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Thanks for responding! I really appreciate it!!! Well, yesterday I started it and just let sit there and run. It idled fine until it warned up and then the rpm's dropped and it started running real rough, it was obviously overloading with gas.....the fumes and smoke were awful. No check engine...

I have a 1994 4.0L.....306,000 miles. Hesitate's badly when accelerating....spits and sputters. If you rev it up to say 3000 rpms, when it idles back down it immediately cuts off. I have changed the fuel pump, TP and MAF sensors......no change! Help!