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rough idle

Posted: May 10th, 2006, 3:30 am
by 4gotn
my car idles high when my foot is not on the brake and when i hit the brake the car jumps between 1.5k and 1 k
its not the idle speed valve or anything
i already chedked
the lights also dim when i hit the brake
i was told by a friend that it may be the throttle position sensor...i doubt it though
any ideas??

Posted: May 10th, 2006, 6:06 pm
by ariesdude
bad alternator? The 4 brake lights (+3 center mount lights) take up a lot of power - it is noticeable especially if the headlights are on.

Other than that - the brake booster gets a vaccum line from the tb using a special hose. If there is something screwy going on there it might cause a vaccum leak that affects idle.

Re: rough idle

Posted: May 10th, 2006, 7:27 pm
by joe 92mx3
before you change the altinator put a meter on it.it should read 12to14volts at a idle try hitting your brakes see how much it draws my idle acts funny when i turn the wheel

Posted: May 11th, 2006, 12:47 am
by 4gotn
thanx for the replys ill try testing the alt tomorrow
btw
why was my thread moved to 4cyl....it have a 4 cyl but the problem isnt a specialty problem its just a general engine problem..i would have done better to have it on the general post where it was...admin plz respond