Mike Romain

If banging makes a difference, I would be checking the electrical
connections on the fuel pump. The plug will get corroded and the ground
tag to the frame there can also get corroded.

Or the pump is just plain wearing out....

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

ghero8 wrote:
>
> My 94 Grand Cherokee is intermittently stalling. It cranks fine, but
> won't fire up. Sometimes when it does fires, it will idle very low
> and then die out. I called a tow truck once and the guy came and then
> banged on my fuel tank. The Jeep then fired up beautifully - he said
> that it was probably a bad fuel pump. On the occasion where it once
> stalled, then idled very low, I also banged the fuel tank and then the
> JGC immediately picked up it's idle and ran smoothly.
>
> The dealer that I brought it to, says the banging is not necessarily
> indicative of a bad fuel pump. He wants me to tow it in when it's
> stalled again and then he can diagnose it. (This is a pain since my
> wife drives the Jeep and I don't want her stranded)
>
> Does the helpful "fuel tank banging" mean I have a bad fuel pump? Or,
> could the banging mean a bad crankshaft sensor or something? Thanks.