Started missing out after one tank of ify gas in arizona progressivly got worse. used scan tool to pull codes the codes were for multiple misfire on 5 and 7 cylinders. i changed plug,wires,cap,rotor. no change. neither the wires plugs cap or rotor had any signs of carbon tracks, cracks or fouling. researched further and assumed it might be an induction misfire.found the proper routing for wires in tps service bulliten. no change talked to mechanic who specialized in cylinder heads,he said the exhaust valve seats were going. recomended replacing heads.i checked compression all cylinder readings were between154 lb. to 165lb. so discounted new heads. the funny thing is when it is running (barely) i can pull both the 5 and 7 plug wires there is no change in engine but i can hear the what sounds like spark jumping from the spark plug top to the spark plug heat sheild while i am holding the wires away from the engine!!! i am stumped
Aloha We have just replaced all of what you have replaced, plus water pump, fuel pump, pcv valve and 02 sensor. Took it to mechanic today we had misfire on 1,2,6,7. Mechanic said that the 99 dodge is known for bad computers, he checked ours and works great turns out that it was the coil. Ours was jumping 1/4 inch and had a orange/yellow spark. it is supposed to have a 1 inch spark and be blue. This has solved our problems after 527 dollars later.
Check the coil!
The fuel injectors might be plugged with **** from the bad gas, try using 1 1/2 bottles of fuel injector cleaner next time you fill up. PLEASE RATE MY ANSWER.
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