that lean code would indicate low fuel pressure so would the miss
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Yeah I am thinking wiring fault, bad connection either with the FPCM or the pressure sensor because of the sensor code. And if the control module can’t get an accurate pressure, what does it do then? Worst part is it’s intermittent. You can’t fix what isn’t broken. Could also be the module is heat sensitive.
And I am constrained in my options for diagnosis and repair. Summers we travel and mostly live in RV parks. Vehicle repair is usually discouraged or forbidden on the premises. So when we’re on the road I have to outsource things I would DIY at home.
And I am constrained in my options for diagnosis and repair. Summers we travel and mostly live in RV parks. Vehicle repair is usually discouraged or forbidden on the premises. So when we’re on the road I have to outsource things I would DIY at home.
Is your fuel pump original?
you could check and clean up the fpcm harness anywhere, walmart parking lot, that's the first thing I would check, testing the fuel pressure is just a screw on valve I think it's called a Schroeder valve on the fuel rail, the fuel pressure tester will come with a couple different universal fittings. $30 diy and you can monitor it for as long as you need to
testing the fuel pressure will tell you if the sensor is working properly or not, I would use a scanner and the tester at the same time and see if they match up, if the fuel pressure is good with the tester and the sensor is giving erratic readings then you know. the only catch is the stupid sensor is only $25 or so......
Seems right to me. The FPCM is known to get water inside it and wreak havoc. A few of the YouTube regulars seal new ones up with RTV before installing them.
If you do get an analog fuel pressure gauge, it should run pretty consistently on the rail at 43 PSI +/-. If the pressure varies widely with load changes, pretty likely the pump. I bought this one a while back, it is a surprisingly good piece.
Amazon.com: Actron CP7818 Fuel Pressure Tester Kit,Black: Automotive
Buy Actron CP7818 Fuel Pressure Tester Kit, Black: Fuel Pressure Testers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
I think mine is this one or one just like it
Amazon.com: FAERSI Fuel Injection Pressure Test Kit - Universal Fuel Oil Engine Diagnostic Gauge Tester Set with Fittings, Instructions, Storage Case for Car Motorcycle Truck RV SUV & ATV, 0-100 PSI / 0-7 Bar: Automotive
Buy FAERSI Fuel Injection Pressure Test Kit - Universal Fuel Oil Engine Diagnostic Gauge Tester Set with Fittings, Instructions, Storage Case for Car Motorcycle Truck RV SUV & ATV, 0-100 PSI / 0-7 Bar: Fuel Pressure Testers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Tonyrodz
Resident Resident
Cheaper then HF.
I bet you could check the fuel pressure of a Moto Guzzi with that kit!
ya it cover's old school and new school for the most part, I was going to try and test my neighbors lexus with it but would have had to cut the fuel line stupid thing didn't have port on it and it was routed all weirdI bet you could check the fuel pressure of a Moto Guzzi with that kit!
it is if you don't have to pay tax and buy something else to hit the minimum free shipping total, I don't use "prime" but I do have a resale account so no tax
these cookies usually do the trick
