Just thought Id share a 'quick' story
When I first got my zj, I gave my older bro my cutlass. It was running rough, bad millage, etc, just didn't want it.
So he starts replacing things left and right, it was a free car to him, so why not dump a little into it, plus he needed something better that his 5mpg silverado.
It started running better, but not great. When doing the fuel filter we noticed when we went to release pressure by undoing the gas cap, nothing happened, meaning there was no pressure to release. So we finish up, go grab a new cap, slap it on, and I'll be damned, it ran like new with the new one.
1994 Grand Cherokee Limited 5.2L V8 318, Spectre cold air intake, Flowmaster Super44 muffler to 3.5" resonator tip, 30x9.5 BFG A/T's, Custom Tranny and TC shifter mod
My Build Thread--not sure how to make that the link-http://www.jeepforum.com/forum/f13/my-build-thread-1568707/