Skiping and Sputting

CONNIE COUCH

MEMBER
CHEVROLET

I have a '96 Chev lumina car, 145k miles, about three weeks ago, I blew a head gasket and took it in for repair. When I got the car back at 25-35-40miles phr it is very slluggish and skips but once you get past that point will go very good. At about 60 mph is skips again but after 60 does not skip. I have taken the car to the shop every day for three weeks and they have no idea what is the problem, there are no codes. It runs fine starts fine, and idles fine. It was not running like this when I took it into the repair shop.

Could someone offer some help! I have spent all my money on this car and now they are telling me I need a fuel pump. I feel that it is unsafe to drive and really don't know what to do. :Cry:

3 Replies

CARUNDELL

MECHANIC
602 POSTS

Hey Connie,
Its very common for the O2 sensors to become contaminated w/ coolant (from when the head gasket blew) and not operate properly after repairs like that. Ask your tech to perform a test of the "front" O2's. Also ask him why he feels it may be the fuel pump (that seems odd to me as you can do highway speeds and not have an issue), is the pressure low? Is the fuel volume low? The more info you get the better off you are. When they did the heads, was it done correctly (heads sent to machine shop for resurface and other checks?) Where the tune up parts reused? Or replaced? Let me know!

Chris

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Wednesday, January 17th, 2007 AT 1:14 PM

CONNIE COUCH

MEMBER
2 POSTS

Carundell- thank you for the info! So, would the O2 censor make the car use alot of fuel and cause it the gas hand to wave back and forth. They supposed to have put "new" tune up parts in the car. What about the timing? Could that be off? NO the did not re-grind the heads or anything like that, where they suppose to? Connie-

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Wednesday, January 17th, 2007 AT 2:53 PM

CARUNDELL

MECHANIC
602 POSTS

Connie,
Faulty O2 will cause fuel consumption problems, but has nothing to do w/ the gauge. Timing is computer controlled and should not be an issue. It concerns me that the heads were not resurfaced. They are aluminum and warp very easy and need to be checked for cracks and resurfaced before installation. This may be part or all of the problem Since the work, has the check engine light come on or flashed at any time? I strongly recommend you stay on top of this shop until they get it right, they really should stand behind their work! Let me know!

Chris

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Wednesday, January 17th, 2007 AT 3:06 PM