Forum: C4 ZR-1 Technical Postings
07-27-2023
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Replies: 4
Views: 570
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Forum: C4 ZR-1 Technical Postings
07-27-2023
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Replies: 4
Views: 570
Re: Air Con Pressure Cycling Switch 10007057
Thanks! The only one on ebay.com is $90 for a used switch. I was hoping to find a new switch as I don't want to risk having to de-gas and re-gas the system twice if I find the 'new' used switch...
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Forum: C4 ZR-1 Technical Postings
07-26-2023
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Replies: 4
Views: 570
Air Con Pressure Cycling Switch 10007057
I am trying to locate an air con pressure cycling switch, GM 10007057, AC Delco 15-2352. I am having trouble finding anyone who stocks it and was wondering if someone in the Registry might be able...
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Forum: C4 ZR-1 Technical Postings
08-29-2022
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Replies: 3
Views: 533
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Forum: C4 ZR-1 Technical Postings
08-29-2022
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Replies: 3
Views: 533
Dual Mass Flywheel interchangeability
I've been asked whether a 1989 L98 dual mass flywheel is interchangeable with a ZR-1 flywheel. I do not know the answer, although I can see that the GM part numbers are different - 10174481 for the...
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Forum: C4 ZR-1 Technical Postings
07-20-2022
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Replies: 8
Views: 619
Re: Transmission won?t go into gear
One easy check to make is to ensure that the clutch pedal and brake pedal are at the same height when looking at them with the drivers door open. If the clutch pedal is noticeably sitting lower than...
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Forum: C4 ZR-1 Technical Postings
06-29-2022
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Replies: 9
Views: 649
Re: Clutch pedal not to floor
Normally, the clutch pedal and brake pedal will sit at approximately the same height. If the clutch pedal stops 3/4 of an inch before hitting the floor, when released it should sit 3/4 of an inch...
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Forum: C4 ZR-1 Technical Postings
06-23-2022
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Replies: 15
Views: 1,356
Re: Overheating issues.
It may be worth checking that the flow of the coolant has not been modified by a previous owner, for whatever reason. I say that as I do not recognise the 3 photos that you included in your first...
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Forum: C4 ZR-1 Technical Postings
06-12-2022
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Replies: 18
Views: 1,617
Re: Radio antenna cable
Just tucked in beneath the trim panels above the left rear speaker
Sent from my iPad using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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Forum: C4 ZR-1 Technical Postings
06-12-2022
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Replies: 18
Views: 1,617
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Forum: C4 ZR-1 General Postings
06-05-2022
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Replies: 26
Views: 3,192
Re: Secondaries
Both my 1990 ZR-1's have working secondaries, which I intend to retain. My black car has run 11.7 / 118 in the quarter after having the plenum and injector housings ported, but retains the...
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Forum: C4 ZR-1 Technical Postings
04-15-2022
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Replies: 7
Views: 682
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Forum: C4 ZR-1 Technical Postings
03-24-2022
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Replies: 6
Views: 811
Re: 1990 Bose Radio CD Cassette unit not working
I ended up using United Radio in New York. They were the only Company that I emailed who replied to me! Overall they were very helpful with great communications. The price was good and they...
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Forum: C4 ZR-1 Technical Postings
03-23-2022
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Replies: 5
Views: 802
Re: Code 36 Fault Issue & Rough Idle
It's hard to see a link between fitting a BB cat back exhaust and a code 36. The 1990 Corvette Service Manual has a good diagnostic check for a code 36 on page 6E3-A-56 and 57.
Sent from my...
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Forum: C4 ZR-1 Technical Postings
03-02-2022
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Replies: 24
Views: 2,439
Re: Need your ideas - LT5 won?t turnover
So, the clutch pedal needs to be depressed to the floor before disengaging. A few suggestions spring to mind.
The most obvious one is whether the clutch hydraulics have been successfully bled to...
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Forum: C4 ZR-1 Technical Postings
02-19-2022
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Replies: 25
Views: 2,080
Re: Fuel Injectors
Yes, these are orange top Bosch / Ford injectors. Thanks for your input - I plan to install them on Monday!
Sent from my iPad using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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Forum: C4 ZR-1 Technical Postings
02-19-2022
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Replies: 25
Views: 2,080
Re: Fuel Injectors
Thanks for the feedback. I have just taken delivery of the South Bay fuel injectors and have carried out a quick check using the Kent Moore J39021 Injector Tester. The stock OEM injectors for the...
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Forum: C4 ZR-1 Technical Postings
02-17-2022
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Replies: 25
Views: 2,080
Fuel Injectors
I realise that much has been written about the best injectors for the LT5's. Many comments suggest that the FIC injectors are really good, also Accel injectors.
Has anyone any experience of South...
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Forum: C4 ZR-1 Technical Postings
02-13-2022
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Replies: 24
Views: 2,439
Re: Need your ideas - LT5 won?t turnover
It sounds as though the problem is linked to the Clutch Safety Switch, in particular the Clutch Neutral Start Switch Rod. As it can be difficult to bleed all the air from the clutch hydraulics after...
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Forum: C4 ZR-1 Technical Postings
01-27-2022
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Replies: 2
Views: 461
Re: Tech 1 connection to laptop
Thanks Subfixer - Any help would be appreciated! The only info that I have been able to establish (through the relevant Tech 1 manuals) is that the Baud Rate is 9600 bps. This can be altered on the...
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Forum: C4 ZR-1 Technical Postings
01-26-2022
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Replies: 2
Views: 461
Tech 1 connection to laptop
Hi - I am struggling to connect my Tech 1 to a laptop. I wish to do this so I can analyse and print Tech 1 data. My Tech 1 has an RS232 interface port on the left side of the unit just to the left...
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Forum: C4 ZR-1 Technical Postings
01-18-2022
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Replies: 20
Views: 1,364
Re: Hot start misses bad
Another possible cause may be an intermittent fault in the crank sensor caused by being situated right next to a hot header with no circulating air to cool it. Once on the move again, air circulates...
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Forum: C4 ZR-1 Technical Postings
01-16-2022
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Replies: 20
Views: 1,364
Re: Hot start misses bad
Hi - Your comments regarding the fact that the misfire moves around cylinders sounds as though it could point to an ECM / Engine Ground issue, maybe a loose Ground which only presents under certain...
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Forum: C4 ZR-1 General Postings
12-24-2021
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Replies: 139
Views: 38,270
Re: Delamination Poll
16979
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Forum: C4 ZR-1 General Postings
12-24-2021
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Replies: 139
Views: 38,270
Re: Delamination Poll
As an interesting aside, the last numbers of my ZR's VIN number appear through the delamination on the top of the driver's side, number 2391. It's a 1990 car.
Sent from my iPad using ZR-1 Net...
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