Forum: C4 ZR-1 Technical Postings
2 Days Ago
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Replies: 4
Views: 144
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 10
Views: 204
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 10
Views: 204
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Forum: C4 ZR-1 Technical Postings
1 Week Ago
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Replies: 3
Views: 166
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Forum: C4 ZR-1 Technical Postings
2 Weeks Ago
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Replies: 5
Views: 151
Re: Help with FX3 actuators/faults
Had a similar issue on my '90.
I removed each actuator, cleaned with WD40, applied a little silicone lube to the gears and put them back on.
Problem went away.
Crabs
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
4 Weeks Ago
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Replies: 6
Views: 267
Re: 1990 ZR1 ECM Needed
I had a very sililar problem some years ago. In my case it was caused by me back probing the injector pins at the ECM plug. Big no no.
https://zr1.net/forum/showthread.php?t=10828
Hope this helps.
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Forum: C4 ZR-1 General Postings
03-20-2024
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Replies: 1
Views: 128
Re: Speedometer issue
- The C4 Corvette with ZF6-S40 uses a pulse-signal-reference generated from the Vehicle Speed Sensor (VSS). The VSS, when equipped with a 15 tooth (T) drive gear (on output shaft) and 42T driven gear...
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Forum: C4 ZR-1 General Postings
03-08-2024
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Replies: 26
Views: 1,276
Re: A question for the longtime owners.
I've owned my '90 ZR-1 for over 20 years now.
In that time I've put less than 9,000 miles on it.
Every time I drive it I risk serious jail time.
That being said, it's the funnest car I've ever...
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Forum: C4 ZR-1 General Postings
02-13-2024
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Replies: 4
Views: 296
Re: New engine startup in restomod 62
Give Corey Henderson at Henderson Performance Automotive in New Braunfels Texas a call, hes the closest to you. Failing that I'd call Marc Haibec for advice.
Personally, i would just gut a wrecked...
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Forum: C4 ZR-1 Technical Postings
01-16-2024
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Replies: 3
Views: 298
Re: SYS Light on Dash
Usually means it's time to replace your battery.
It's a CCM code, means the battery is less than 12v.
Crabs
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Forum: C4 ZR-1 Technical Postings
01-07-2024
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Replies: 4
Views: 561
Re: Oil in Plenum
Jerrys Gaskets has all the PVC hoses in stock:
https://www.jerrysgaskets.com/pcv-system-emissions/
A little oil is ok, a lot would be indication that something isn't quite right.
Crabs
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Forum: C4 ZR-1 General Postings
12-30-2023
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Replies: 26
Views: 2,125
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Forum: C4 ZR-1 General Postings
12-24-2023
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Replies: 12
Views: 712
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Forum: C4 ZR-1 General Postings
11-27-2023
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Replies: 17
Views: 4,936
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Forum: C4 ZR-1 Technical Postings
09-23-2023
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Replies: 7
Views: 1,540
Re: No start help!!
Just in case it's not entirely clear, the ignition module is the device that lives on the bottom side of the plenum.
It's also known as the DIS module.
It has connectors in front and the back. It's...
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Forum: C4 ZR-1 Technical Postings
09-20-2023
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Replies: 9
Views: 1,379
Re: Blue/Black ZF6 labels
Don't forget that late model blue label have no reverse lockout ring on shifter, the have "crash through" reverse engagement.
Crabs
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Forum: C4 ZR-1 Technical Postings
09-07-2023
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Replies: 12
Views: 2,946
Re: Limits of stock LT5 with boost?
My guess would be that all things being equal, a stock configuration LT5 on boost, the most likely first failure would be head gaskets.
We already know the bottom end is bullet proof as evidenced by...
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Forum: C4 ZR-1 Technical Postings
08-31-2023
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Replies: 4
Views: 883
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Forum: C4 ZR-1 General Postings
08-28-2023
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Replies: 3
Views: 874
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Forum: C4 ZR-1 General Postings
08-14-2023
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Replies: 58
Views: 9,361
Re: ZR-1 History all "Jack'd" up...
If Ron could be encouraged to do another run, I'd be first in line to buy one, and just to sweeten the deal, I'd pay for half of Craigs replacement bottle.
TomC
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
07-13-2023
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Replies: 5
Views: 843
Re: WTB ABS Pump Relay, got a spare?
Mine failed a few years ago, research led me to the conclusion that they were made of pure unobtanium.
Further research indicated its a simple 12v relay, the only thing special is the case and...
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Forum: C4 ZR-1 General Postings
06-16-2023
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Replies: 9
Views: 1,409
Re: Repainting Throttle Body Cover
If i were to guess, I'd say he meant to polish your LT5 like he showed in the pic.
Polished motors are pretty for sure, but I'd yuess it takes a ton of rubbng.
Crabs
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Forum: C4 ZR-1 Technical Postings
06-10-2023
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Replies: 9
Views: 1,352
Re: Looking for LT-1 & LT-5 Specialist
LT1, likely plenty. check your local Chevy dealer, or pretty much any restoration shop.
LT5, uhh...nope.
Used to be a guy just across the border in Washington, but he evaporated long ago.
There...
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Forum: C4 ZR-1 General Postings
06-08-2023
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Replies: 4
Views: 1,041
Re: LT5-Powered 1958 Corvette Restomod
Is it my imagination, or did the builder forget to polish the throttle body (or was afraid to)?
Awesome looking car, but almost seems sacrilegious to restomod a '58.
So few survived, but as an old...
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Forum: C4 ZR-1 Technical Postings
05-10-2023
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Replies: 14
Views: 2,348
Re: Still chasing poor running
Yup.
That was me.
I had bad injectors, tested them by pulling off the big connector on the ECM and probing the sockets with my DVM.
I did confirm injector failure, but also managed to physically...
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