Check engine light
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,216
Likes: 1
From: westminster California
Check engine light
My 2002 has the check engine light on continuosly when driving. It has a rough idle like it wants to die but at 10-20 mph and above it smooths out.
Please advise.
Please advise.
Burning Brakes
Joined: Mar 2010
Posts: 1,189
Likes: 4
From: Freeport, FL
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Search on the C(urrent) codes like I did:
http://forums.corvetteforum.com/c5-t...howing-up.html
is just one posting on the subject.
Clear them all and see what returns.
http://forums.corvetteforum.com/c5-t...howing-up.html
is just one posting on the subject.
Clear them all and see what returns.
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,216
Likes: 1
From: westminster California
The check engine light has never come on before in the 6 years I have owned the car. The car sat about 2 days before I drove it andthis happened. Does letting the car sit without being driven cause a malfunction in the air seals or the pcv lines?
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Tech Contributor
Joined: Jan 2007
Posts: 19,361
Likes: 1,128
From: Dyer, IN
No. You will have to peform a physical inspection....as already suggested.
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Burning Brakes
Joined: Mar 2010
Posts: 1,189
Likes: 4
From: Freeport, FL
Any other symptoms? Such as reduced mileage, black smoke from tailpipes, coolant temp reading lower than usual, anything?
It's odd to think that the MAF sensor would dirty, most filtration systems prevent this, even oiled filters. It could be a bad MAF sensor perhaps. Tap the MAF with the handle of a screwdriver while the engine is idling and see if it stumbles.
Like mentioned above, do physical inspection too. It could be that a vacuum hose has a crack or came loose.
Keep us posted
It's odd to think that the MAF sensor would dirty, most filtration systems prevent this, even oiled filters. It could be a bad MAF sensor perhaps. Tap the MAF with the handle of a screwdriver while the engine is idling and see if it stumbles.
Like mentioned above, do physical inspection too. It could be that a vacuum hose has a crack or came loose.
Keep us posted
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Unless you dig in and start systematically looking for air leaks. We can GUESS what it is all week long without point out the exact problem area.. That’s the FIRST and most logical place to start.Go and look for any place that allows un-metered air into the engine. Any ducting between the MAF and TB and ALL the vacuum lines and fittings. Especially the PVC system hoses and fittings.
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,216
Likes: 1
From: westminster California
I heard a hissing noise under the hood. Investigated and it turned out that of two my hoses and the rubber boot on the alternator wire were all chewed up by mice or something. Had some trees removed this week along with bushes I guess some mice had their home disurbed. The car usually sits in the driveway and it sat for two days dont know how long this has been going on though. Taped up vacum hose going to master cylinder and no more codes drives fine now. The chewing looks nasty though on those two hoses.
Tech Contributor
Joined: Jan 2007
Posts: 19,361
Likes: 1,128
From: Dyer, IN
I heard a hissing noise under the hood. Investigated and it turned out that of two my hoses and the rubber boot on the alternator wire were all chewed up by mice or something. Had some trees removed this week along with bushes I guess some mice had their home disurbed. The car usually sits in the driveway and it sat for two days dont know how long this has been going on though. Taped up vacum hose going to master cylinder and no more codes drives fine now. The chewing looks nasty though on those two hoses.
Burning Brakes
Joined: Mar 2010
Posts: 1,189
Likes: 4
From: Freeport, FL
Glad you found the problem
