let her do her and you do you. 😂

[@SouthMainAuto]

It's my job

[@GeraldThomasphotojunkie]

South Main Auto Repair Too funny! Love your videos man! Keep up the great work.

[@SouthMainAuto]

Thanks :)

[@aussiebloke609]

Don't forget the mechanical fuel pumps that used to run off the crankshaft. Now there's a good time to make sure you don't damage the drive teeth when installing! :-D

[@jackbraithwaite8345]

Really like what you are doing. Entertaining and Informative. Wish I was closer, I would be a customer. Keep it up. 👍

[@mikechiodetti6737]

There is no doubt, that Fuel Pump Control Module is a money maker with the location at the rear of the truck! Ya, I remember the cam shaft pushing on the fuel pump actuator rod that pushed the fuel pump arm! How about this. A "Double Acting" mechanical fuel pump. The upper part was connected to the "Vacuum Wiper Motor" and the intake manifold vacuum port. It helped keep the wipers going when you floored the gas pedal in a rain storm. Without the D. A. Fuel Pump, the wipers would stop when the gas pedal was pushed down and/or floored! Thank God for electric wiper motors! Oh ya. The lower part of the pump handled the gasoline "transfer" duties, from the tank to the carburetor. System worked great until the cam shaft wore down! I saw that module on our 2011 GMC Silverado's with the 6.0 or 6.2 Liter V8's. Strong running truck, LOVES GAS! Showed how much in the low gas mileage! I supposed it was cheaper to put it at the back to control fuel pump power, instead of a logic module up front and a power module in the rear connected by its own CAN or GMLAN! Although, they do use the PCM to control the FPCM logic. To many acronym's ! ! ! Hey! More s**t to complain about! There is a plus to all this! It's after midnight, and I gatta get some sleep! Good night! (Great video!)

[@steveg253]

That little rubber plug on the bottom of the fpcm can also double as a drain plug. I've come across a ton of them full of water. green ooze and swamp water pours out. Most of the modules under those c/k trucks have major corrosion issues. That rubber plug has been the culprit more often than not.

[@int53185]

The surface mount capacitors inside the black box are only rated for 1,000 hours. They're way out of spec by now. Typically used in modern lcd televisions. Length of warranty= 1 year = 3 hours average usage x 365 days = 1,000 hours.

[@NCPDFSB]

great video eric, looking forward for you to use the pico scope .

[@bross956]

Very tasteful intro Mr. O....

[@crank3646]

Higher the emission standards , bigger the circuit boards in it

[@chrisfreemesser5707]

I fully agree with how overly complex cars are these days. And Mrs. O., don't put up with Eric's lip! I use the pliers trick all the time, and the cardboard trick NEVER.

[@SouthMainAuto]

See you learned a life hack!

[@arciefan]

No No, you got it all wrong. It's bubble gum all the way. That way when using either a nail or screw your washers, sealers or gaskets, no longer needed. And never be without, since there's always some under a desk or table and occasionally on bottom of your shoes.

[@dragsterstransmissions]

Fuel mileage yeah right. What you save in gas $$$ you spend in parts and more. I know it's all about what comes out the tail pipe and the ozone layer.

[@brightsummer4442]

Great fix as always!! Thanks Eric!!

[@Jpilgrim30]

Don't know what VCI you use now but the drew tech cardaq plus 2 and the cardaq M are awesome. You can use them to flash program and also as an interface for tech2win, GDS2, and many other manufacturers diagnostic software including Honda, Toyota, BMW and several others. They are great and I haven't had a failed reprogramming event since I've started using it.

[@chungaleta1234]

Cor blimey mate!!!! Your vids are the best !!! As simple as that!

[@samrugtiv5563]

very well done

[@petevernazza6972]

Outstanding.

[@kyhomegarage3430]

Nice work 👍👍

[@bizzfo]

you should sell "whoaaa...." t-shirts, I bet they would fly off the shelf

[@davidbronicki5024]

Eric, this is the future Electronics the big car companies are trying to put the little shops out of business, more job losses more dependency on the government for monetary help. good luck buddy

[@volvo09]

that could be disputed saying this video is also proof that things are moving in the right direction. this is a small shop, and a computerized component requiring dealer type programming was just replaced. if it wasn't for these types of tools (and legislation requiring automakers to make their software available to the public) then this would have to be done at a dealer.

[@Bruel111]

Car companies make their money by selling parts and access to information. Dealers are independently owned and make the money off of the labor. Car company gets paid regardless if it is the dealer or independent shop buying the parts and subscriptions. Henry Ford said he would give everyone in the country a Model T if they would all agree to buy Ford parts.

[@SouthMainAuto]

The right to repair act allows the aftermarket all info that the dealer has. If aftermarket shops can't fix them it is because they don't know how or don't want to know. It is just the way it is.

[@normangallant9879]

Good job

[@AM-021]

Eric O., Keep up your awesomeness. Thanks for all your work. Any chance you'll have some vids coming soon on your other channel Outdoors With Eric O?

[@SouthMainAuto]

I am hoping soon :( I fell so far behind there

[@AM-021]

All good, family and business first. Thanks for all you do!

[@irwinmcevoy]

I think Mrs O nailed it Erics bit was ok too haha

[@SouthMainAuto]

Haha

[@dst6619]

really liked the new intro ! ^-^

[@ZePanthersGang]

Congrats on 50k subs Dr. O!

[@scottiedenton3005]

Great video thanks for the insight

[@Mac-mu9cs]

Have a 2009 Colorado with same issue. Although we have a FRPS reading 90psi and pressure at the port is 90psi I have a Ultra Elite and for what ever reason I could see FPM data but could not control the fuel pump out put. Another odd pid is ignition voltage was reading zero. Everything leads to a bad FPM. Ohms at pin 2 was less than 1 ohm. 5 volt ref was good ground was good. Of course its New England and the spare tire is locked up in position and everything is heavy scaled rot.

[@larryhurst8958]

Good video, but if you had to rely on the Bosch for Dx on this one you might have had issues. The Verus came through.

[@Jimmynitr]

Good stuff!!!! You're good at your job man.

[@jeromewink557]

Life support.

[@63256325N]

Thanks for the video.

[@godsmack113]

yeah it was called a Manuel fuel pump for a carburetor

[@keving5206]

Hey. I completely forgot about those cam driven fuel pumps. Now I feel 65.

[@jgsb111]

Good catch!

[@SouthMainAuto]

Who Mrs. O... yeah she is :)

[@jgsb111]

Haha yea man, that catch!

[@jcmorelos27]

hey eric great video alway looking forward to what your diaging next .. so question... would your autel with the programmer been able to reflash that module for you or what are your thoughts on using that actual scan tool in this case