Chevy Truck - P069E, P0172, P0174 - Running Rich FPCM Trouble - The Fix
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Date: 2020-08-05
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Comments and reviews: 9
Mike
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 st to complain about! There is a plus to all this! It's after midnight, and I gatta get some sleep! Good night! (Great video)
reply
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 st to complain about! There is a plus to all this! It's after midnight, and I gatta get some sleep! Good night! (Great video)
reply
Johnny
When I'm at idle with the same truck as this one, my fuel pressure jumps up to 57psi from the standard 43psi as it's also shown here while you were idling and I get a p0300. I replaced and programmed this black box already and same thing happens. Question is other than this module, what else will command the fuel pressure to be raised at idle is it the ecm? Thanks and do you know a great mechanic such as yourself located here in Los Angeles California? Thanks.
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When I'm at idle with the same truck as this one, my fuel pressure jumps up to 57psi from the standard 43psi as it's also shown here while you were idling and I get a p0300. I replaced and programmed this black box already and same thing happens. Question is other than this module, what else will command the fuel pressure to be raised at idle is it the ecm? Thanks and do you know a great mechanic such as yourself located here in Los Angeles California? Thanks.
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Cristi
So between the diagnosing work replacing the module and flashing the new model how much a job like this cost? I mean you spent quite a bit of time getting to the root of the issue and if you have not encountered the issue before I believe there is no way around the diagnostic work. If you have guest it would be the module and you would have a known good module on hand from another vehicle would you be able to just Swap and see that it's running properly?
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So between the diagnosing work replacing the module and flashing the new model how much a job like this cost? I mean you spent quite a bit of time getting to the root of the issue and if you have not encountered the issue before I believe there is no way around the diagnostic work. If you have guest it would be the module and you would have a known good module on hand from another vehicle would you be able to just Swap and see that it's running properly?
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Jan
Well, even as an electronics engineer, I have to say that setup looks overly complicated for what it does. However, here's what happens: design teams decide what kind of platform they're going to use for the 'brains' of the car and it spirals from there, because, if you're going to make things in numbers, the more of the same components you can use, the cheaper it gets, so even apparently trivial functions get handled by what looks like a gazillion pin FPGA
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Well, even as an electronics engineer, I have to say that setup looks overly complicated for what it does. However, here's what happens: design teams decide what kind of platform they're going to use for the 'brains' of the car and it spirals from there, because, if you're going to make things in numbers, the more of the same components you can use, the cheaper it gets, so even apparently trivial functions get handled by what looks like a gazillion pin FPGA
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Don
Yes Sir you know anything about a passkey security system on a 2009 canyon truck 4wd? sometimes it will not start and have to wait for the computer to reset. usually 15 mins. then it always starts. big problem, afraid to shut the engine off, to run into a quick stop, it may not start and have to wait the 15 mins. Thanks for your time and consideration on this problem of mine! Don Edmiston of Oklahoma!
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Yes Sir you know anything about a passkey security system on a 2009 canyon truck 4wd? sometimes it will not start and have to wait for the computer to reset. usually 15 mins. then it always starts. big problem, afraid to shut the engine off, to run into a quick stop, it may not start and have to wait the 15 mins. Thanks for your time and consideration on this problem of mine! Don Edmiston of Oklahoma!
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Robert
Ive 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! Ive 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!
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Ive 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! Ive 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!
reply
John
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.
reply
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.
reply
spelunkerd
Dang! Too bad these won't do a simple plug-and-play installation like most computer peripheral systems. Market forces in the computing world force easy installation, but new vehicle owners have to marry into the dealer system. If GM had failed ten years ago, the car would be junk because of failed support.
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Dang! Too bad these won't do a simple plug-and-play installation like most computer peripheral systems. Market forces in the computing world force easy installation, but new vehicle owners have to marry into the dealer system. If GM had failed ten years ago, the car would be junk because of failed support.
reply
twistedsledder
Do you have a vid covering removal of spare tire on a GMC Sierra mine needs to be cut unless you have a technique it does not lower any inches and the pieces you get with the jack equipment strip out trying to turn it down it's not secondary latch it's just junk.
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Do you have a vid covering removal of spare tire on a GMC Sierra mine needs to be cut unless you have a technique it does not lower any inches and the pieces you get with the jack equipment strip out trying to turn it down it's not secondary latch it's just junk.
reply
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