Intermittent Code 43.

[RSpengler]

I used the search, and nobody seems to know why this code comes on intermittently, Can somebody definitavely tell me what causes this code???? The memcal? I have a brand new knock sensor, torqued down to 14ft pounds, a brand new MSD distributor with brand new ICM, so the Memcal with the ESC circuitry seems like the only thing left... I've searched and found the diagnostics to do when you get the code, everything seems to check out fine (proper ohms, and circuitry through the blue wire) but I still get it intermittently. I even swapped in my spare ECU to see if that would cure it, (I dont have a spare Memcal, so I cant test that) and no dice. More often than not, my check engine light is on when I start my truck and goes away while driving only to return a few seconds to a few minutes later (obviously triggered by the code 43).... This can be a very bad situation, while the code is triggered no knock can be registered, thus full timing is applied, even if your detonating.
Thanks,
-Rob

 

[Bill Z]

Re: Intermittent Code 43.

My book mentions to check for loose fuel line around your knock sensor that could be riddling. Also check for anything loose that may male noise.