Man I REALLY NEED HEED !!! Corvette cutting off
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
Man I REALLY NEED HEED !!! Corvette cutting off
Hey Guys, I really need help with this one..
Over the holiday my 94 Corvette starts fine, runs for about 20 minutes and then starts to shudder as if its not getting any gas....studders, and then shuts off and won't start for another 45 minutes. It will crank, but won't start..
Does anybody have any ideal what this could be? At first I thought I could have had water in the gas... it had that effect.. I put in gas treatment but continues to do the same...
Any advice is appreciated in advance..
Thanks
Vision
Over the holiday my 94 Corvette starts fine, runs for about 20 minutes and then starts to shudder as if its not getting any gas....studders, and then shuts off and won't start for another 45 minutes. It will crank, but won't start..
Does anybody have any ideal what this could be? At first I thought I could have had water in the gas... it had that effect.. I put in gas treatment but continues to do the same...
Any advice is appreciated in advance..
Thanks
Vision
Cruising
Joined: Dec 2007
Posts: 13
Likes: 0
From: LOUISVILLE KY
I'm not an expert by any means..lord knows i got problems with my own C4 but yours definately sounds to be heat related.it runs fine for 20 mins then dies and won't start again until its cool. Sounds to me that you have an electrical circut going to ground once everything heats up. may be in the opti spark(LT1 i'm assuming). i'm sure someone else will chime in with a more definitive answer for you.good luck
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Sounds like a fuel pump. Once they cool down they can sometimes start, maybe get you a block or so and die again. Try putting a fuel pressure gauge on the shrader valve (on fuel rail) yet to see what it reads? Mine did the same thing..
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
I had a feeling that it was possibily the fuel pump because it felt like it wasn't getting any fuel, but when it ran again after 40 minutes, i had second thoughts. I guess I didn't know that the fuel pump cooled off and would start again...
Vision
Vision
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
Best thing to do is put a F.P. gauge on it, youl know right away.
Check it first before throwing a part at it just to be sure. Ive heard of other symptoms similar with the LT1 ign but Im not hip to them...COuld possibly be somethign else but Id put money on fuel delivery first.
Check it first before throwing a part at it just to be sure. Ive heard of other symptoms similar with the LT1 ign but Im not hip to them...COuld possibly be somethign else but Id put money on fuel delivery first.
Moderator Emeritus
Joined: Jun 2002
Posts: 46,133
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From: Maryville Tn
CI 5 thru 12 Veteran
St. Jude Donor '09 thru '23
NCM Sinkhole Donor
I'd check the ignition module first. If the grease behind the module is gone, it overheats when the car gets up to operating temp and the car will cut off. Hopfully this helps.
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
How do you check the ignition module, and is it something i can do..? I'm not a mechanic, but im not afraid to jump on it if its possible.. I change pads, oil, and some minor repairs... so if this is something i can do, let me know..??
I also noticed that its not even starting now.... I let it sit for a week...and it turns over but won't even start now..
Thanks guys, I really appreciate your time..
Vision
I also noticed that its not even starting now.... I let it sit for a week...and it turns over but won't even start now..
Thanks guys, I really appreciate your time..
Vision
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Moderator Emeritus
Joined: Jun 2002
Posts: 46,133
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From: Maryville Tn
CI 5 thru 12 Veteran
St. Jude Donor '09 thru '23
NCM Sinkhole Donor
How do you check the ignition module, and is it something i can do..? I'm not a mechanic, but im not afraid to jump on it if its possible.. I change pads, oil, and some minor repairs... so if this is something i can do, let me know..??
I also noticed that its not even starting now.... I let it sit for a week...and it turns over but won't even start now..
Thanks guys, I really appreciate your time..
Vision
I also noticed that its not even starting now.... I let it sit for a week...and it turns over but won't even start now..
Thanks guys, I really appreciate your time..
Vision
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
Just jumped my car and it started and ran for about 30 minutes without shutting off. Haven't changed the fuel filter for a long time, so i'm gonna start there... I'm gonna check the codes... Will a paper clip in each in of the code meter still work for the codes..?? I'm glad the car ran idling for 30 minutes, but I dare take it out in the street.... it has failed too me... and can't trust it...
Thank you guys again for all your help..
Vision
Thank you guys again for all your help..
Vision
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Well, I was going to agree with either fuel pump or ignition control module (been there), but it's starting to sound like you need a new battery. What does the voltage at the battery read?
Intermediate
Joined: Jan 2007
Posts: 27
Likes: 0
From: St. Johns Florida
Electrical
I agree with Lichen. It sounds electrical. Could be a battery or even maybe the alternator as weird as that sounds. Had one where I could drive for a little while then it would die. Would only start with a jumpstart and could drive a short distance and it would die again.
My solution was to pull the battery leads with the car running. In my case, the car died immediately. I replaced the alternator and life was good.
You could take the batter to autoparts store and ask them to test (some stores here in florida do it free). They should be able to give you an idea if the battery is dying or dead.
Good luck.
My solution was to pull the battery leads with the car running. In my case, the car died immediately. I replaced the alternator and life was good.
