More issues, no start & more.

[captcorvette]

Last week to the Z to renew the registration and didn't have problems. Brought it back to my hobby garage and parked it for two days. Third morning I was going to move it and the right headlight wouldn't rotate. Found that the headlight had cut 3 wires some how? Then tried to start the car and got no start. Security light is on anytime key (same key as the days before) is inserted into the ignition. Strange that passenger door always illuminates the courtesy light. Driver's door sometime will illuminate the courtesy (interior) lights and sometimes not.

Looking in the manual but I am a bit thick on the spark chasing side of things.

What am I missing here?
Discouraged in Dubai.

[VetteMed]

The door issue may just be a sticking door ajar switch on the driver's side door. try pressing the plunger on the driver's switch several times, to clean the contacts.

As for the security light being on, I think that means the VATS system is preventing the car from starting. Try cleaning the "pellet" on the key with rubbing alcohol, or try a different key.

[captcorvette]

Tried all three keys. One original, two duplicates with correct ohms reading and no change.

Doors locked or unlocked from inside and outside makes no change either. Tried cleaning chip. No change.

Put my scanner on the car and cleared the VATs code. Immediately returned.

[VetteMed]

I think the 1990s used a separate VATS module, if I recall correctly. 1991+ the VATS is contained within the BCM, I think. The VATS modules do in fact go bad from time to time.

[tomtom72]

just a fwiw on the VATS. You did wait the 5 minutes, not sure on the exact time period. If you don't wait though it resets the timer back to zero that much I'm fairly certain of.

The sticking door light switch could be the source as those switches are labeled as part of the VATS system. I just bought one and it's on the box in the part description.


Tom

[captcorvette]

Yep waited 20 plus minutes between attempts as I have had multiple VATs issues with this car. Ordered a bypass unit last year and it didn't solve the issue.
Also ordered a bypass chip from PCM's for less with the VATs susposedly canceled. That didn't work also. Also the reason I bought the extra keys with the correct ohms readings which didn't make a difference.

Have never managed to sort out the miss or the secondaries to come on. The vacuum pump now runs all the time and I cannot determine exactly how many pipes come off the pump? Looks like a very small one came off the bottom of this one and it broke off flush with the bottom or perhaps it is for some other purpose but I cannot find any information that tells what it could be?

[tomtom72]

http://zr1netregistry.com/ZR1_howto.htm use this to our NetRegistry page for trouble shooting. There are some great "how To's" also. Also, Dynomite has an extensive listing of "issues" and "cures" in the "Solutions" section. There maybe some leads to run down there also.

You might want to PM TCCrabs ( Tom from CA ) as he did a diagram that addresses the no start issue. Also check out the link for possible causes & solutions.

I figure you tried to by-pass the clutch safety switch?


Tom

[VetteMed]

Originally Posted by captcorvette

Have never managed to sort out the miss or the secondaries to come on. The vacuum pump now runs all the time and I cannot determine exactly how many pipes come off the pump? Looks like a very small one came off the bottom of this one and it broke off flush with the bottom or perhaps it is for some other purpose but I cannot find any information that tells what it could be?

There is only one line that comes off the vacuum pump. The pump's sole purpose is to draw a vacuum so that the secondary throttle plate system always has the vacuum available which is needed to keep the plates open. This is really only an issue at sustained higher RPMs where natural manifold vacuum will drop.

If the pump is always running, that's a sure fire indication of a vacuum leak in the system somewhere. Probably time for a plenum pull.

[captcorvette]

Thanks for all the info folks. Have had the plenum off several times. Me once and agency twice. Last time was agency and I wasn't impressed with their "expert". Yeah I know the deffination of an "EXPERT".

Will go back through all the write ups and clean out my head to try and insure I am not taking preconcieved itdeas and mistakes with me.

Thank you everyone.

[Tyler Townsley]

Another tip is to run a wire from the starter out to the battery. Connect it to the starter in such a way that touching the other end to the positive terminal starts the car. I have done this with my 88 Ptype because it has a habit of doing the no-start because it cannot read the key correectly after sitting for a long period.

Tyler