Forum: C4 ZR-1 General Postings
1 Week Ago
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Replies: 22
Views: 1,587
Re: Gathering 2025 and MR11
I just made reservation for Tom and I. We will be attending MR11 as well. These days it seems Quasar only gets out in May. But when May comes, she gets a LOT of attention. Looking forward to late...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 12
Views: 5,362
Re: starter rebuild kit
Different starter design than a SBC. Contact is L shaped. Yes I did rotate them on SBC back when young and broke in 70?s and 80?s. No longer young and no longer broke but yet fix stuff rather than...
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Forum: C4 ZR-1 Technical Postings
3 Weeks Ago
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Replies: 12
Views: 5,362
Re: starter rebuild kit
File the contacts to remove carbon deposits. I even use a die grinder stone on my battery drill to shine them up. The starters seem to require it at 30-40k miles of use.
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 27
Views: 6,259
Re: Dreaded no start
I file off the carbon tracks to shiny copper and reinstall. Good for another 35,000 miles.
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Forum: C4 NCRS for ZR-1s
09-10-2024
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Replies: 5
Views: 3,318
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Forum: C4 ZR-1 Technical Postings
07-20-2024
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Replies: 5
Views: 5,973
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 8
Views: 3,891
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 8
Views: 3,891
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 11
Views: 10,735
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 4
Views: 5,247
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 10
Views: 8,340
Re: 1991 ZR1 - Rack and pinion assembly
Trevor,
Most likely the rack is fine and the play is within the inner tie rod that threads onto the rack. Rockauto DORMAN IS200PR.
Rear wheel bearings usually make noise but not uncommon for...
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 17
Views: 9,538
Re: Question on Engine Temp
Tape some thick paper to end of something and slide it down there slowly. Like clothes pinning a baseball card to make noise on bicycle spokes when I was a kid. Or was I the only one that did that?
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Forum: C4 ZR-1 Technical Postings
07-19-2024
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Replies: 8
Views: 3,891
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
06-22-2024
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Replies: 6
Views: 4,176
Re: WTB: Secondary Port Solenoid
Standard Motor Products VS124
I have experienced that frustration. I went to OReileys with my vacuum tester in hand. I tested them on the counter until one held vacuum. Also RTV the connector.
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Forum: C4 ZR-1 Technical Postings
05-29-2024
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Replies: 39
Views: 25,461
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Forum: C4 ZR-1 Technical Postings
05-15-2024
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Replies: 11
Views: 16,671
Re: 1990 AC question
There are kits out there.
New compressor
New dryer
New expansion valve
New Schroeder valves and O rings throughout.
All lines and condensor and evaporator have to be thoroughly flushed because...
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Forum: C4 ZR-1 Technical Postings
05-15-2024
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Replies: 10
Views: 12,873
Re: Radio will not work
When these 30 year plus components fail I prefer to do this,
Remove head unit in dash
Remove CCM inside dash under glove box, bad PIA
Remove all 4 speaker units
Send them all to the nearest...
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Forum: C4 ZR-1 Technical Postings
05-14-2024
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Replies: 10
Views: 12,220
Re: High idle
Quote from service manual
Incorrect minimum idle speed may be caused by foreign material accumulation in the throttle, bore caulking, on the throttle valve, or on the throttle shaft.
Also a...
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Forum: C4 ZR-1 Technical Postings
05-13-2024
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Replies: 10
Views: 14,880
Re: Transmission or clutch ?groan? sound?
It was a squealing groan with clutch suppressed when cold. Figured it was throw out bearing or flywheel/ main shaft bushing. Most likely the latter. Hasn?t done it for 5 years. Returned from...
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Forum: C4 ZR-1 General Postings
05-13-2024
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Replies: 2
Views: 2,292
Re: MR10 and Gathering pics
1 and 2 at Charlotte Motor Speedway. Note rain.
3 and 4 at cabin of Jay Zeigler who purchase an un-Z with non operational secondaries. Donna is now the REV limiter!
5 is a very small glimpse of...
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Forum: C4 ZR-1 General Postings
05-13-2024
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Replies: 2
Views: 2,292
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Forum: C4 ZR-1 Technical Postings
05-13-2024
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Replies: 10
Views: 14,880
Re: Transmission or clutch ?groan? sound?
77 k miles. Original clutch. I had those noises a while back but went away. Don?t fix what is not yet really broke. Moana and groans are every time I try to get out of my Z!
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Forum: C4 ZR-1 Technical Postings
05-13-2024
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Replies: 7
Views: 10,901
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Forum: C4 ZR-1 Technical Postings
05-13-2024
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Replies: 10
Views: 12,220
Re: High idle
Buy throttle body cleaner spray. Remove accordion. Spray clean all well. Especially the little plate. Remove aluminum cover over cable. Spray all the mechanism with spray. First idea is grime...
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Forum: C4 ZR-1 Technical Postings
04-27-2024
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Replies: 5
Views: 9,151
Re: Help with no start PLEASE.
See the STICKIES about no start and read up. Get a fuel pressure gauge to see what you have. Both fuel pumps run for a bit to start the engine. Then the secondary pump goes off. If primary pump is...
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