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Old 12-20-2010, 10:40 PM   #1
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Default All of you MAF guru'* out there....(fixed)

Hello,
Engine stumbles at low load/rpm. Idles fine, high rpm/load runs great. been through ignition parts- all ok, plugs and wires replaced. Car had cat replaced because of noise a month ago. I unplug MAF low rpm stumble goes away.... Replaced MAF with NAPA part, car stumbles as it did before. I unplug MAF car runs great. What am I missing here?? Crazy Bonne
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Old 12-20-2010, 10:49 PM   #2
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Check for a bad connection in the plug on the wire harness. Look for any corrosion.
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Old 12-21-2010, 10:05 PM   #3
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UPDATE:
Checked all connections... Car runs, idles great, then in a flash sputters under load. I noticed the egr clicking. Unplug the egr, no flow of gasses into intake, car runs great.. Plug in back in, car stumbles under 1500rpm load. Does this sound like a vacuum leak and ecm is energizing egr, which make lack of vaccum in intake worse (resulting in rough operation) Am I thinking right? All of this rough operation occurs around 1500 to 1800 light load. No codes btw
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Old 12-21-2010, 10:07 PM   #4
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Check the EGR tube between the solenoid and the exhaust manifold. Sometimes these crack.
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Old 01-03-2011, 07:47 PM   #5
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Thanks for the reply btw. Checked out the pipe- no cracks.. Right now, i am riding aound with the EGR unplugged and the car runs great-of course I am most likely causing myself big issues down the road...
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Old 01-03-2011, 08:55 PM   #6
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Go to a salvage yard and try to find a EGR to replace what you have. If it'* running better with it unplugged, it'* a good bet that'* the problem.
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Old 01-13-2012, 09:57 AM   #7
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Faulty EGR btw- thanks for your help
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Old 01-13-2012, 12:14 PM   #8
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Good to hear. I'll mark as fixed. Thanks.
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