Warmed up NO START?
#1
Warmed up NO START?
I just bought a 93 C4 corvette. it is stock. when the engine is cold and the first time i start it in the morning it starts fine. as soon as i go somewhere and stop (eat and come back) and try to start it, it just keeps cranking. i then hit the gas once and it starts right up. it does not stop at any time when i am driving. is this a normal occurrence on a 93? or what should i be looking for?
-thanks in advance
-thanks in advance
#3
Le Mans Master
Every time you stop do you have the problem of not being able to start it, or is it sometimes?
When you get in to start it after you have stopped, listen to the rear of the car for the fuel pump as you turn the key to ON (do not crank). If the pump does not run you may have a hard time starting.
Another possible cause is the ICM (ignition control module). It's a solid state device which can be temperature sensitive that drives the coil to make spark. They usually cause random problems and not routinely quite at the same place same time.
A problem like this is going to be hard to diagnose on the road. You may need to so some tests at home. I would get it hot, go home turn it off and check some items. I would check for spark, check fuel pressure and connect a noid light to the injectors to make sure they are being driven.
Hitting the gas under normal circumstances does not do anything for this engine. Unless your throttle position sensor (TPS) is no good. But I think that is probably doubtful. On this engine, holding your foot down will cut off the fuel for the injectors. This is only done if the engine is flooded. But that does not sound like the situation either.
I would make the basic checks and see what turns up.
When you get in to start it after you have stopped, listen to the rear of the car for the fuel pump as you turn the key to ON (do not crank). If the pump does not run you may have a hard time starting.
Another possible cause is the ICM (ignition control module). It's a solid state device which can be temperature sensitive that drives the coil to make spark. They usually cause random problems and not routinely quite at the same place same time.
A problem like this is going to be hard to diagnose on the road. You may need to so some tests at home. I would get it hot, go home turn it off and check some items. I would check for spark, check fuel pressure and connect a noid light to the injectors to make sure they are being driven.
Hitting the gas under normal circumstances does not do anything for this engine. Unless your throttle position sensor (TPS) is no good. But I think that is probably doubtful. On this engine, holding your foot down will cut off the fuel for the injectors. This is only done if the engine is flooded. But that does not sound like the situation either.
I would make the basic checks and see what turns up.
#4
Team Owner
Member Since: Mar 2001
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Basic checks means check for spark during cranking, check for fuel pressure (35-42 psi), check for fuel pressure holding for 1/2 hr ign off, use a noid light to see if injectors are being pulsed during cranking.
#6
Every time you stop do you have the problem of not being able to start it, or is it sometimes?
When you get in to start it after you have stopped, listen to the rear of the car for the fuel pump as you turn the key to ON (do not crank). If the pump does not run you may have a hard time starting.
Another possible cause is the ICM (ignition control module). It's a solid state device which can be temperature sensitive that drives the coil to make spark. They usually cause random problems and not routinely quite at the same place same time.
A problem like this is going to be hard to diagnose on the road. You may need to so some tests at home. I would get it hot, go home turn it off and check some items. I would check for spark, check fuel pressure and connect a noid light to the injectors to make sure they are being driven.
Hitting the gas under normal circumstances does not do anything for this engine. Unless your throttle position sensor (TPS) is no good. But I think that is probably doubtful. On this engine, holding your foot down will cut off the fuel for the injectors. This is only done if the engine is flooded. But that does not sound like the situation either.
I would make the basic checks and see what turns up.
When you get in to start it after you have stopped, listen to the rear of the car for the fuel pump as you turn the key to ON (do not crank). If the pump does not run you may have a hard time starting.
Another possible cause is the ICM (ignition control module). It's a solid state device which can be temperature sensitive that drives the coil to make spark. They usually cause random problems and not routinely quite at the same place same time.
A problem like this is going to be hard to diagnose on the road. You may need to so some tests at home. I would get it hot, go home turn it off and check some items. I would check for spark, check fuel pressure and connect a noid light to the injectors to make sure they are being driven.
Hitting the gas under normal circumstances does not do anything for this engine. Unless your throttle position sensor (TPS) is no good. But I think that is probably doubtful. On this engine, holding your foot down will cut off the fuel for the injectors. This is only done if the engine is flooded. But that does not sound like the situation either.
I would make the basic checks and see what turns up.
#8
Suckin' gas, haulin' ass.
Member Since: Apr 2010
Location: Newport News Virginia
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I had the same problem with my car. It ended up being the fuel injectors. What would happen is that when hot, the resistance on the injectors would go up when, and the computer would read it as out of spec and shut the injector drivers down.