1990 ZR1 limp home mode (c41)
08-15-2017, 09:28 PM
#1
7th Gear
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1990 ZR1 limp home mode (c41)
Hi All,
1990 ZR1 owner here in Australia. The other day I got into start the car and I noticed, with the key on the radiator fan comes on. Start the car and it runs terribly and dies.
SES light is on continuously. When I tried to jump A to B the SES light does not flash. Jumping A threw 1- C41, H41, H74. Also 4 - Err
Am I correct to say that there is no communication with the ECM?
It just seems very odd that this could happen all of a sudden. Car has 20k miles
Perhaps maybe fuel pump? But I dont know if this would cause SES with key on.
Any help appreciated.
Thanks
Joel
1990 ZR1 owner here in Australia. The other day I got into start the car and I noticed, with the key on the radiator fan comes on. Start the car and it runs terribly and dies.
SES light is on continuously. When I tried to jump A to B the SES light does not flash. Jumping A threw 1- C41, H41, H74. Also 4 - Err
Am I correct to say that there is no communication with the ECM?
It just seems very odd that this could happen all of a sudden. Car has 20k miles
Perhaps maybe fuel pump? But I dont know if this would cause SES with key on.
Any help appreciated.
Thanks
Joel
08-16-2017, 08:21 PM
#2
Le Mans Master
Hi All,
1990 ZR1 owner here in Australia. The other day I got into start the car and I noticed, with the key on the radiator fan comes on. Start the car and it runs terribly and dies.
SES light is on continuously. When I tried to jump A to B the SES light does not flash. Jumping A threw 1- C41, H41, H74. Also 4 - Err
Am I correct to say that there is no communication with the ECM?
It just seems very odd that this could happen all of a sudden. Car has 20k miles
Perhaps maybe fuel pump? But I dont know if this would cause SES with key on.
Any help appreciated.
Thanks
Joel
1990 ZR1 owner here in Australia. The other day I got into start the car and I noticed, with the key on the radiator fan comes on. Start the car and it runs terribly and dies.
SES light is on continuously. When I tried to jump A to B the SES light does not flash. Jumping A threw 1- C41, H41, H74. Also 4 - Err
Am I correct to say that there is no communication with the ECM?
It just seems very odd that this could happen all of a sudden. Car has 20k miles
Perhaps maybe fuel pump? But I dont know if this would cause SES with key on.
Any help appreciated.
Thanks
Joel
08-18-2017, 12:16 PM
#3
Tech Contributor
Could be primary fuel pump failure. Unplug both pumps and swap the pumps around to the other pump and vice versa. If it runs as it should you lost the primary fuel pump. If not injectors could be an issue as well.