4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Rough Idle

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Old 09-02-2006, 09:20 PM
  #1  
0hOneGT
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Default Rough Idle

Ever since I've had my car (couple months) its had a fairly rough idle. At about 750 rpm, the idle can be so rough at times that my radar detector shakes on the windshield. One of my friends described it as feeling like she was sitting in one of those vibrating recliners lol. Bring the rpm up to about 1000 and it goes away completely, and it doesn't seem to do it on a cold start, but after the cars been running a while. Any ideas what could be causing this and is it something I should be worried about?
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Old 09-02-2006, 09:23 PM
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Cornbread01
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Default RE: Rough Idle

i dont know for sure but clean out the iac and check for vacuume leaks
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Old 09-02-2006, 09:37 PM
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David_K
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Default RE: Rough Idle

i would get a can of electricla connector cleaner and start pullin sensors and cleaning thme
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Old 09-02-2006, 11:06 PM
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korn253
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Default RE: Rough Idle

my ****ing camaro did that, and i couldnt stand it, i changed the tpi sensor and the spark plugs and wires, and got no result, i never tried ne thing else becuz it was just a piece, the guy that owned it b4 me must not of had ne money cuz he had an interesting method of doing things to that car, but ne ways, i got my mustnag and it kinda idles a little rough, its barely noticeable, but i notice it. but ive also had issues that seem to come from a dirty or bad mass flow sensor, so id start by cleaning that if i were u
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