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Forum: C4 ZR-1 Technical Postings 05-03-2017
Replies: 16
Views: 3,860
Posted By msuhanek
Re: 91 ZR1 - Latest Issue

My ZRI is now in the shop. The mechanic says there is a combination of oil and coolant in the valley drain. He will clean out the valley drain but where could the coolant come from? Thanks


Sent...
Forum: C4 ZR-1 Technical Postings 05-02-2017
Replies: 10
Views: 3,116
Posted By msuhanek
Re: Which x pipe?

The previous owner installed "true dual" exhausts with headers and Flowmaster's. Neighbors love me at 6 AM on Sunday while going to caffeine and octane. Down the road, thinking about installing X...
Forum: C4 ZR-1 Technical Postings 04-03-2017
Replies: 10
Views: 2,221
Posted By msuhanek
Re: Older PROM Chip

I had a mid 90s prom chip in my 91 ZR-1 that I posted with a pic about six months ago. The car ran fine, with the exception of a backfire or two downshifting. And I wanted the overriding feature that...
Forum: C4 ZR-1 Parts For Sale / Wanted 03-24-2017
Replies: 18
Views: 4,299
Posted By msuhanek
Re: original windshield

Call it patina and have a nice day. It's only original once!



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Forum: C4 ZR-1 Technical Postings 03-14-2017
Replies: 15
Views: 4,010
Posted By msuhanek
Oil Usage

My 91 ZR-1 uses about a quart every 1100 miles or so. 62k miles. No leaks or oil smoke I see. Plugs are clean. Any ideas or concerns?


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Forum: C4 ZR-1 Technical Postings 01-26-2017
Replies: 9
Views: 3,031
Posted By msuhanek
Re: High Idle

Thanks roadster and Mike 100 for the quick reply. Those are my final two options. Will look at the IAC valve this weekend and pull the Plenum down the road if needed


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Forum: C4 ZR-1 Technical Postings 12-11-2016
Replies: 11
Views: 5,203
Posted By msuhanek
Re: Plenum Coolant Hose Question

Thanks Second - if small vacuum leak try looking at/replacing and tighting all the rubber hoses? Any more help greatly appreciated. Thanks
:flag:
Forum: C4 ZR-1 Technical Postings 12-11-2016
Replies: 11
Views: 5,203
Posted By msuhanek
Re: Plenum Coolant Hose Question

Would bypassing the Coolant injector also increase the idle speed - my idle speed is generally in the 1000-1100 range on the tach. Thanks all!
:Eagle:
Forum: C4 ZR-1 Technical Postings 12-10-2016
Replies: 11
Views: 5,203
Posted By msuhanek
Plenum Coolant Hose Question

Afternoon all - Not sure if I explained this question properly but has anyone seen this type of setup on the LT5? See pic. The prior owner (a ZR1 Registry Member) bypassed both the vacuum(?) openings...
Forum: C4 ZR-1 Technical Postings 12-02-2016
Replies: 26
Views: 7,089
Posted By msuhanek
Re: Tail pipe halfsies?

My 91 ZR-1 works off long tube stainless headers and true duals. Late model Vettes druel when I pull up at events!


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Forum: C4 ZR-1 General Postings 11-21-2016
Replies: 35
Views: 7,394
Posted By msuhanek
Re: New Struts

Thanks for the tip on front hood supports - will change out asap as it takes two arms to open gently.
Forum: C4 ZR-1 Technical Postings 11-16-2016
Replies: 13
Views: 4,854
Posted By msuhanek
Re: Car Vibration - 50MPH+

Thanks, should have mentioned car vibrated b4 new tires and road force balance which leads to ujoints possibly but car only has 61k miles.


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Forum: C4 ZR-1 Technical Postings 11-16-2016
Replies: 13
Views: 4,854
Posted By msuhanek
Wink Car Vibration - 50MPH+

My 1991 ZR1 has developed a vibration that appears to be coming from underneath, feeling it from my seat and through the steering wheel that is also vibrating a bit when it hits 50mph and over. Tires...
Showing results 1 to 13 of 13

 
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