engine cutting in and out
Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
engine cutting in and out
Ok well left work for lunch today...while i was buckling i felt a engine stumble was missing a little....did it a few times then quit...could see the rpm drop to 500 and resume normal idle....after i started up at hardees same thing....now a few hours later after work i started it up to go home...same...missing....went to pull away and the car jerked real bad (this was during my clutch release) almost acting like a fuel related issue. and continued to do this through my ride to autozone and then back home.....I think Im going to get a new fuel filter and replace that...went to autozone and got some fuel system cleaner and filled up on gas...hoping maybe it was bad gas because i put 10bux in gas in it yesterday and it never did it before today....same thing after fillup on the way home......also threw to p0102s on the way home....not sure why....never threw any misfire codes.....now the engine is not constantly missing or anything sounds normal at idle when not missing and get a few RPMs in it and it clears up sooooooo
anybody have any of these symtoms before? Hook me and my daily driver up
anybody have any of these symtoms before? Hook me and my daily driver up
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
Most probable cause is secondary ignition ( wires and plugs). First thing to do is to make sure all the plug wires are in good shape and on the coil and spark plug correctly.
How many miles are on your plugs and wires?? Are they clean and tight??
BC
How many miles are on your plugs and wires?? Are they clean and tight??
BC
Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
maybe 1500 miles on the plugs and wires....never had an issure until today
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
You should make SURE that each wire is properly connected to the spark plug and coil tower. They usually pop off the tower but can also pop off the the plug. Either one will cause a miss.
Try and listen for arcing . Put the car in a DARK area and see if you can see any arcing.
BC
BC
Try and listen for arcing . Put the car in a DARK area and see if you can see any arcing.
BC
BC
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
When it falls on it face, see if any of the gages on your IPC cycle (sweep) or jump. The reason I mention this is the ignition switch can cause this issue. Something to keep an eye on.
BC
BC
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
Check this thread, particularly post #9. I know the post is about a different DIC code, but your symptoms are very similar. I read this awhile back and went out to look at my '04 and guess what! Had I not looked at it, I would have had problems eventually.
http://www.digitalcorvettes.com/foru...threadid=38483
http://www.digitalcorvettes.com/foru...threadid=38483
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Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
what symtoms would be a maf failure...i got the p0102s like 4 times in the last 2 days....replace the fuel filter and regulator today...planned on doing this anyways and it didnt help....it stumbles much worse right after start up.....didnt have the problem at all when i started it drove to the dealer got my fuel filter and was on the way to the shop to work on it...threw a p0102 and starts stumbling immediately after it threw the code
Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
well I took the maf and **** out....maf didnt appear to be dirty? Should i buy the maf cleaner at autozone and clean it anyways i have no clue with a dirty maf looks like but it doesnt appear to be dirty?....While i got the crap off im going to clean my K&N...It was gross...guess i should check that more often....for ****s pulled a plug and it looked fine....who knows maybe the maf is failing...only reason i think this may be true is because of the maf p0102 codes i keep throwing.........anymore ideas are welcome...hope its not my fuel pump....dont know why but it clears up with rpms.....it usually only occurs after startup for the first few minutes......help guys
Le Mans Master
Joined: Nov 2002
Posts: 7,179
Likes: 2
From: Charlotte, NC
Here is an idea.. disconnect the MAF, the car should still run but will be using speed density (MAP sensor) if the problem seemes to cure it's self other then the check eng. light and a maf code.. I'd say you may need a new MAF. Also I would check for air leaks between the MAF and intake. Just some thoughts..
-=Rick
-=Rick
Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
Here is an idea.. disconnect the MAF, the car should still run but will be using speed density (MAP sensor) if the problem seemes to cure it's self other then the check eng. light and a maf code.. I'd say you may need a new MAF. Also I would check for air leaks between the MAF and intake. Just some thoughts..
-=Rick
-=Rick
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I've heard lots of times where the coolant temp sensor will cause severe problems for the engine should it go bad. Another possibility is the PVC valve and its connection tube to the intake. It can and will develop holes in the tube and in my case, out of sight on the bottom. It was only causing the engine to stumble upon taking off from a light and idling issues. You might have more than one item contibuting to your issues which would complicate things by far. Did you check the ground wires on the rear of the driver's side head?
Thread Starter
Melting Slicks
Joined: Jan 2008
Posts: 2,394
Likes: 0
From: Goldsboro NC
ok just got back from the parts store funny you mention pcv valve picked up one im going to replace that..cleaning my K&N as we speak since i had it out....it was nasty...also bought a can of MAF cleaner.....cleaning that and will reassemble once my K&N is ready....didnt check any grounds...they should be fine, i never removed the heads but will in 2 weeks for my HC swap wish me luck
