1994 LT1 Nightmare
Thread Starter
Intermediate
Joined: Jun 2025
Posts: 37
Likes: 1
1994 LT1 Nightmare
Okay, LT1 with 56k miles. I recently had an opti problem so I have new plugs, wires, opti, water pump, cleaned throttle body and IAC valve, and replaced intake manifold gasket and a bunch of of vacuum lines. Lately, I have been chasing this idle surge that happens at idle, local corvette guy said it’s most likely clogged fuel injectors but the car runs great other than idle so not sure. something happened this morning. I’ve been getting an H41 code for a few months now, as long as that idle surge has been there. This morning, I was doing a decently hard pull and then the car shut off. Checked the codes and holy ****. H41, H54, H16, H48, H36, and H72. Is my ECM fried? What should I check. Car started immediately after and drove fine.
Thread Starter
Intermediate
Joined: Jun 2025
Posts: 37
Likes: 1
Thread Starter
Intermediate
Joined: Jun 2025
Posts: 37
Likes: 1
Okay, LT1 with 56k miles. I recently had an opti problem so I have new plugs, wires, opti, water pump, cleaned throttle body and IAC valve, and replaced intake manifold gasket and a bunch of of vacuum lines. Lately, I have been chasing this idle surge that happens at idle, local corvette guy said it’s most likely clogged fuel injectors but the car runs great other than idle so not sure. something happened this morning. I’ve been getting an H41 code for a few months now, as long as that idle surge has been there. This morning, I was doing a decently hard pull and then the car shut off. Checked the codes and holy ****. H41, H54, H16, H48, H36, and H72. Is my ECM fried? What should I check. Car started immediately after and drove fine.
