Won't Start - Forums - Official C4 Vette Registry

SPONSOR AD

Support our Vendors! | Advertise Here

Topic: Won't Start

in Forum: C4 Electrical

Already a Member?
Login
Not yet a Member?
Register for Free!

Won't Start (1/7)
9/1/11 9:25am

hd98fxdl
Standard Member
Send Private Message

Dardenne Prairie, MO - USA

Vette(s):
1993 Ruby Red Coupe

Joined: 10/3/2009
Posts: 7

1993 Coupe LT1

The fuel pump turns on and the engine turns over but will not start.

I placed a jumper on the A-B terminals on the ALCL but no codes (except 12) were displayed.

I removed the jumper and the engine started.

I have had this issue in the past but it was always when the engine was hot. I would try the engine 3 -4 times and it would start or i would let it sit for about 15 minutes and then it would start.

Looking for suggestions.

Quote

Our Sponsors help support C4VR

Re: Won't Start (2/7)
9/1/11 9:43am

hd98fxdl
Standard Member
Send Private Message

Dardenne Prairie, MO - USA

Vette(s):
1993 Ruby Red Coupe

Joined: 10/3/2009
Posts: 7

I just tried to start it today and it would not start. Still no codes and this time it did not start after I removed the jumper.

Quote

Re: Won't Start (3/7)
9/1/11 1:12pm

Adams' Apple
Standard Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
1985 Coupe-L98/Auto,Bright Red/Carmine. 1974 Coupe-L48/4speed, Medium Red Metallic/Black Deluxe.

Joined: 3/18/2009
Posts: 2230

I would suggest checking fuel pressure first. Just because you can hear the pump running doesn't always mean it's getting fuel to the front.
I would also want to check for spark at the plug(s). Then, if I had fuel, and spark, it should run, unless the cam timing is off(timing chain).
Most of the earlier GM ECMs would not store a code once the key is turned off. Try starting the car a few times, then leave the key on, and jumper the connector, and see if it brings up any codes that way. Thumbs Up

______________

Joel Adams
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Quote

Re: Won't Start (4/7)
9/1/11 7:36pm

Trooper
Standard Member
Send Private Message

Hermitage, TN - USA

Vette(s):
1990 C-4 Coupe Polo Green Saddle Interior L-98

Joined: 8/8/2010
Posts: 280

Had a similar problem with mine that came and went. Finally gave up and took it to the dealer. Turned out to be the starter and starter wiring. (Mostly wiring I think) The heat of the engine had pretty much cooked the wiring and the connectors making it work eratically, and once hot it would turn up till it got progressively worse and then it was just like yours, wouldn't even start the next day. So I replaced the starter and the wiring and so far (Knock on wood) no more trouble.

______________

Allan Brenneis Nashville Tn. 1990 Polo Green Coupe Saddle Interior Chrome ZR-1 Rims https://www.c4vetteregistry.com/member_uploads/14501_14600/14572/image2014329104347r.jpg

Quote

Re: Won't Start (5/7)
9/1/11 9:09pm

eddie20890
Standard Member
Moderator
Send Private Message

lanoka harbor, NJ - USA

Vette(s):
1990 L-98 white/ red/black leather interior targa top auto 1975 L48 blue/black leather interior t tops auto

Joined: 3/22/2009
Posts: 1363

i would also check the ignition module. in the early years of electronic ignition if it went bad that was it and car wouldnt start. in the updated ones they can work intermittently thus people would think it is ok. just a thought.

______________

the dynamic duo

c3vr life member #97

Quote

Re: Won't Start (6/7)
1/23/12 12:41pm

themailman
Standard Member
Send Private Message

Pickens, SC - USA

Vette(s):
1989 Red,convertible,sold an 78 Black coupeSilver Anniversary after 3 years.

Joined: 7/21/2009
Posts: 24

Joel, just going back a few months to my C4 not starting/shutting off by itself,no re-start but cranks problem. It WAS the ECU. Thanks for all the help to everyone who responded. Joe

Quote

Re: Won't Start (7/7)
1/24/12 12:07am

Thanks for the update! Glad ya got it runnin, anyway. Thumbs Up

______________

Joel Adams
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Quote

Our Sponsors help support C4VR