Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 39
Views: 1,572
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 11
Views: 1,658
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
4 Weeks Ago
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Replies: 10
Views: 1,348
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
4 Weeks Ago
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Replies: 8
Views: 1,020
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
4 Weeks Ago
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Replies: 10
Views: 839
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
4 Weeks Ago
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Replies: 2
Views: 784
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
4 Weeks Ago
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Replies: 2
Views: 784
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 10
Views: 839
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
4 Weeks Ago
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Replies: 7
Views: 1,862
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 8
Views: 1,020
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: 1,596
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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Forum: C4 ZR-1 Technical Postings
04-19-2024
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Replies: 7
Views: 1,355
Re: Horn won't blow
First check you have power at connector. If so scrape and clean the round swaged electric connection on the horn. Solder between the two. That press connection has eroded and lost continuity. I have...
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Forum: C4 ZR-1 Technical Postings
04-14-2024
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Replies: 5
Views: 1,596
Re: Help with no start PLEASE.
Use a mirror to confirm sensor is against the block
Confirm sensor is completely snapped into connector
Confirm fuel pressure is to spec. Likely your primary fuel pump went bad.
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Forum: C4 ZR-1 Technical Postings
04-03-2024
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Replies: 7
Views: 724
Re: Fuel Pressure Problem
And one ft of hose can set you back 30 bucks. It is available on Amazon. Get high pressure clamps too. Not the low pressure screw on the side type.
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Forum: C4 ZR-1 General Postings
04-02-2024
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Replies: 5
Views: 1,023
FL to MR10 caravan invite
Three of us are meeting in Jacksonville, FL the morning of Sunday May 5 to caravan to MR10. If anyone is interested let me know for details. The route is JAX FL to Augusta GA, take Moonshiner 28 to...
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Forum: C4 ZR-1 Technical Postings
03-29-2024
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Replies: 5
Views: 715
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Forum: C4 ZR-1 General Postings
03-24-2024
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Replies: 4
Views: 565
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Forum: C4 ZR-1 General Postings
03-01-2024
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Replies: 12
Views: 1,096
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Forum: C4 ZR-1 Technical Postings
02-28-2024
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Replies: 7
Views: 630
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Forum: C4 ZR-1 General Postings
02-26-2024
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Replies: 12
Views: 1,096
Re: New Tires
Mickey Thompsons are made in China. Remember that any all season tire has a harder rubber compound for longer life and are not a high traction high-performance tire. 300 treadwear seems to be the...
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Forum: C4 ZR-1 General Postings
02-23-2024
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Replies: 1
Views: 364
Kudos to Mark Horner for HOTB bearing article
After MR8 and the following Gathering at BG I drove home with complaining rear wheel bearings. Replaced them both with Moog. After MR9 I did a LOF and checked the car over. Front left wheel bearing...
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Forum: C4 ZR-1 General Postings
02-23-2024
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Replies: 12
Views: 1,096
Re: New Tires
Mickey Thompson Street Comp have done well for me on highway and on track. They did great after a big rain on the NCM track in 2022. I auto cross with confidence on full brake and turn in. Their...
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Forum: C4 ZR-1 General Postings
01-04-2024
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Replies: 8
Views: 1,189
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Forum: C4 ZR-1 Technical Postings
01-01-2024
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Replies: 37
Views: 11,259
Re: Oil Pressure Switch
I bought two oil pressure switch sockets on Amazon. Cut them and welded them to be deep enough to go over that TALL sensor.
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Forum: C4 ZR-1 Technical Postings
12-08-2023
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Replies: 4
Views: 1,996
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