Stumbles when accellerating hard
Thread Starter
Intermediate
Joined: Jan 2008
Posts: 32
Likes: 0
From: Texas
Stumbles when accellerating hard
I have a 97 6M, that drives like a champ until I get put the pedal to the floor, that when it stumbles (well below red line) like it is hitting the rev limiter. I just changed plugs and wires to correct this, but the problem still exists. Any ideas?
Racer
Joined: Feb 2007
Posts: 431
Likes: 5
From: Chico CA
Traction control? That's the obvious guess, though your post doesn't indicate what you're doing beyond standing on the gas. Traction control works by de-powering the engine, so you get a stumble.
That's my best guess. If you're under hard acceleration, and losing traction, try turning TC off with the button on the console. Easy check, and if that's it, well, you have a cheap answer.
Good luck!
That's my best guess. If you're under hard acceleration, and losing traction, try turning TC off with the button on the console. Easy check, and if that's it, well, you have a cheap answer.
Good luck!
Racer
Joined: Feb 2007
Posts: 431
Likes: 5
From: Chico CA
There are some clever folks on this forum. Maybe a better one will jump up. For me, I like the plug check. My Shelby had this little problem, just like you're describing. Turned out the plugs were gapped way wrong. That was enough. New engine, too. I just got in a hurry (or got sidetracked) and forgot to check the gaps before installing. Regapped, and as Mazda says, zoom zoom zoom.
Good luck. If no codes, it's probably something pretty straightforward. Oh, if the plugs are too light, you may be running lean. That will cause the symptom you're seeing, too. Do check the codes - there are instructions here on the forum, for just a quick search ("read codes" or something similar).
I rented a new Shelby last year. When it ran up against the rev limiter or the traction control, it stumbled just like you describe. Just went out and got into my car a little - second gear and the trac control did it again. It was a guess, but one I've seen personally.
I'll keep looking for your results.
Intermediate
Joined: Oct 2005
Posts: 35
Likes: 0
What codes are you throwing if any?
It could be a lot of things. Such as a knock sensor, or many other things.
Here is a link on how to read your codes if you don't already know:
http://www.97vette.com/howto/codes/index.html
It could be a lot of things. Such as a knock sensor, or many other things.
Here is a link on how to read your codes if you don't already know:
http://www.97vette.com/howto/codes/index.html
Former Vendor
Joined: Jun 2002
Posts: 2,045
Likes: 3
From: Bridgewater Ma
Could be anything.You need someone to scan it while driving.I've seen alot of older cars have bad MA meter's which will do this or you could have a bad coil. If I had my scanner on it I could tell you in less than 5 minutes.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Take a look and see if the PCM has posted any codes ... if you don't know the procedure, go here ....
https://www.corvetteforum.com/techti...D=26&TopicID=1
Be sure to post the entire code, such as P0300C
I'd also check for any air leaks between the MAF (located above the radiator) and the throttle body (located on the front of the engine). Air leaking in is "unmetered" air, and will cause the engine to run lean, making it feel like it is stumbling. It may be that the higher vacumn at WOT is opening up the "leak". Main thing, though, check for codes.
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