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Question
 i have a 2001 chevy blazer zr2. recently i noticed that my idle kept jumping like when your plug wires are arching out. idle kept dropping like it was gonna stall. i was gonna change the plug wires but then i noticed it only does it when i put the a/c on or the windshield defroster which works with the a/c. can you please tell me what the problem might be. this started happening a few weeks after i had the heater core replaced.

Answer
HI Mike,
      I think that it could be a relay, you might have to get it hooked up to a comp. to see where it is comming from, but try to listen for a clicking sound from the fuse box or under the dash when you find the one thats clicking try to get a new one and see what happens ok.
Roger

Chevrolet

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Roger J.M. Warrington

Expertise

I can help you with most standard type things from 1955 chevys up to around 1975 (1975)>> chevys in differnt areas. engine work heads-cams-trannys-drive train-brakes-some elect. dos and donts. PS UP TO 1975 !! !!!!!!!!!!! I will try with any others after that date. state up to 1975 but I still get 2006-007 etc. I guess you do not read this far ! !

Experience

All i can remember growing up is working on cars and making them loud and fast , and when i started to make money i would sink all of it into my cars so i could get them to go faster and look great. what else is there !I would love a challange to trouble shoot, as it is fun finding what is wrong when all others can not .ON the older cars not past 1975s , etc. so please I will try to help with the newer cars but do not grade me bad if I can not help your 2006 car.etc.

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