5th Gear Member
Join Date: Jun 2004
Location: Pole Position #1
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check the rough idle thread.....when they removed your engine to rebuild it, they (most shops) dont fine tune the adjustment tensioner for the throttle making it bounce because the ICV (idle control valve that electronically controls the cars idling)
is trying to keep the car from stalling out when the car tries.
if u look on your throttle body, follow the throttle cable just behind where it connects to the throttle bdy. there will be a small ovalish black piece that you can spin to finely tune the idle with by tightening it.
its like an idle mixture screw on a old 4-barrel carb...but totally different.
turn it while your car is idling 1/2!!!! ONE-HALF!!!!! a turn at a time. then rev the engine up a bit and see where it settles. adjust till you are in the 700-800rpm range and then shut the car off completely.
when you start it up again, the ICV will reset to the new idle speed and hopefully the bouncing stops. adjust more if needed, but pay attention to you RPM'S....IF U HIT 1100RPM's, then you need to look elseware.
the air in the timing????? WTF?????? what sort of shop is this and do you trust them???????? how much was ur rebuild? and if the problem was not there when you brought it in....ITS THEIR PROBLEM!!!!!!! go talk to another shop...not the dealer, and explain the situation if my little trick didnt work. you will get a second opinion and maybe a few ideas.
hope it helps. lemme know what happens and ill talk to my boss on Monday.