Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 7
Views: 1,105
Re: Starter Interrupt relay
My car is a 93 ZR-1 and it is different than the 1990 ZR-1. The relay is on page 8C-28 and is diagram 32. I looked online at Rock Auto and the part that you mentioned is different than what I see....
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 7
Views: 1,105
Re: Starter Interrupt relay
I don't have a part number. That's what I'm trying to find out. It located behind the driver side dash panel. It's a pain to replace.
Roy
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 7
Views: 1,105
Starter Interrupt relay
I've been going back and forth with this issue with my 93 ZR-1. When the starter interrupt relay gets hot, I can't start the engine. Does anyone have the GM part number for the relay and do they...
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Forum: C4 ZR-1 Technical Postings
05-01-2025
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Replies: 6
Views: 5,281
Re: Code 34 on 93 LT5
I got it fixed. The connection was loose and I put it back in. No codes. I can't believe that the auto shop couldn't fix it. They didn't have any experience with OBD 1.
Roy
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Forum: C4 ZR-1 Technical Postings
04-28-2025
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Replies: 6
Views: 5,281
Re: Code 34 on 93 LT5
I've had three ZR-1's so checking the MAP hose is standard with me. I've been under the weather for the week or so which kept me from checking it out. Hopefully, I can get back to working on it.
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Forum: C4 ZR-1 Technical Postings
04-21-2025
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Replies: 6
Views: 5,281
Re: Code 34 on 93 LT5
I don't have a Tech 1 or anything like that. The vacuum hose looked good when I replaced the MAP sensor. Code 34 looks to be about a short or not being grounded. After running the engine, I will...
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Forum: C4 ZR-1 Technical Postings
04-20-2025
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Replies: 6
Views: 5,281
Code 34 on 93 LT5
Earlie, I had a code 33, 45 and 65. I changed out the MAP sensor, disconnected the battery, ran the engine and checked the codes again. This time, I got a code 34 and the other codes disappeared. I...
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Forum: C4 ZR-1 Technical Postings
04-18-2025
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Replies: 10
Views: 5,551
Re: Looking for Oxygen sensors for my engine
Thank you for the responses. I contacted Marc Haibeck and he told me to get Bosch 13077 sensors for my LT5. Just waiting for a time to install then and see how that works. I suspect that these are...
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Forum: C4 ZR-1 Technical Postings
04-16-2025
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Replies: 10
Views: 5,551
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Forum: C4 ZR-1 Technical Postings
03-27-2025
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Replies: 0
Views: 4,757
Looking for diagnostic tools for 93Z
Back a long time ago, I bought a diagnostic kit with the Ode Decoder book from Gordon Killebrew. I have C-4's and it worked out great until I sold my 92 Z and it disappeared. I can't find it at all....
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Forum: C4 ZR-1 Parts For Sale / Wanted
03-24-2025
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Replies: 2
Views: 5,105
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Forum: C4 ZR-1 General Postings
01-16-2025
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Replies: 37
Views: 12,688
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Forum: C4 ZR-1 Parts For Sale / Wanted
08-24-2024
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Replies: 2
Views: 2,147
WTB: Fuse Puller for my 1993
Somehow, my fuse puller for my 93 Z has disappeared. looking to get another one. Does anyone have one or know where I get another one? Thanks.
Roy
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Forum: C4 ZR-1 NCRS Topics
07-09-2024
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Replies: 9
Views: 17,174
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Forum: C4 ZR-1 Technical Postings
06-26-2024
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Replies: 5
Views: 10,501
Re: Damage to front bumper
I'm okay but the car needs a little help. The shop that was recommended said to replace the whole bumper because they said that they didn't know how to work on plastic. That was weird. I guess metal...
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Forum: C4 ZR-1 Technical Postings
06-24-2024
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Replies: 5
Views: 10,501
Damage to front bumper
My Z was damaged because of a semi truck that came over the road on the center line and on a country road without any shoulder. I hit something and tore up the front part of the bumper. Is this...
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Forum: C4 ZR-1 Technical Postings
05-25-2024
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Replies: 3
Views: 13,394
Re: Air Filter Cover
FYI, heat gun won't work as the air filter covers for the all ZR-1's are metal not plastic. It's a degrading paint situation and the only way to fix it is to sand it down and repaint it. I was...
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Forum: C4 ZR-1 Technical Postings
05-22-2024
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Replies: 3
Views: 13,394
Air Filter Cover
I didn't notice this before but when I was replacing the cam emblems, I saw that the air filter cover was spotted like the surface was kinda rusting. I took a picture of it and I am posting it here....
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Forum: C4 ZR-1 Technical Postings
05-20-2024
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Replies: 7
Views: 13,475
Re: Cam Emblems Adhesive
Marc didn't tell me what he uses but I was sure that it wasn't RTK. RTV sounds a lot better.
Roy
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Forum: C4 ZR-1 Technical Postings
05-19-2024
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Replies: 7
Views: 13,475
Cam Emblems Adhesive
I bought some cam emblems from Marc and I need to find an adhesive for them. Marc said something about temperature around 225 degrees for the heat part of it but does anyone have a recommendation for...
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Forum: C4 ZR-1 Technical Postings
05-19-2024
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Replies: 2
Views: 12,055
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Forum: C4 ZR-1 Technical Postings
05-19-2024
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Replies: 2
Views: 12,055
Buffing Compound on front spoiler
Took my ZR-1 to a shop for detail work. I didn't notice it at the time until I got it in good light and saw that there was a white compound on the right front spoiler. I took back to the shop and, of...
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Forum: C4 ZR-1 General Postings
03-25-2024
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Replies: 4
Views: 2,604
Rear Lining screws.
I had to pull the right rear tire and discovered that 4 screws are missing from the liner. Anybody have a source or know of one where I can get replacement screws. I'm missing one on the left rear as...
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Forum: C4 ZR-1 General Postings
03-24-2024
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Replies: 2
Views: 1,921
Cam Emblems
Who has cam emblems for sale? I saw that my cam emblem is gone on my right cam cover and I would like to replace it. The other one looks kinda weak as well and so I would replace that one as well....
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Forum: C4 ZR-1 General Postings
03-05-2024
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Replies: 5
Views: 2,080
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