1995 Vert has issue
Thread Starter
Pro
Joined: Mar 2005
Posts: 722
Likes: 70
From: Fla
1995 Vert has issue
I recently bought a 33k mile 1995 corvette convertible. the issue is when I am cruising around 40 mph, the car slowly wants to stop applying power, like a fuel issue or something, and when I push the gas it will sputter and not accelerate until it gets slower and slower. I pull off the road and turn it off. I turn it back on and problem is gone. the car never dies just slowly slows down not letting me accelerate. could this be bad gas, bad fuel filter, fuel pump etc... the car has new injectors by previous owner, new alternator and a new starter I put today.. when its under power it runs great. this just happens all of a sudden. It may not happen at all one day and get me the next. no smell of gas. ideas??
thanks.
thanks.
Pro
Joined: Jan 2003
Posts: 706
Likes: 47
From: Denver Colorado
It would be interesting to see the fuel pressure reading when it is running poorly as this sounds like a fuel delivery issue: pump, filter in tank, filter in line kind of thing. I'm not sure you can do it on a '95 however, on an '84 you "can" put the in line fuel filter in backwards. If you do the interior cap can come off the fuel filter element and block the outlet. It has exactly the indications you give. You may be able to guess how I know that!
Thread Starter
Pro
Joined: Mar 2005
Posts: 722
Likes: 70
From: Fla
I am thinking its the fuel pressure regulator. it is definitely starving for fuel when it starts to bog and decrease in speed. I also read it might be the IAC whatever that is? Thanks for your comments. ed.
Pro
Joined: Jan 2003
Posts: 706
Likes: 47
From: Denver Colorado
IAC = Idle Air Control. Probably not the culprit as it is just an air bled to control idle speed. I'll bet you find the problem with a fuel pressure test.
Safety Car
Joined: Aug 2013
Posts: 4,427
Likes: 604
From: Minneapolis Mn
Just fYI.
Drifting
Joined: Jun 2002
Posts: 1,305
Likes: 11
From: Savannah Ga.
I recently bought a 33k mile 1995 corvette convertible. the issue is when I am cruising around 40 mph, the car slowly wants to stop applying power, like a fuel issue or something, and when I push the gas it will sputter and not accelerate until it gets slower and slower. I pull off the road and turn it off. I turn it back on and problem is gone. the car never dies just slowly slows down not letting me accelerate. could this be bad gas, bad fuel filter, fuel pump etc... the car has new injectors by previous owner, new alternator and a new starter I put today.. when its under power it runs great. this just happens all of a sudden. It may not happen at all one day and get me the next. no smell of gas. ideas??
thanks.
thanks.
I love these threads, this give me (a pure novice) a chance to give advice like I'm a real corvette expert. But opti symptoms i know quite well I have replaced 6 on my 94 over the course of 20 years.Its your Opti:
Racer
Joined: Nov 2011
Posts: 274
Likes: 12
From: Louisburg NC
Sounds like fuel to me.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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
5th Gear
Joined: Aug 2017
Posts: 5
Likes: 0
From: KC metro
I had a similar problem with my '94. The fuel pressure regulator(FPR) was good, the fuel pressure was within spec and held pressure for hours after shutdown, and the fuel filter was changed 20k miles ago. The culprit was a faulty fuel pump relay, which is located behind the passenger-side dash. It worked intermittently, causing stalling when the engine came up to operating temperature. $12 later, problem solved.
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
I've got a 95 just like you. Sounds more like a fuel delivery problem to me.
A fuel pressure gauge rigged up so that you or a friend can see it when the problem manifests itself will be a good (inexpensive) test.
Your C4 is not a car that you want to throw parts at trying to solve a problem.
You have more testing before you determine that it needs a replacement opti. I've driven my 95 more than 50,000 miles in the rain and no opti problems. (it rains here almost every single day 7- 8 months of the year)
A fuel pressure gauge rigged up so that you or a friend can see it when the problem manifests itself will be a good (inexpensive) test.
Your C4 is not a car that you want to throw parts at trying to solve a problem.
You have more testing before you determine that it needs a replacement opti. I've driven my 95 more than 50,000 miles in the rain and no opti problems. (it rains here almost every single day 7- 8 months of the year)
