1998 Chevy Camaro sudden engine stall

POLAR257

MEMBER
1998 CHEVROLET CAMARO
6 CYL
2WD
AUTOMATIC
115,000 MILES

When I start my car it starts off fine at 1,000 rpm, but after a min. Or so, the rpms automaticaly increase to 2,500 without me touching the peddle and then engine shuts off. But once I drive the car for a bit I never have a engine problem.

or if I dont warm up the car, and I gently acclerate my car shuts down, or hesitates to acclerate and I have to shift to Neautral and start back up again.

no codes come up, and i've taken it to a dealer and a regular mechanic no luck why it does that. I've cleaned the airfliter, cleaned out the air intake, and fuel filter, oil change, themostats. Even had my spark plugs replaced at the recommended milage and type of spark plug from the owners manual. And it still my car still stalls. Its been like this for while now, and to avoid it, I just let it idle to warm up. It never use to do that.

how can I solve this problem?

5 Replies

JDL

MECHANIC
16,098 POSTS

Hi, thanks for the donation, just speaking for myself, I'd have to check when the problem is ongoing. Was the vehicle warmed-up, when the dealership looked at it? Intermittent issues can be hard to track. Maybe a temp related problem? I'd want to see if vehicle is in open or closed loop, when the problem occurs? When the problem occurs, can you tell if system is running rich or lean? I'm sorry I can't point right at the problem, maybe the others will have some ideas? Just a thought, make sure electricals are turned off, when starting, like hvac. Also, try to see what the charging system is doing, when the idle is high, just a thought.

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Saturday, March 27th, 2010 AT 11:11 AM

POLAR257

MEMBER
3 POSTS

Here's the intresting thing, it ALWAYS does that in the begninng when you start the car the 1st time. Idles normal then after 2 min jumps to 2500 rpms and shuts off. Start it again you dont have the hesitation problems.

When I took it to the dealership they did notice the porblem once. And claimed it was fix, which they claimed the fix is to change my jets. Costed me a lot of money to do that. And I replaced them and little while later still started to rev up for a bit to 2500 rpms and shut off. I believe they must have playied with the computer idle speed. Not sure though?

My electricals are all solid, my hvac is turned off and it still happens where its on or off.

But when I take it in, they cant seem to see the problem since the car is already at warm temp. They tried to replicate it when its cold, and did see the problem. But had no idea had to solve it or least had the tools to fix it and refered me to the dealership. I got one maitence person saying I might have a blown piston?

Any other ideas would be a huge help to get my car back in order again?

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Saturday, March 27th, 2010 AT 2:56 PM

JDL

MECHANIC
16,098 POSTS

If they put a scanner on it, did you get the chance to see idle and required idle? I can't tell for sure, what is going on?

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Sunday, March 28th, 2010 AT 9:01 AM

POLAR257

MEMBER
3 POSTS

Yes. The requried idle was at a 1,000. The dealer at the time told me it was idleing a little low so they had it programmed to idle 1,200.

Would it be possible, the problems i'm having is from the massive air flow sensors? They are 10 years old, and looking up the symptoms they do share them.

As far as my car being rich or lean, its just at optium level, vaccum seals are at normal levels. I maen the majority of parts on the car are replaced except for the electronics.

I appreciate the input you have given me so far.

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Sunday, March 28th, 2010 AT 4:02 PM

JDL