C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1987 L98 Code 33,34, and 43?

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Old May 3, 2024 | 07:50 PM
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Default 1987 L98 Code 33,34, and 43?

Ive been having some idling issues with my car for a while now. I tested to see if it was the MAF by disconnecting it and seeing if the car ran better without it. It didnt. So when a code finally showed up on my dash I saw code 34 and decided to replace the burn off relay.

Replaced that and the code went away. Flash foward a month or two and my car starts to die out in the middle of the road. The idle will slowly die out and then wont start. When i try to turn the ignition the antilock and parking brake light will turn on and i cant even pull out my key. And i have to sit there for a minute until it will start up again.

Today it happened for the third time. The second time in a week. I think it’s the other relay right next to the burn off relay that i meant to replace while i was in there but forgot to buy another one.

Checked the codes when i managed to get home and now its showing 33 and 43 im pretty sure the 33 is the relay im thinking of but i dont know what the “knock” sensor is.

Could the knock sensor have gone off because of the rough idle caused by the bad MAF relay? I want to make sure i got the right solution. Are their any more tests i can do to further narrow down my issue?

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