Question about Chevrolet Malibu
Car is stalling at idle, gas smell through vents and loss of power
Throttle position sensor or mass air sensor, more than likely TPS sensor going bad and hasn't thrown code yet.
Posted on Jan 12, 2015
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Posted on Jan 02, 2017
hmmm shaking may be a tune up issue and as far as the gas smell goes i would take it to the dealersdhip and have them diagnose it
Posted on Dec 16, 2008
Won't idle after battery change... SOLVED! well, for me anyway. :)
I just experienced the same problem on my 2002 tundra last night, and fixed it this morning after sleeping on the problem. Here's how it went.
I cleaned the terminals, etc., and replaced the battery, as it was 7yo and old and on the verge of failing.
Immediately after this, the truck would start right up but the idle would drop to about 100 RPM, then slower and slower, and eventually stall. Every time.
I warmed it up and drove around the neighborhood for about 45 minutes, thinking the computer needed to re-learn it's Idle settings, etc... No change.
This morning, I decided to go after the cheap and easy fixes first...
Inspect throttle body... it was filthy full of black sticky dirty/sludgy stuff. I cleaned it off using a rag and some brake cleaner. DID NOT spray brake cleaner IN the opening; just on the rag and then wiped all of the gunk out of the opening, butterfly, and inside as far as my fingers would reach with the butterfly open.
Reassembled everything, started truck... runs perfectly.
Dead battery? Won't run? Dirty throttle body? How do these all tie together?! Here's why (to the best of my understanding).
Over the past 65k miles, dirt and gunk slowly but surely builds up in the throttle body. At some point, the computer senses that this affects the air/fuel mixture or something of this nature. The computer compensates for this, and stores it to it's memory. Sometime during the vehicles lifetime, the battery fails or is disconnected. The compensation settings that the computer stored are lost when the power is disconnected, so the next time the engine is started it's telling everything to behave as default... but the car isn't in a default state, there's **** in the throttle body... or a bad sensor, etc.
I could be way off, but my gut feeling is that this is correct. My advice: Pull the intake tube off the front of the engine and clean the gunk out of the throttle body. It should be the first thing to try, since it's the cheapest and easiest thing that I can think of.
Posted on Apr 18, 2009
Your catalytic converter is plugged up,
If you check the exhaust output at the tailpipe you will find it restricted.
Let me know if I can assist further.
Posted on May 08, 2009
i had the same problem... Change the spark plugs and the ignition coils, All of them... It usually accelerates without giving it gas.. Don't worry about that...
Posted on Jul 05, 2009
Ignition system sounds probable on vhicle when everything gets warmed up. High pitched hum could be bad tire or worse bearing.
Posted on Oct 02, 2009
Testimonial: "Thank You for your response. The huming sound is present on idle from start-up,tires have just been replaced, would fuel pump be suspect?"
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