[jimberg]

For the longest time I had this weird problem where my car would just start idling at 2000+ rpms and I changed the TPS and IAB valve to fix it. No luck.

One day I got the bright idea to check the resistance between my negative battery terminal (disconnected from battery) and the chassis. It was something like 6k ohms. I discovered that the battery wire had corroded from within. I pulled it from the terminal, cleaned the wire with the brush and reassembled it and everything runs perfectly now.

The weirdest thing is that I have a 96 Olds 88 that I bought recently that started stalling for no reason. It could go months between stalls or couldn't last 3 blocks. It turns out that the mechanic who installed a used engine into it neglected to clean the rust off the block before reconnecting a ground. 9k ohms from ground wire to chassis.

Checking resistance from ground wire to chassis is now my first check when weird, unexplainable stuff starts happening.

Is your fuel pump really bad or is it just not grounded correctly? Our sensors depend a lot on voltages and extra resistance in the system can throw those sensors way off.