Corvette C4 Forum 1984 through 1996

Running Problem

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  #1  
Old 10-04-2006, 05:10 PM
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Default Running Problem

Alright here is the problem that I am having. Was driving the car the other day and the car acted like it had a mist. Then the car shut off. Had all kinds of trouble starting so then I was thinking it was the fuel pump. Figured out the car wouldnt start if was getting no fuel. Took the cover off the cross ram injector and u can see the fuel injecting into the carbs, but could hear air from what it sounded like comng from underneath the carbs so replaced that and the air sucking stopped. But only difference it made was the car stays running ececpt when u give it gas it shuts off. Do you guys have any ideas what u think it is? or something u want me to check and see and give more feedback.

thanks
 
  #2  
Old 10-05-2006, 09:31 AM
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Default RE: Running Problem

Have you checked fuel pressure, engine vacuum, and spark? Try to narrow it down. Fuel pressure could be pump, engine vacuum could be catylytic conv., spark could be coil, stator, cap or rotor.
 
  #3  
Old 10-05-2006, 11:01 AM
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Default RE: Running Problem

no didnt check those but will and will get back to you. thanks
 
  #4  
Old 10-12-2006, 08:52 AM
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Default RE: Running Problem

Alright replace the mod on the distr. all the plugs and wires gaskets under the carbs. new fuel pump. same problem no improvement. possiby the egr valve.
 
  #5  
Old 10-12-2006, 09:21 AM
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Have you determined what you are losing? Fuel, fire, or injector pulse? The shotgun approach to fixing cars gets expensive. Let me know what you are losing. [8D]
 
  #6  
Old 10-12-2006, 10:14 AM
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Default RE: Running Problem

Not losing fuel because u can watch the fuel being injected in the the carbs. I was thinking the egr bc when one of the guys was helping with work on the car squeeze the bottom on the egr the car acted normal so that is why I wanted to change that out? the idel came up and seem to wanna run right. what u think?
 
  #7  
Old 10-13-2006, 12:57 AM
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Default RE: Running Problem

That may be, but EGR will not shut the car off under throttle, mainly because that is when you get the valve opening. That is what I understood you to say, not at idle. Correct me if I am wrong.

"But only difference it made was the car stays running ececpt when u give it gas it shuts off. "
 
  #8  
Old 10-13-2006, 08:39 AM
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Default RE: Running Problem

well changed the egr and no change.
 
  #9  
Old 10-13-2006, 08:45 AM
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So you have fuel pulse from the injectors consistantly? Try an inline spark checker to see if you are dropping spark. You might be losing a coil, as what you described has the characteriscs of a weak coil.
 
  #10  
Old 10-13-2006, 03:22 PM
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Default RE: Running Problem

coil has been replaced. Made appointment to get it hooked up to the computer on tuesday. i'll let u all know.
 


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