Another question
Thread Starter
Cruising
Joined: Nov 2022
Posts: 13
Likes: 0
Another question
So I just replaced the fuel pump and now the car is running better, but now I've got misfires and some more smoke, I can give it gas but it still struggles bad and now randomly idles with a way high rpm help me please gosh
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
1) You need to check and see what's happening to the fuel pressure when the engine is cutting out or stumbling as the LT1 needs approx 40 - 42 psi for the fuel injectors to fire off.
2) You mentioned that you replaced the fuel pump but did you also replace the fuel filter located under the car on the passenger side?
3) Are you familiar with the paper clip method used to pull codes from the ALDL plug?
it would probably be a good idea to invest in a set of the 2-volume Factory Service Manual . Note that they are specific by individual year. You want the ones with the RED covers (final edition) not the white covers (preliminary edition). The FSM provides you with the diagnostic decision trees to hunt down the root cause of issues. For anyone who is going to keep and maintain their C4 ..... the FSM will save you $$$ over the long haul.
2) You mentioned that you replaced the fuel pump but did you also replace the fuel filter located under the car on the passenger side?
3) Are you familiar with the paper clip method used to pull codes from the ALDL plug?
it would probably be a good idea to invest in a set of the 2-volume Factory Service Manual . Note that they are specific by individual year. You want the ones with the RED covers (final edition) not the white covers (preliminary edition). The FSM provides you with the diagnostic decision trees to hunt down the root cause of issues. For anyone who is going to keep and maintain their C4 ..... the FSM will save you $$$ over the long haul.
Thread Starter
Cruising
Joined: Nov 2022
Posts: 13
Likes: 0
1) You need to check and see what's happening to the fuel pressure when the engine is cutting out or stumbling as the LT1 needs approx 40 - 42 psi for the fuel injectors to fire off.
2) You mentioned that you replaced the fuel pump but did you also replace the fuel filter located under the car on the passenger side?
3) Are you familiar with the paper clip method used to pull codes from the ALDL plug?
it would probably be a good idea to invest in a set of the 2-volume Factory Service Manual . Note that they are specific by individual year. You want the ones with the RED covers (final edition) not the white covers (preliminary edition). The FSM provides you with the diagnostic decision trees to hunt down the root cause of issues. For anyone who is going to keep and maintain their C4 ..... the FSM will save you $$$ over the long haul.
2) You mentioned that you replaced the fuel pump but did you also replace the fuel filter located under the car on the passenger side?
3) Are you familiar with the paper clip method used to pull codes from the ALDL plug?
it would probably be a good idea to invest in a set of the 2-volume Factory Service Manual . Note that they are specific by individual year. You want the ones with the RED covers (final edition) not the white covers (preliminary edition). The FSM provides you with the diagnostic decision trees to hunt down the root cause of issues. For anyone who is going to keep and maintain their C4 ..... the FSM will save you $$$ over the long haul.
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
Check this out:
http://www.corvettebuyers.com/c4vettes/codes.htm
http://www.corvettebuyers.com/c4vettes/ecm.htm
http://www.corvettebuyers.com/c4vettes/codes.htm
http://www.corvettebuyers.com/c4vettes/ecm.htm
