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No exhaust leaks that I can hear cold or warm. I did check the codes and it lists one. P0627 - Open or shorted condition detected in fuel pump relay control circuit. Drove it almost 200 miles today. Seem to cruise down the highway great. Only the rough idle issue. You come to a stop and the idle see...

Changed out the plugs and wires. Cleaned/soaked the IAC. Cleaned the MAP sensor in the intake manifold. Ran a big container of Tecron cleaner through a tank of gas this week. No changes...

Going to get an auto part store to check if there are any codes.

I sprayed out and let soak for 4 hours the housing. It wasn't very dirty. Had no affect. I cannot seem to find what the spec is for idle RPMs. In Park it idles at 730 RPM (+-10) and when in Drive it bumps up to 775 RPM (+-10) on my Sun multimeter. Add about 100 RPM and the vibration you feel in the ...

I'll have to ask tomorrow.

What would the cleaning process be? Where is it located at?

I have a problem that the shop can't seem to resolve. The car has run great up to this point with all the standard maintenance done (oil changes, transmission fluid changes, timing belt... over its lifetime). Changed out plugs & wires with no affect. Recently the car developed a very rough idle / ra...