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Search Auto Parts Search Impala dies when going under 10mph Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Car Troubleshooting RubenWolff New User Dec 23, 2009, 2:05 PM Post #1 of 5 (2369 views) Impala dies when going under 10mph Sign In 2000 Chevrolet Impala Engine size 3.8 Mileage : 137000 miles I was changing my oil with a friend and he had a connector for his computer to the car to see what the engine light was for. There was a problem with the MAF so we decided to try and clean it. Getting to the sensor was a lot harder than we thought we we just cleaned a very dirty grid filtering the air that was going into the engine. After doing this the error code was still there but some more problems arose. When sitting in park the car sounds as if its about to die and then reves the engine to stay alive. This cycle just keeps repeating and alternates between ~700 rpms and ~1400 rpms. If i'm standing with the brake applied in R or D the car starts shaking and dies pretty often. But if i'm in P or N it still does the strange rpm alternation but stays running and does not shake the car. Also sometimes when I take my foot off of the accelerator at 30mph or so the car will start accelerating by itself. Thanks for any help !! chickenhouse Enthusiast Dec 23, 2009, 2:10 PM Post #2 of 5 (2365 views) Re: Impala dies when going under 10mph Sign In Could possibly be an iac. Toothbrush (old & used) & a can of throttle body & injector cleaner. Engine off, intake snorkle off, spray into the throttle body and brush inside to clean up 130k miles of carbon deposits. A little hole by the iac needs attention also. iac is the idle air control valve. Let us know. Sidom Veteran / Moderator Dec 23, 2009, 8:57 PM Post #3 of 5 (2357 views) Re: Impala dies when going under 10mph Sign In If the throttle body is coked up, then it would be a good idea to clean as suggested.... Exactly what code are you getting? What did you use to clean the MAF with? If you unplug the MAF & run the engine does it make a difference? t.mcglaughlin317 New User Dec 24, 2009, 8:59 AM Post #4 of 5 (2353 views) Re: Impala dies when going under 10mph Sign In i kinda had a problem with achevy lumina that was like that.....the engine would rev in park at 3000 rpms and it peaked at 3000 rpms so it sounded like i was httin the gas over and over and over but wasnt....so we took this little black piece that has no label on that was hooked on the air intake im guessing, then the rev went to 700 rpms in park...however if i were to be driving and i stop it would die because it reved sooo low, it would even die when changing from reverse to drive...but i got rid of that piece of crap :))) Sidom Veteran / Moderator Dec 24, 2009, 10:51 AM Post #5 of 5 (2350 views) Re: Impala dies when going under 10mph Sign In In Reply To but i got rid of that piece of crap :))) The black thing or the the Lumina?????? That litte black thing was/is a Mass air flow sensor................ (This post was edited by Sidom on Dec 24, 2009, 10:51 AM)   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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