[93stockerstang]

93 convertable 2.3 stocker, Starts great idles fine till kickdown then it goes to crap with a slight jumping like its out of time, changed plugs, wires, timing belt, cleaned MAF,IAC no check engine light ever came on but rough idle after warmup??????????Runs great when driving studders at stops????????new fuel filter

[b_chandler]

What shape are the vacuum hoses in? You may have a vacuum leak.

[93stockerstang]

everything was good till i changed the sparkplugs I put autolites in because I don't know when they were changed last and they were all rusty it has 85,000 on it now the hoses all look good, I guess I could get soem motorcraft plugs and try them

[93stockerstang]

Finally figured it out it was the EGR vavle hope someone can learn from this. And yes I am new and sounded pretty demanding looking for the answer you know how it is!!!!!!!!