You could take the batter to autoparts store and ask them to test (some stores here in florida do it free). They should be able to give you an idea if the battery is dying or dead.
Good luck.
Le Mans Master
Joined: Jan 2006
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From: Woodstock Georgia
Le Mans Master
Joined: Jul 2007
Posts: 5,356
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From: No HOA, New Hampshire
Cruise-In X Veteran
St. Jude Donor '09
Best thing to do is put a F.P. gauge on it, youl know right away.
Check it first before throwing a part at it just to be sure. Ive heard of other symptoms similar with the LT1 ign but Im not hip to them...COuld possibly be somethign else but Id put money on fuel delivery first.
Check it first before throwing a part at it just to be sure. Ive heard of other symptoms similar with the LT1 ign but Im not hip to them...COuld possibly be somethign else but Id put money on fuel delivery first.
With a fuel pump problem, a gauge is cheap compared to the ignition.
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
I agree with Lichen. It sounds electrical. Could be a battery or even maybe the alternator as weird as that sounds. Had one where I could drive for a little while then it would die. Would only start with a jumpstart and could drive a short distance and it would die again.
My solution was to pull the battery leads with the car running. In my case, the car died immediately. I replaced the alternator and life was good.
You could take the batter to autoparts store and ask them to test (some stores here in florida do it free). They should be able to give you an idea if the battery is dying or dead.
Good luck.
My solution was to pull the battery leads with the car running. In my case, the car died immediately. I replaced the alternator and life was good.
You could take the batter to autoparts store and ask them to test (some stores here in florida do it free). They should be able to give you an idea if the battery is dying or dead.
Good luck.
So am i correct in checking the fuel filter next..?? How much is the guage to check fuel pressure? Or, should i just change the fuel filter altogether.??
Thanks guys, you are the best. I love doing my own work on my vette. Nobody loves hr like i do...
Vision
Race Director
Joined: Apr 2004
Posts: 17,066
Likes: 3
From: Milpitas ca
I once had something similiar. My problem was I had a slow leak in my waterpump and that messed up my Opti. Leak was fixed and changed Opti to a Pro Billet. Not sure if this helps your case.
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
Update:
I started my vette (jumped it again), drove it about 2 miles to Sears to have them check the battery (not charging)... Battery was bad, so sears replaced the batter under warranty - YES !!
So I'm thinking maybe this was the problem, NOPE !!! The car does its lil jiggly shake right as I was passing a shop. I asked the guy to put a fuel filter in, he said he'd do it for $20 if i got the filter. Autozone filter didn't work, so i'm going to get ACDelco tomorrow. When he removed my old filter, he said it looked NEW !!! I told him i want him to replace it anyway. He's also gonna replace the fuel pump.
So is it standard when removing the fuel filter that expels air pressure along with gas...?? Mine did, and the mechanic questioned that much air. He suggest its gonna be the fuel pump.
Here's my question: The Corvette book I have says the fuel pump is right near the top of the gas spout... The mechanic says its not, it may be in the gas tank. Which one is correct?? Any other advice about the car??
Also, I have a 91 Corvette, with a 94 LT1 engine, should the gas filter be 91 or 94, or does it matter..?? Same with the pump..??
Thanks guys..
I started my vette (jumped it again), drove it about 2 miles to Sears to have them check the battery (not charging)... Battery was bad, so sears replaced the batter under warranty - YES !!
So I'm thinking maybe this was the problem, NOPE !!! The car does its lil jiggly shake right as I was passing a shop. I asked the guy to put a fuel filter in, he said he'd do it for $20 if i got the filter. Autozone filter didn't work, so i'm going to get ACDelco tomorrow. When he removed my old filter, he said it looked NEW !!! I told him i want him to replace it anyway. He's also gonna replace the fuel pump.
So is it standard when removing the fuel filter that expels air pressure along with gas...?? Mine did, and the mechanic questioned that much air. He suggest its gonna be the fuel pump.
Here's my question: The Corvette book I have says the fuel pump is right near the top of the gas spout... The mechanic says its not, it may be in the gas tank. Which one is correct?? Any other advice about the car??
Also, I have a 91 Corvette, with a 94 LT1 engine, should the gas filter be 91 or 94, or does it matter..?? Same with the pump..??
Thanks guys..
Instructor
Joined: Oct 2007
Posts: 248
Likes: 0
From: Rocklin CA
You have lots of input here and let me add another. My 90 had a similar problem that turned out to be bad fuel injectors. Had to take it to the dealer to have several replaced. It was expensive so I hope that is not your problem. Most of the expense is the labor getting to them so I probably should have had all of the injectors replaced when they were in there but money was tight so I didn't. Been holding my breath since then.
Good Luck
Good Luck
Thread Starter
Intermediate
Joined: Sep 2002
Posts: 31
Likes: 0
From: Landover Maryland
$300 on parts and labor for nothing... Replaced the fuel filter and the fuel pump and its still doing the same thing..... Great !! The mechanic said that it could be the catalyic converter !!!??? Huh, its a lil old, it makes a lil noise down there when its about to kick out of gas....but the cataylic converter???
Any thoughts on this is appreciated......
Don
Any thoughts on this is appreciated......
Don