Intermittent DNS - Page 2 - ZR-1 Net Registry Forums

Kevin · 05-11-2017

If you need a how to on bypassing the clutch switch I can post it when I get home from work tonight.

QB93Z · 05-11-2017

Quote:

Originally Posted by ALLTHECAMS

OK now I'm confused LOL. In your first post you said if the needle did t move it wasn't the starter but to into the clutch safety switch or VATS? Sorry but I'm a dummy when it comes to diagnosing electrical issues.

You are correct. I am on the road in Colorado right now and wasn't following you comments carefully enough. I suggest troubleshooting the starter circuit to identify a switch or wiring that is failing. I don't have any manuals with me so I will leave the explanation to others.

Jim

Z51JEFF · 05-11-2017

Bypassing the switch is easy. Pull the hush panel and look up under the dash and look for the 10 gauge PURPLE WIRE plug,it should be towards left of the steering column. I have a jumper I made,if you were closer I'd loan it to you for some trouble shooting.

ALLTHECAMS · 05-11-2017

Quote:

Originally Posted by Z51JEFF

Bypassing the switch is easy. Pull the hush panel and look up under the dash and look for the 10 gauge PURPLE WIRE plug,it should be towards left of the steering column. I have a jumper I made,if you were closer I'd loan it to you for some trouble shooting.

Jumper across the plug then?

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5ABI VT · 05-11-2017

Might not be much use but I posted my experience here :
http://www.zr1.net/forum/showthread.php?t=26832

Check out post #53 I posted a photo of the clutch switch on my 94. Just thought I would add that because I jumpered the wrong switch early and chased my tail for a while before I realized it.

Z51JEFF · 05-12-2017

Quote:

Originally Posted by ALLTHECAMS

Jumper across the plug then?

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Yes. I've got a new switch but when the time comes to replace it I'll bypass it,too much of a hassle to get to the switch.

ALLTHECAMS · 07-14-2017

So a couple weeks ago I had the DNS again. I replaced the battery and ran a bypass on the clutch safety switch and thought I had solved the problem. WRONG!!

This morning when I got in the car to go to a show I turned the key and no crank. I tried jumping it on both my pickup and a battery charger, waiting 5-10 minutes between each attempt. Then I ran a jumper between the purple wire and the VATS lockout relay. It will crank but will not fire. I have fuel pressure in the rails, plenty of voltage at the battery, but I dont know if the injectors are firing or if I have spark. When I crank it the tach needle comes off its stop but only shows 0.

it is difficult alot of times to turn the key cylinder back so I can get my key out.
Help!!! This is my dream car, but I've never had a car this unreliable.

ALLTHECAMS · 07-16-2017

Anyone??

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Ccmano · 07-16-2017

Pull a spark plug wire then crank it with a plug checker or just a screwdriver to ground and see it you have spark. If no spark I'll bet it's a VATS issue.

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Z51JEFF · 07-16-2017

One other option is to put a secondary relay in for the starter,check out sticky thread in the ZR-1 second on the other site.

05-11-2017	#11
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: Intermittent DNS If you need a how to on bypassing the clutch switch I can post it when I get home from work tonight. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

05-11-2017	#13
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,037	Re: Intermittent DNS Bypassing the switch is easy. Pull the hush panel and look up under the dash and look for the 10 gauge PURPLE WIRE plug,it should be towards left of the steering column. I have a jumper I made,if you were closer I'd loan it to you for some trouble shooting.

05-11-2017	#15
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Intermittent DNS Might not be much use but I posted my experience here : http://www.zr1.net/forum/showthread.php?t=26832 Check out post #53 I posted a photo of the clutch switch on my 94. Just thought I would add that because I jumpered the wrong switch early and chased my tail for a while before I realized it.

07-14-2017	#17
ALLTHECAMS Join Date: Jul 2016 Location: Bloomington, MN Posts: 127	Re: Intermittent DNS So a couple weeks ago I had the DNS again. I replaced the battery and ran a bypass on the clutch safety switch and thought I had solved the problem. WRONG!! This morning when I got in the car to go to a show I turned the key and no crank. I tried jumping it on both my pickup and a battery charger, waiting 5-10 minutes between each attempt. Then I ran a jumper between the purple wire and the VATS lockout relay. It will crank but will not fire. I have fuel pressure in the rails, plenty of voltage at the battery, but I dont know if the injectors are firing or if I have spark. When I crank it the tach needle comes off its stop but only shows 0. it is difficult alot of times to turn the key cylinder back so I can get my key out. Help!!! This is my dream car, but I've never had a car this unreliable. __________________ 1991 ZR-1 #520 Arctic White/Gray

07-16-2017	#18
ALLTHECAMS Join Date: Jul 2016 Location: Bloomington, MN Posts: 127	Re: Intermittent DNS Anyone?? Sent from my XT1080 using ZR-1 Net Registry mobile app __________________ 1991 ZR-1 #520 Arctic White/Gray

07-16-2017	#19
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Intermittent DNS Pull a spark plug wire then crank it with a plug checker or just a screwdriver to ground and see it you have spark. If no spark I'll bet it's a VATS issue. Sent from my iPhone using ZR-1 Net Registry __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

07-16-2017	#20
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,037	Re: Intermittent DNS One other option is to put a secondary relay in for the starter,check out sticky thread in the ZR-1 second on the other site.