My old Dodge Sgadow has run great since I bought it used 4 or 5 years ago. Now it has developed a miss and backfires. The other day I took it for a short trip it began to run so rough I was unsure I would make i back home. I replaced the air filter, fuel filter and spark plugs.. seems to of helped big time.. At least I thought so.. I took it for a test drive missed a couple times then cleared up ran great (late evening cooler) then I too it today (100 + degrees) ran great at first then started to miss and back fire at idle at say a stop sign. However, when I raised idle just a little all seemes ok I drove it home and notice the miss and backfiring only occurs ar idle and when I first start to raise the idle it migh backfire a little but at 20 to
25 MPH runs like a top.. Any ideas? I am wondering about the spark plugs wires as far as I know they are original.. Also was advised by a frien that shadows have a timer device under the rotor?? It is a 1991 2/3 motor autoany ideas?? thanks