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dinosaurdoctor
Guest
hi guys,on the heals of our recent success with my airbag light i thought we might try another of my cars mystique items.recently after a trip the car has decided not to idle well.no codes are present,the car has been allowed to speak to another computer,the results being that everything is fine.i have checked for vacume leaks.i have cleaned and resealed the throttle body,and replaced the idle air motor.the car starts perfectly,but does start running at about 1100 rpm and then drops to a normal idle immediately.the car surges at about 1500 rpm in drive .when you decelerate the car again surges at approx 1500.i have not done a compression test as the car runs so well otherwise.i have recently replaced the cap,rotor,wires and installed bosch platinums.the tail pipes are now black where before it ran so clean that i had painted the inside of the tailpipes.when the car starts cold it idles perfectly,as temp gets higher the idle gets rougher.the idle also gets better and worse when the mood strikes it.idle is slightly better when the a/c is on,but still not perfect.i have run two tanks of fuel with injector cleaner.the air cleaner is clean.whatever this is it does not generate a fault code.the car has approx.125,000 miles.i did the throttle body work yesterday,is there something i need to do to allow the computer to adjust to the new idle motor? battery was also disconnected to repair the air bag sensor.i'am thinking it could be valves because of the rough idle and lack of fault codes.and residual compression at higher than idle speeds makes the car appear to be a good runner/rocket.i also have replaced the exhaust from the cat back. any help you can give me will be appreciated...thank you...wayne