89 YJ Rough Idle

[ZR-7S]

Bought an 89 YJ today. It has a rough idle that I can't seem to figure out. I pulled the fuel injector out and cleaned it. When I put it back together it ran really smooth for about 5 minutes then went right back to the rough idle again. I have been told the MAP Sensor may need to be replaced. What else do I need to check (have checked vaccuum hoses twice) and how do I check the MAP sensor to see if it is defective?

Thanks,,

Brian

[paintguy]

Hey ZR-7S. Could it be: Clogged cat? tune-up?-->cap/rotor/wires/plugs?

Definately Sea Foam her fully (get a can at your local parts store and follow the directions on the canto the T).
Fuel filter?
Start with the simple/less expensive stuff first and move up the ladder from there.
Don't worry, you'll have her idling like a dream in no time!
Keep us updated.
:spinz:

[ZR-7S]

Fixed the rough idle issue. Had a loose intake manifold bolt. Funny how its usually something simpe.

Thanks,

Brian