93 Cutting Out Intermintantly
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
93 Cutting Out Intermintantly
My 93 has started cutting out, at an increasing occurrence, this week. It will be running fine and then all of a sudden it's like someone just twisted the distributor a quarter turn.
I thought at first it could be bad gas. I had filled up Monday and that's when the first symptom started. It was more of a severe and sudden hesitation that day. I have ran most of the tank down and added both new gas (from a different station) and some Heat. Still the problem persists.
The opti was replaced about 3 years ago (around 15, 000 miles) as was the fuel filter. Someone mentioned to me that this was a symptom of a failing fuel pump. Is it?
I have yet to get under the hood. Any suggestions of where to start?
Eric
I thought at first it could be bad gas. I had filled up Monday and that's when the first symptom started. It was more of a severe and sudden hesitation that day. I have ran most of the tank down and added both new gas (from a different station) and some Heat. Still the problem persists.
The opti was replaced about 3 years ago (around 15, 000 miles) as was the fuel filter. Someone mentioned to me that this was a symptom of a failing fuel pump. Is it?
I have yet to get under the hood. Any suggestions of where to start?
Eric
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
If it isn't throwing code(s)...I'd put a fuel pressure guage on the schrader, tape it to the windshield and go for a ride. When it cuts out and the fp remains steady, then its probably ign.......if the pressure drops, then trouble shoot the fuel system.
Le Mans Master
Joined: May 2005
Posts: 7,354
Likes: 2,278
From: Central Maryland
When it misbehaves, does it misfire and/or backfire, or just act as though the fuel supply vanished?
Break the problem in half first. Determine whether it's a fuel supply problem, or an ignition problem, and then go after the trouble from there.
As others have noted, a fuel pressure test while the car is misbehaving will tell you a lot, and that's probably where I'd start.
Be well,
SJW
Break the problem in half first. Determine whether it's a fuel supply problem, or an ignition problem, and then go after the trouble from there.
As others have noted, a fuel pressure test while the car is misbehaving will tell you a lot, and that's probably where I'd start.
Be well,
SJW
Thread Starter
Race Director
Joined: Dec 1999
Posts: 11,813
Likes: 32
From: Work
St. Jude Donor '09
Well today it completely pooped out on me on the highway. I have yet to test the fuel pressure but I have a good idea that it may be ok. It acts like it's getting no spark at all. I can smell gas when trying to start it.
I'll try to test the fuel pressure this weekend. I'll keep you guys posted.
Thank you!
I'll try to test the fuel pressure this weekend. I'll keep you guys posted.
Thank you!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski