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Forum: C4 ZR-1 General Postings 07-06-2024
Replies: 6
Views: 5,238
Posted By mmkkpro
Re: Any one keeping details on average mile on 90's

My 1990 #2822 has 88k on her now. I bought her back in 2018,she had been sitting for a decade or more. She had 74k, after refurbishing her, injectors, belts hoses, tires, fluids, plugs wires and had...
Forum: C4 ZR-1 Technical Postings 05-19-2024
Replies: 4
Views: 9,378
Posted By mmkkpro
Re: Bought Valvoline VR1 20-50

Thanks for chiming in guys. Next time I will pay closer attention to the weight. Thanks again.
Forum: C4 ZR-1 Technical Postings 05-18-2024
Replies: 4
Views: 9,378
Posted By mmkkpro
Bought Valvoline VR1 20-50

I bought Valvoline VR1 20-50, apparently I wasn't paying attention. My 1990 ZR-1 #2822 has 88k miles right now and is running great. My question is, am I safe with this weight oil? I live on the SE...
Forum: C4 ZR-1 General Postings 11-06-2022
Replies: 2
Views: 653
Posted By mmkkpro
Sunday morning test drive

Good morning guys,I got my low oil pressure switch in a few days ago with help from the wife , she is now a active member of the C-4 ZR-1 maintenance club, lol.1
Took her out for a test drive a...
Forum: C4 Members' Rides 10-29-2022
Replies: 99
Views: 19,893
Posted By mmkkpro
Re: 90 ZR-1 #2273 - To be rescued

I rescued #2822,1990 Z back in 2018 from Myrtle Beach SC. It had been just sitting for many years. 74k miles on the clock. I started at the fuel tank and worked my way forward. Got tags and insurance...
Forum: C4 ZR-1 Technical Postings 10-29-2022
Replies: 37
Views: 27,021
Posted By mmkkpro
Re: Oil Pressure Switch

:cheers:My wife and I just got done with said switch. Did not remove anything or jack up the engine. My wife went in above the lower radiator hose with her small hands. I bought a short sensor socket...
Forum: C4 ZR-1 Technical Postings 10-24-2022
Replies: 37
Views: 27,021
Posted By mmkkpro
Re: Oil Pressure Switch

Man, you guys ROCK. My 1990 just did this. No way to get to it from below, so from the top I go. I unplugged the switch and the connector is full of oil. Ordered one from Jerry a few minutes ago....
Forum: C4 ZR-1 Technical Postings 12-18-2020
Replies: 2
Views: 2,169
Posted By mmkkpro
Re: 1990 ZR-1 seat type?

Thank you, will do, i appreciate it.
Forum: C4 ZR-1 Technical Postings 12-18-2020
Replies: 2
Views: 2,169
Posted By mmkkpro
1990 ZR-1 seat type?

I'm trying to order seat covers for my 1990 ZR-1 and it says there are 6 seat types, can't find any info as far as rpo codes for seats. They are sport seats with controls on both bolsters. Does...
Forum: C4 ZR-1 General Postings 12-11-2020
Replies: 3
Views: 544
Posted By mmkkpro
A big thank you.

I wanted to thank everyone that has helped me bring my 1990 ZR-1 back from the brink. Many people have helped me with information on how, what and why. The Registry has been a gold mine of knowledge....
Forum: C4 ZR-1 Technical Postings 10-23-2020
Replies: 1
Views: 996
Posted By mmkkpro
Early targa top

Hi guys, so I'm working on the top for my 1990 Z, the mounting system is 1984-early 86. I found a page on Mirrock corvette website that explains all the changes in top mounting design, and mine shows...
Forum: C4 ZR-1 Technical Postings 09-20-2020
Replies: 4
Views: 888
Posted By mmkkpro
Re: Clean throttle body

Better Pic.
Forum: C4 ZR-1 Technical Postings 09-20-2020
Replies: 4
Views: 888
Posted By mmkkpro
Clean throttle body

