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| Cavalier Problem Diagnosis Got a problem you can't fix? We can help. |
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07-26-2008, 12:51 AM
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#1 | |
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AF Newbie
 Join Date: May 2006
Location: slippery rock, Pennsylvania
Posts: 49
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clacking sound at start
when starting my '04 cavalier,as turning ignition on there is a clacking or rapping type sound coming from around the throttle body,something is engaging there as i start it.sometimes it has a small vacuum sound,almost like a very small backfire.car runs very smooth,and starts easy,just that rapping sound is wrong.what moving part is near the throttle body,intake that engages at the turn of the key(when the fuel pump kicks on) and prior to the starter solenoid kicking in?thanks
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08-10-2008, 07:57 AM
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#2 | |
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AF Newbie
Join Date: Jul 2008
Location: bear, Delaware
Posts: 43
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Re: clacking sound at start
my understanding is that it is an ABS system check. if you have an owners manual, you might find out something in there. my 94 does it, and a 99 i have does it, also. it drove me nuts for awhile til i read about it. good luck! hope this helps!
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08-12-2008, 04:56 PM
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#3 | |
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AF Enthusiast
Join Date: Dec 2004
Location: Shellsburg, Iowa
Posts: 3,218
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Re: clacking sound at start
I'd guess it's the IAC solenoid. Have someone turn the key for you and use a screwdriver as a stethoscope to find the noise.
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'04 Cavalier coupe M/T 2.2 Ecotec Supercharged 14 PSI boost, charge air cooler, 42# injectors Tuned with HP Tuners Poly engine/trans/control arm bushings Self built and self programmed progressive methanol injection system |
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