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10-19-2019
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#11 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,707
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Re: Code 43
And u’ve checked for continuity between the harness connector and the ECM?
Separate the harness connector from the clip to see if there’s any corrosion? Same on the ECM side?
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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10-19-2019
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#12 | |
 
Join Date: Sep 2018
Location: Groton, CT
Posts: 382
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Re: Code 43
Quote:
Correct voltage from the ECM at the knock sensor connector. No corrosion. ECM connections clean. Sometimes, the car will run all day without any issues. Other days, I'll get a code 43 as soon as it goes into closed loop, although the code is coming up more frequently than in the past. I know the car is 27 years old, but it only has 23K miles on it and was garage kept the entire time.
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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 |
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10-19-2019
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#13 |
 Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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Re: Code 43
Just curious...how can you say it's "running" great with no secondaries. Back when I had Barney, if I was driving around with inoperative secondaries, I'd be saying, "This car runs like crap."
 Ok...so we know it's not a problem with Haibeck's cal as the OP swapped out the chips and there was no change. We know it's not the sensor because that's been changed. Does the sensor installed have "plumber's tape" or anti-seize lubricant on the threads? If so, remove the sensor, clean the threads on the sensor and in the block, reinstall the sensor and road test. If that doesn't solve the issue, do the diagnosis procedures in the Service Manual. You will need a scan tester which supports the LT5 to run that diagnostic.
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
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10-19-2019
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#14 | |
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Join Date: Sep 2018
Location: Groton, CT
Posts: 382
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Re: Code 43
Quote:
If you mean it falls flat at 4000 rpm, then yes, it runs like crap. I've got the TunerPro RT program to do some data logging, I just have to figure out how to use it.
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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 |
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