I guys, I am doing the water pump on my 1990 and figure I would clean the TB while I have it off. I am reading about DAG, but I don't see any on mine. Only thing I see are what looks like rings where...
Forum: C4 ZR-1 Technical Postings 08-12-2020
Replies: 8
Views: 1,042
Posted By mmkkpro
Re: Nunber 6 cylinder miss solved

Thank you guys for the replies. I'm probably going to try them, I removed the stock mufflers and spare tire and associated parts and the car sits much higher in the rear now. I bought 2 inch lowering...
Forum: C4 ZR-1 Technical Postings 08-11-2020
Replies: 8
Views: 1,042
Posted By mmkkpro
Number 6 cylinder miss solved

Hi guys, I had been chasing a miss on cylinder #6, come to find out it was the ECM. So I sent it to Marc H and he tested it to confirm and he had the soldier reflowed. I installed it this morning and...
Forum: C4 ZR-1 Technical Postings 07-06-2020
Replies: 2
Views: 812
Posted By mmkkpro
Re: Test injector pulse

Nice, thank you, so what I ended up doing was removing the ignition module from plenum, folding a shop rag and laying it on top of the coils. Connected the crank sensor and ignition connector to IM,...
Forum: C4 ZR-1 Technical Postings 07-04-2020
Replies: 2
Views: 812
Posted By mmkkpro
Test injector pulse

Good morning guys, I bought a set of noid lights to test injector pulse at the injector connector. Do any of you guys know if I will get a pulse with the plenum removed. I have all the electrical...
Forum: C4 ZR-1 General Postings 07-02-2020
Replies: 3
Views: 933
Posted By mmkkpro
Re: Scan tool for 1990Z

Hi Paul, thank you for replying. I was searching the other night for Obd1 scanners and came across this product from 1320electronics, it is a bluetooth device that monitors engine systems it looks...
Forum: C4 ZR-1 General Postings 06-29-2020
Replies: 3
Views: 933
Posted By mmkkpro
Scan tool for 1990Z

Hi guys, I am looking for a scanner for my 1990 ZR-1. I know the tech 1 and tech 1a are the best but hard to find. Is there any other scanners reasonably priced that compare to the tech series. I...
Forum: C4 ZR-1 Technical Postings 06-16-2020
Replies: 5
Views: 1,982
Posted By mmkkpro
Re: Compression test

Not sure CC, I have had it for many moons. I am at sea level, Holden Beach about a mile off the water as the crow flies. I do need to update it, I put new plugs in after the compression test, drove...
Forum: C4 ZR-1 Technical Postings 06-16-2020
Replies: 5
Views: 1,982
Posted By mmkkpro
Re: Compression test

Thanks tf95ZR1, the FSM says to disconnect the crank sensor, I did the battery charger and held throttle plates wide open, didn't think about FP1 though. It's running again. Here are the numbers warm...
Forum: C4 ZR-1 Technical Postings 06-16-2020
Replies: 5
Views: 1,982
Posted By mmkkpro
Re: Compression test

I think I found it, suppose to disconnect the crankshaft timing sensor. Thanks.
Forum: C4 ZR-1 Technical Postings 06-16-2020
Replies: 5
Views: 1,982
Posted By mmkkpro
Compression test

Hi guys, I am doing a compression test, what should I do about the plug wires? Should I put a plug on each wire or is there a way to kill the ignition system? I have read that I'm not suppose to...
Forum: C4 ZR-1 Technical Postings 06-13-2020
Replies: 17
Views: 4,105
Posted By mmkkpro
Re: Fuel pump not running.

:dancing32valveZ,im a dummy, we stopped and talked, that car is a cream puff, it looked sharp riding up the road. I been working on mine for a year, finally got her on the road about a month ago. I...
Forum: C4 ZR-1 Technical Postings 06-13-2020
Replies: 17
Views: 4,105
Posted By mmkkpro
Re: Fuel pump not running.

Hello Paul, the #6 plug is dry and still looks brand new, the others are a little black indicating a rich condition, which for now is ok, because it let's me know they are getting fuel.
I just...
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