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Problem for Chevrolet 1998 C3500
1998 Chevy Silverado 3500 7.4 starts hard when warm
Recently purchased this vehicle and have replaced the fuel pump, spark plug wires and plugs, cap, and oil pressure sender. We have had it into the shop and on a computer but no codes come up. It acts like it is flooding when you try to start it while the motor is hot. I am at a loss. Thanks!
Comments:
Feb 11, 2009
- We tried changing the coolant temperature sensor but this did not fix the problem. If it sets for like 5 minutes after driving, you have to crank it about 15 to 20 seconds to get it to fire but it still acts like it is flooding and you can smell gas. If you shut it off and refire immediately, it takes right off. In addition to the above mentioned parts replaced we have also replaced the coil. It was on the computer again today and still no code. We are at a loss. Thanks!Solution #1
posted on Feb 10, 2009
I'd check coolant temperature sensor, it should be at center, front of engine. Not 100% sure on your vehicle, but on some I've worked on, the coolant temperature sensor was faulty, basically telling vehicle computer that engine was still cold, so dump more fuel.
Comments:
Feb 12, 2009
- I'd pull a couple or few spark plugs& start looking at plugs about 10-15 min after shutting it off, to see if they are wet. Have you tried leaving fuel pressure gauge on it when you shut engine off, just to see if fuel pressure is dropping?Yes
No
Solution #2
posted on Sep 20, 2009
Just did mine and it was the fuel pressure regulator, same exact symptoms you had.
Yes
No
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