Dead 93
Le Mans Master
Joined: May 2005
Posts: 7,337
Likes: 2,266
From: Central Maryland
A noid light is available at most parts stores. It plugs into the injector harness in place of an injector, and flashes when the engine is cranked if the ECM is sending pulses to trigger the injector.
A coil wire that's arcing to engine ground can definitely cause a no-start condition.
Be well,
SJW
A coil wire that's arcing to engine ground can definitely cause a no-start condition.
Be well,
SJW
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
I checked the coil wire and it was in top shape, not touching anything. I'll stop by tomorrow and pick up a FP gauge. Get back with you then.
I thank all of you for your assistance so far.
I thank all of you for your assistance so far.
Burning Brakes
Joined: Jan 2005
Posts: 1,217
Likes: 0
From: Augusta GA
That info would have been helpful about 2 weeks ago. 
My no start condition turns out that the fuel injectors where not pulsing when they should have been. Anyway, as simple as this may sound its taken two weeks to find this out.
Oh, and its still not fixed
My no start condition turns out that the fuel injectors where not pulsing when they should have been. Anyway, as simple as this may sound its taken two weeks to find this out. Oh, and its still not fixed
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Originally Posted by HOWSER
Great idea. What's the best way to view it? From the top or underneath? And did you or would this cause a no start?
Instructor
Joined: Jun 2006
Posts: 194
Likes: 0
From: Hartselle Al
I agree, For me, It was the Ignition Module
Originally Posted by Redeasysport
Impossible to jump timing with an Opti.SJW is correct.If you don't have it get the FSM from www.helminc.com for your car.My guess is either opti, Ignition control module or fuel pump and all tests for them are in the manual.
Last edited by Jack_leg; Jun 7, 2006 at 10:29 PM.
Burning Brakes
Joined: Nov 2005
Posts: 797
Likes: 0
From: Bedford Ma.
Originally Posted by Mr Mojo
Before you go nuts, check your coil wire and make sure it isn't rubbing against your water pump. This happened to me and I had the same symptoms as you describe.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Originally Posted by Jack_leg
My 93 left me on the side of the road in Birmingham on a hot day. It was the Ignition Module. I did the testing to see if I had proper fuel pressure ( It did), Then I check for spark from the plugs, then I went ahead and check the injectors with a node light (they were working). So, with this all in mind, I looked for the module, It was close to the front of the block on the passenger side, near the top of the block. I had to scrape some engine funk off to see it clearly. I took it to a parts store and had it tested. I’m not sure if they could or not, its been awhile but I bought one and I fixed my problem. Good luck, Hope this helps.
Thanks again.
Eric
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Instructor
Joined: Jun 2006
Posts: 194
Likes: 0
From: Hartselle Al
1993 Corvette Ignition Module
I didn't look, I'm at work and the car is at home waiting for me to put brakes on it. The module is on the block or head, I’m not sure but it is mid-way up the motor on an aluminum surface. Passenger side. Follow the wires that will help. Haynes doesn't show it if I remember correctly. If you looked at the new one at the parts store you should find it with no problem.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Thanks. I have just removed it and I'm getting ready to go to the parts store to get it tested. I found a diagram in my service manual which made it much easier. I'll get back with you guys in just a bit.
Cheers!
Cheers!
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Originally Posted by Jack_leg
Good luck.
I'll do it first thing in the a.m.
Instructor
Joined: Jun 2006
Posts: 194
Likes: 0
From: Hartselle Al
How much did they want for it? Did you think about Advance auto? They will have higher prices sometimes, but you can price match. Also, is this a order thing?
O, How much did it set you back to get the 375 gears?
O, How much did it set you back to get the 375 gears?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
HOWSER, have you checked fuel pressure yet, or made sure the fuel pump is priming the rails. This would be the first thing *I* looked at before taking apart the engine components. A failing fuel pump would cause what you described in the first post. The way I check for spark is use a known good spark plug and try each wire. Disconnect each wire from its plug and use the spare plug about 1/2" from the exhaust manifold and have someone crank on the engine after the fuel pump fuse is out. You should see a blue spark at all 8. To start and engine you need fuel, spark, and air and all at the right time. I would troubleshoot in that order. IMO
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Originally Posted by RRT vette
HOWSER, have you checked fuel pressure yet, or made sure the fuel pump is priming the rails. This would be the first thing *I* looked at before taking apart the engine components. A failing fuel pump would cause what you described in the first post. The way I check for spark is use a known good spark plug and try each wire. Disconnect each wire from its plug and use the spare plug about 1/2" from the exhaust manifold and have someone crank on the engine after the fuel pump fuse is out. You should see a blue spark at all 8. To start and engine you need fuel, spark, and air and all at the right time. I would troubleshoot in that order. IMO
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Well the ignition module tested bad. I won't be able to install it till later this afternoon though. I asked them (O'Reilly's Auto Parts) if they would grefund the part if the car doesn't fire and they agreed. There is always a chance the tester failed.
They wanted $94 for that little module, and that was a competitive price! Youch!
I'll keep you guys posted.
Thanks again.
They wanted $94 for that little module, and that was a competitive price! Youch!
I'll keep you guys posted.
Thanks again.
Team Owner
Joined: Oct 2000
Posts: 96,443
Likes: 9
From: Fort Knox, KY
Cruise-In IV Veteran
Cruise-In VI Veteran
Cruise-In VII Veteran
Cruise-In VIII Veteran
Originally Posted by HOWSER
Well the ignition module tested bad. I won't be able to install it till later this afternoon though. I asked them (O'Reilly's Auto Parts) if they would grefund the part if the car doesn't fire and they agreed. There is always a chance the tester failed.
They wanted $94 for that little module, and that was a competitive price! Youch!
I'll keep you guys posted.
Thanks again.
They wanted $94 for that little module, and that was a competitive price! Youch!
I'll keep you guys posted.
Thanks again.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Glad you found the possible problem.Yep they are pricey but cheaper than the opti and a whole lot easier to install.Make sure you use the heatsink paste on install it should come with the module. Superior Chevy in KS( a forum supporter) has genuine GM ICM for $90.I recommend it over after market ones they have been reported to prematurely fail sometimes.
Last edited by Redeasysport; Jun 9, 2006 at 01:07 PM.
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Well I installed the new module with no difference. I ended up taking it back and having a different person retest the original ignition module. This time it tested good, 2 different ways.
I bought a fuel pressure gauge and tested that. 39psi.
Where should I go next?
I bought a fuel pressure gauge and tested that. 39psi.
Where should I go next?
