Code 42 revisited - ZR-1 Net Registry Forums

Subfixer · 03-14-2020

As discussed in an old thread, I get random detonation, followed by the SES light, secondaries are inhibited. Code 43 comes up as the problem. No other codes are set.

I had previously installed a new knock sensor which did not solve the problem. All checks in the FSM are good. Car is stock except for Mark's chip. Problem is present with or without Mark's chip.

While working on a radiator swap, I figured I would pull the plenum and have another look at this problem.

I found the secondary vacuum valve was leaking by, so I put in a good one, and installed a new vacuum check valve also.

I checked the ignition module for bent pins, but found none.

Any clue as to where I should check next before I button this up?
I do have a spare used Ignition module if I need it.

Thanks

03-14-2020	#1
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 380	Code 43 revisited As discussed in an old thread, I get random detonation, followed by the SES light, secondaries are inhibited. Code 43 comes up as the problem. No other codes are set. I had previously installed a new knock sensor which did not solve the problem. All checks in the FSM are good. Car is stock except for Mark's chip. Problem is present with or without Mark's chip. While working on a radiator swap, I figured I would pull the plenum and have another look at this problem. I found the secondary vacuum valve was leaking by, so I put in a good one, and installed a new vacuum check valve also. I checked the ignition module for bent pins, but found none. Any clue as to where I should check next before I button this up? I do have a spare used Ignition module if I need it. Thanks __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige Last edited by Subfixer; 07-07-2020 at 07:16 PM.