1994 LT1 H43 Knock Sensor Circuit Code
Thread Starter
Intermediate
Joined: May 2020
Posts: 28
Likes: 0
From: Portland, OR
1994 LT1 H43 Knock Sensor Circuit Code
Hello, I have a 94' and after pulling codes I seem to have a H43 Knock Sensor code. I replaced the knock sensors around 4 months ago when I originally tried to fix the problem. I checked the wiring and it seems to be fine too. Is there a fuse I could check/ any other ideas?
Was also wondering if this problem could effect gas mileage as mine has been pretty bad.
Anyway, I appreciate any ideas, thanks.
Was also wondering if this problem could effect gas mileage as mine has been pretty bad.
Anyway, I appreciate any ideas, thanks.
Pro
Joined: Aug 2020
Posts: 647
Likes: 126
From: Liliha Bakery stuffing my face with coco puffs!
Don't want to stir you wrong as this is for a '95 and your '94 might be different...Idk what "checking the wiring" means but...
https://www.corvetteforum.com/forums...post1595459935
Although on a '90, had a solid code 43 and per the scanned data, no knock counts but spark retard everywhere. Felt severely under powered. Never drove it much to observe mpg. Had couple of PO self inflicted wires crossed.
https://www.corvetteforum.com/forums...post1595459935
Although on a '90, had a solid code 43 and per the scanned data, no knock counts but spark retard everywhere. Felt severely under powered. Never drove it much to observe mpg. Had couple of PO self inflicted wires crossed.
Le Mans Master
Joined: Aug 2015
Posts: 6,113
Likes: 1,994
From: St. Charles MO
It could affect the mileage if the engine is pulling timing advance due to false knock signals. 94 and 95 and should be identical, so definitely check out the thread that Stew linked.
2nd Gear
Joined: Jun 2024
Posts: 2
Likes: 0
HI I have a 95 Lt1. Started to have trouble from one moment to another with my AC, it didnt blow any air at all from 1 minute to the next one, so I wanted to take a look AC blower fuse and Mistakenly remove the ECM fuse. My car was driving really nice and smooth and after I remove that ECM fuse started to hace some trouble by accelerating and some knocking too.
what can I do next, Do you think I damage the knock sensors? Or is it just my engine going crazy for a bit and should go back to normal? I haven't drive it after that happened anymore... (4 days ago)
what can I do next, Do you think I damage the knock sensors? Or is it just my engine going crazy for a bit and should go back to normal? I haven't drive it after that happened anymore... (4 days ago)
