Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello. If you have fuel pressure and the car runs off of starter fluid that tells me the ECM is not injecting fuel. Is there any fault codes or security light flashing when cranking ?
Sounds like there is a communications fault. Is the gas gauge the only gauge that goes erratic ?
Ok is there anything that was worked on right before this happened ? Or is there anything aftermarket installed in the car ?
Ok I will have to opt out at this point. This problem is not a common one for me and I don't want to waste any more of your time. My apologies. Another expert should be along soon to help.
good morning my name is ***** ***** I will assist
lets start with the actual fuel pressure. what is the exact pressure key on, engine off???
what have replaced to this point???
ok, I see in your post that it will run on its own?? or will it only run on the starting fluid???
ok I attached a wiring diagram for you to see that the power feed to the injectors comes from ecm fuse 1. check for power to that fuse.
ok the fuel gauge going crazy and the not running at times have one thin in common, the fuel pump module. there is a connector from the car body harness to the module that has big issues with corrosion and bad connections.
check the connector for any damage or corrosion
no, bcm has no effect on the fuel system. it controls body functions not engine functions.
did you check the wiring diagram I sent to you
make sure you check all fuses with a test light for power
to replace the module yes. it is too tall to remove in the truck.
the module contains the fuel pump and the sender unit.