rough idle - JeepForum.com

 
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post #1 of 5 Old 04-28-2012, 10:41 PM Thread Starter
JustinBooth52
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2009 JK Wrangler 
 
Join Date: Apr 2012
Location: Buffalo
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rough idle

when I start my 1998 wrangler it seams to idle really rough. it cuts in an out and to the point that it will quit. it always does it no matter the eng. temp. or air temp. once I get moving it doesn't do it any more or seam sluggish. it has new fuel pump, pressure regulator, spark plugs and wires.


2009 Red Rock JKU building it my way, one bolt at a time, with out instructions.
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post #2 of 5 Old 04-30-2012, 05:49 AM
cruiser54
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1990 MJ Comanche 
 
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A good throttle body and IAC cleaning is where I'd start. No codes?
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post #3 of 5 Old 04-30-2012, 11:40 PM
jnicewan
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1995 ZJ 
 
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I would also check for a vacuum leak, inspect all rubber vacuum hoses. You can also spray some carb cleaner around the hoses and intake gaskets etc to aid with finding a vac leak.
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post #4 of 5 Old 05-30-2012, 08:11 PM Thread Starter
JustinBooth52
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2009 JK Wrangler 
 
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when ever it rains and i try to start it it almost won't or i spray the engine bay with the water hoose it spudders and quits. there are not codes. I have replaced the distributer cap and spark plug wires. it just sudders while idling and quits

2009 Red Rock JKU building it my way, one bolt at a time, with out instructions.
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post #5 of 5 Old 05-31-2012, 07:51 PM
Tracy1974
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2004 TJ Wrangler 
 
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Location: Corpus Christi
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Check your distributor at night in a real dark area. I know u said u replaced cap and not sure on that one if the base is metal or plastic that the cap goes on but I had a truck that had a plastic base and I could see an arc at night where the current was jumping from rotor to the crack because the crack hold moisture thus causing a misfire especially in moist conditions. And I have also seen a new cap do this. You can't see the hairline crack from the eye but u will see the arc at night. Very well might not b the case for u but it won't cost anything but a minute of your time.
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