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anyone having issues with rough idle at stop lights in drive?? 4cyl ohc
rough idle at stop light
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4,169 Posts
Wrong section, moving....
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96 Posts
I have a 2011 Malibu LT with a 2.4L engine. I have problems with an intermittent rough idle when stopped in gear. I had the cam positioning sensors replaced at the dealer last month and it now idles smoother at a stop light, but I still get a intermittent hesitation in the idle. It hasn't stopped yet, but it's almost like you turned off the ignition switch for a second, then turned it back on. As far as I know no codes, and no check engine light. The dealer said the parts are guaranteed for two years.
Clean the throttle body and the MAF sensor. (Don't touch the MAF sensor, remove it and use a specified spray cleaner like CRC MAF cleaner.) Also, check the MAF connector for loose wires. It was a poor place for GM to cheap out.
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96 Posts
I'm not familiar with all the technical stuff, I'll make a copy of your fix and give it to my dealer when I go in for my next oil change. Thank you.
With a simple Google search you can find quite a bit of info on "MAF sensor", which could benefit you when taking your car to the dealer. They'll suggest and even recommend certain procedures that may or may not be worth the money, but armed with more information you'll be in a better position to decide what to do and what to decline.
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Thanks for your help. I enjoy the helpful advice I get from the Malibu Forum. I did look at some video's on cleaning the MAF sensor. Also, troubleshooting. I know where it is now and I'll check for loose connections. On cleaning, I might have to leave that to the dealership. I have always been given great service from them, and I've grown to trust their advice.
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I checked out cleaning the MAF sensor and the throttle body on U-Tube, and it doesn't look that tough. The worst part looks to be taking off the Plenum. If it gets worse, I'll get a can of CRC MAF Cleaner, and give it a try. It looks like when you get down to the throttle body, it's best to wipe it clean with the cleaner on a rag, then douse it with spray. I have been using regular Shell gas, as they tore down the only E85 station (FS) to modernize and put add E18. Thanks for the advice, maybe I'll go back to wrenching on my own car!?
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