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

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Old Dec 18, 2017 | 07:11 PM
  #21  
ValourUnbound's Avatar
ValourUnbound
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From: Portland OR
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Originally Posted by WVZR-1
I'd think that the CODE 42 is most likely NOT the knock sensor or related and I'd do the actual diagnostics for the trouble code. It's an EST code so ...
That was just because I was in the area and could have knocked (ha) it. The car did not have the CE before I replaced the starter.
I will be working through the flowchart now that I've confirmed that I didn't break the knock sensor/cable.


Originally Posted by WVZR-1
Did you do anything with NAPA for maybe a correct starter?
Not yet, though when I check their website it seems to be a mess. I select my car, search starter and of the ten starters that appear, four of them could not possibly work, while the one I was given says that it only "may fit" by vehicle.

When I search the first number you gave me, 1998400,
I find this: https://www.napaonline.com/en/search...rm-interchange
At the bottom of that page, I can see the P/N I got, NAE 76016.


Originally Posted by ihatebarkingdogs
I'm not sure about an 84, but in 85-89, the other end of the knock sensor wire is at the knock-amplifier which is on a bracket attached to the HVAC blower housing. Can be seen looking at the side of the car with the hood up. Blue wire.
Thanks, I think I found it Same place on the 84.

Originally Posted by ihatebarkingdogs
Code 42 is almost always associated with the "set timing" connector being unplugged, loose, or code not cleared after checking the timing. Knock sensor code is 43.
I'll double check and make sure I have 42. I'd like to think I can count to 5, but some days...

I did find the set timing connector on the driver side, black/brown cable. I unplugged/plugged it and saw no difference (disconnected the battery inbetween).

My next steps are:
  1. Confirm CE 42
  2. Check set timing connector/wire.
  3. Work through correct flowchart, depending on the code I find.

Thanks for all the help guys, hopefully I/we can solve this soon
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Old Dec 18, 2017 | 10:19 PM
  #22  
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ValourUnbound
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Well I went to check the code tonight. I disconnected the battery for a few minutes before, just to make sure it wasn't a hold over. I also disconnected, checked the impedance and reconnected the set timing cable (before reconnecting the battery).

No codes.

I have no idea what I did to cause or to fix the code.
I fully expect it to come back as soon as all four tires are on the ground again, just because.
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