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Search Auto Parts Search Air Conditioning backfiring noise Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum cargal New User Aug 5, 2012, 5:30 PM Post #1 of 6 (2294 views) Air Conditioning backfiring noise Sign In Hi I have a 2000 Nissan Altima 4 cylinder with 112,000 gentle miles. A couple months ago I noticed an intermittent noise that sounded like a chirpy- psst sound coming from the exhaust system. Since then have noticed it only happens when the air conditioning is on. Any ideas what this might be would be welcome. It's one of those things that if I take it to a garage and the mechanic will do a test drive, it won't happen til he leaves the car:):) Discretesignals Ultimate Carjunky / Moderator Aug 5, 2012, 5:39 PM Post #2 of 6 (2286 views) Re: Air Conditioning backfiring noise Sign In Do you hear it from inside the vehicle or outside the vehicle? Does it make the noise when the vehicle isn't moving? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. Hammer Time Ultimate Carjunky / Moderator Aug 5, 2012, 5:40 PM Post #3 of 6 (2283 views) Re: Air Conditioning backfiring noise Sign In Pretty impossible to diagnose a noise over the Internet. could be a belt, tensioner, A? comprtessor or about a dozen other possibilities. It really needs to be checked out more thoroughly by a tech. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. cargal New User Aug 6, 2012, 6:25 AM Post #4 of 6 (2240 views) Re: Air Conditioning backfiring noise Sign In I can hear it inside the vehicle with radio off. I don't think it's ever happened when the vehicle is stopped. cargal New User Aug 6, 2012, 6:29 AM Post #5 of 6 (2239 views) Re: Air Conditioning backfiring noise Sign In Funny you mention belt because when I start the car with a/c on there seems to be a squeak that I don't remember being there. I had the serpentine belt replaced a few months back. Do you think there's any connection? I will probably have to take it in to be looked at but I'm just trying to get a little knowledge before I go in. Hammer Time Ultimate Carjunky / Moderator Aug 6, 2012, 9:01 AM Post #6 of 6 (2234 views) Re: Air Conditioning backfiring noise Sign In I'd take it back to the guy that did the belt and tell him it's making noise. Let him prove otherwise. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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