ZR-1 Net Registry Forums  

Go Back   ZR-1 Net Registry Forums > Search Forums
Reload this Page Search Results
Register FAQ Calendar Today's Posts Search

Showing results 1 to 16 of 16
Search took 0.00 seconds. Search: Posts Made By: bmarcum
Forum: C4 ZR-1 Technical Postings 04-02-2024
Replies: 0
Views: 143
Posted By bmarcum
Secondary fans

I need some help with my secondary fan. Long story short I can't find me FSM. Why primary fan is fine. My secondary fan comes on with ac, but will not come on at 230 degrees as it should. It only...
Forum: C4 ZR-1 General Postings 03-31-2024
Replies: 13
Views: 1,459
Posted By bmarcum
Re: Master Tech award & LT5 engine in Dinning room

Not sure why but I wasn't able to send you a private message. Please message me at your convenience I am interested. I like you love corvettes but the ZR-1 holds a special place in time for me! I...
Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted 02-15-2024
Replies: 15
Views: 1,706
Posted By bmarcum
Re: 19 Miles, 90 ZR-1 Selling Today Barrett Jackson

Thanks for the first hand account of the condition. That is a skill that is lost in the generation of the internet and BAT. BTW I am part of that but my dad was a master tech that began running...
Forum: Cleaning and Waxing 01-06-2024
Replies: 5
Views: 3,509
Posted By bmarcum
Re: Tried Tooth Paste on My Engine?

I have used 3m rubbing compound on the valve covers and intake to remove stains and hazing. Worked pretty well.
Forum: C4 ZR-1 Technical Postings 09-29-2022
Replies: 0
Views: 313
Posted By bmarcum
Throttle Cable

My throttle cable has stretched. Anyone ever experience this? You can see the slack at the throttle body. The cable or the "lock" must have slipped. I still need to diagnosis the real issues, but I...
Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted 05-23-2022
Replies: 54
Views: 7,564
Posted By bmarcum
Re: FS Single fuel pump conversion for LT5

I am very interested as well. What is the one wire that has to be disconnected from the ECM? How do you suggest disconnected it? What does the computer know/do? Also how best to order your set up....
Forum: C4 ZR-1 General Postings 04-14-2022
Replies: 34
Views: 2,595
Posted By bmarcum
VIN of the first ZR-1 sold to the pubic

I am interested to see how early of a car my 1990 is and couldn't find any info. I seem to remember that the serial numbers started at 100?
Forum: C4 ZR-1 Technical Postings 03-31-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

Great point on the oscilloscope. That sounds like a great Idea. What is best for the LT5? I have a friend of a friend that has a old Sun engine analyzer for traditional distributor systems. I don't...
Forum: C4 ZR-1 Technical Postings 03-29-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

The Gremlin is back. Grrrr! I am thinking about the ignition module, but not sure that it could be the problem. I know Jerry's Gasket has NOS, but they are $1300. I understand and appreciate his...
Forum: C4 ZR-1 Technical Postings 03-15-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

I hate this kind of update, but I wanted to close the loop with everyone that made suggestions. I feel that I should give a little of my fathers and my back ground. My father was a master tech with...
Forum: C4 ZR-1 Technical Postings 03-13-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

Does anyone know if the control module sets dwell for the coils individually? I feel from all the parameters that I have I am dealing with an ignition module that has weak component related to how GM...
Forum: C4 ZR-1 Technical Postings 03-13-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

I am checking the weak spark by pulling the plug wires and letting it arch to the valve cover bolts. That is how I know the spark is weak on cylinder #1. All other cylinders have great spark! Also it...
Forum: C4 ZR-1 Technical Postings 03-12-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

I noticed the miss driving down the interstate in 6th gear at low rpm. Then it became common. I was able to identify that it is on cylinder #1 by pulling all plug wires one at a time. It was easy to...
Forum: C4 ZR-1 Technical Postings 03-12-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

Yes I believe the map hose is fine. How would the map cause an ignition miss? I am only seeing a weak spark on cylinder #1 intermittently.
Forum: C4 ZR-1 Technical Postings 03-12-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Re: Need an oracle! Low speed miss on cylinder #1 only.

No I replaced the injectors 4ish year ago. They had failed due to the ethanol issue. Also the computer has been replaced at that same time.
Forum: C4 ZR-1 Technical Postings 03-12-2021
Replies: 21
Views: 1,763
Posted By bmarcum
Need an oracle! Low speed miss on cylinder #1 only.

Okay sorry for the lengthy post but I need some help. I have a LT5 shop manual but I can?t find it at the moment. I have a 1990 ZR-1 #103. The Z has about 109K miles on it at the moment. This is my...
Showing results 1 to 16 of 16

 
Forum Jump

All times are GMT -4. The time now is 12:05 AM.

Contact Us - ZR-1 Net Registry - Archive - Privacy Statement - Top

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020