Guys I REALLY NEED HELP this time!!!!!
Thread Starter
Advanced
Joined: May 2004
Posts: 92
Likes: 0
From: San Diego Ca
Guys I REALLY NEED HELP this time!!!!!
Alright guys, Heres my problem.
When I am driving and push down on the thottle far enough to kick it down, all the car does is choke until I let off the gas.
It backfired yesterday once or twice. I changed my plugs back to Bosch+4 from A/C delco, it seemed to make a small difference, The warmer it gets the worse the problem gets and less power I have. It seems like it wants to stall when I am stopped and in drive.
AND the oil smells a little like gas.
I dont have a clue what the hell it might be.
I have a cut air box, 1" spacer, 3 month old plug wires, new O2 sensor, new TPS...
ANY CLUES... I know I'm not the first for this,
Or does someone know a good Vette Mechanic in San Diego.
I am FINISHED......
When I am driving and push down on the thottle far enough to kick it down, all the car does is choke until I let off the gas.
It backfired yesterday once or twice. I changed my plugs back to Bosch+4 from A/C delco, it seemed to make a small difference, The warmer it gets the worse the problem gets and less power I have. It seems like it wants to stall when I am stopped and in drive.
AND the oil smells a little like gas.
I dont have a clue what the hell it might be.
I have a cut air box, 1" spacer, 3 month old plug wires, new O2 sensor, new TPS...
ANY CLUES... I know I'm not the first for this,
Or does someone know a good Vette Mechanic in San Diego.
I am FINISHED......
Melting Slicks
Joined: Oct 2002
Posts: 3,193
Likes: 1
From: Cincinnati Oh
well, initial impressions are that it's running rich:
gas in oil, stumbles on pedal mashing, black smoke out rear?
So look at the things that can cause it to be rich: Leaking injectors, faulty pressure regulator (slim %?), backfire, air or vacuum leaks (might be why it want's to stall out), or a misfiring cylinder(s) due to ignition problems...
Run the car, get it hot, try to rev it (under load while driving) as best you can and then shut it off and pull the plugs when it's had time to cool off. That should get us started. Also verify correct fuel pressure and bleed-down times after you shut the car off, and make sure all the grounds are solid, the plug wires are in the correct firing order, and then try to give us more details as to the symptoms- the more precise you are the better our answers will be!
gas in oil, stumbles on pedal mashing, black smoke out rear?
So look at the things that can cause it to be rich: Leaking injectors, faulty pressure regulator (slim %?), backfire, air or vacuum leaks (might be why it want's to stall out), or a misfiring cylinder(s) due to ignition problems...
Run the car, get it hot, try to rev it (under load while driving) as best you can and then shut it off and pull the plugs when it's had time to cool off. That should get us started. Also verify correct fuel pressure and bleed-down times after you shut the car off, and make sure all the grounds are solid, the plug wires are in the correct firing order, and then try to give us more details as to the symptoms- the more precise you are the better our answers will be!
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
If the oil smells like fuel, check the fuel pressure regulator vacuum hose. The diaphram may have ruptured causing the engine to flood out. The other cause could be a leaking injector. Its pretty easy to check the regulator, just remove the hose and see if there is fuel in it.
To check if you have a leaking injector, get a pressure gauge on the fuel rail. Then with the car not running cycle the key on, observe the pressure gauge. The pressure should come up to around 45 or there abouts, then it should level off and drop a couple pounts and hold. If it just steadily drops off then I would suspect a leaking injector or a faulty check valve in the pump.
To check if you have a leaking injector, get a pressure gauge on the fuel rail. Then with the car not running cycle the key on, observe the pressure gauge. The pressure should come up to around 45 or there abouts, then it should level off and drop a couple pounts and hold. If it just steadily drops off then I would suspect a leaking injector or a faulty check valve in the pump.
Melting Slicks
Joined: May 2003
Posts: 2,496
Likes: 1
From: alaska
any codes? could a convertor be plugged?
the fuel smell in oil is a good clue but still could be lots of things making it go rich.
i would change the oil immediately for starters.
heh was gonna suggest to post over in scan and tune but i see we're there.doh-this new forum layouts got me confused.
your in good hands here for sure.post more information and be patient... bummer man
the fuel smell in oil is a good clue but still could be lots of things making it go rich.
i would change the oil immediately for starters.
heh was gonna suggest to post over in scan and tune but i see we're there.doh-this new forum layouts got me confused.
your in good hands here for sure.post more information and be patient... bummer man
Thread Starter
Advanced
Joined: May 2004
Posts: 92
Likes: 0
From: San Diego Ca
I'm going to hook it up to a diagnostic machine today and read the computer, Hopefully I'll get it figured out today..
If not it goes to a Mechanic Monday. and I pay whatever has to be paid to get it fixed. Thanks guys...
If not it goes to a Mechanic Monday. and I pay whatever has to be paid to get it fixed. Thanks guys...
Racer
Joined: Jun 2004
Posts: 271
Likes: 0
From: Sacramento CA
Help Me Too!!!
Originally Posted by 91whiteconv
Alright guys, Heres my problem.
When I am driving and push down on the thottle far enough to kick it down, all the car does is choke until I let off the gas.
It backfired yesterday once or twice. I changed my plugs back to Bosch+4 from A/C delco, it seemed to make a small difference, The warmer it gets the worse the problem gets and less power I have. It seems like it wants to stall when I am stopped and in drive.
AND the oil smells a little like gas.
I dont have a clue what the hell it might be.
I have a cut air box, 1" spacer, 3 month old plug wires, new O2 sensor, new TPS...
ANY CLUES... I know I'm not the first for this,
Or does someone know a good Vette Mechanic in San Diego.
I am FINISHED......
When I am driving and push down on the thottle far enough to kick it down, all the car does is choke until I let off the gas.
It backfired yesterday once or twice. I changed my plugs back to Bosch+4 from A/C delco, it seemed to make a small difference, The warmer it gets the worse the problem gets and less power I have. It seems like it wants to stall when I am stopped and in drive.
AND the oil smells a little like gas.
I dont have a clue what the hell it might be.
I have a cut air box, 1" spacer, 3 month old plug wires, new O2 sensor, new TPS...
ANY CLUES... I know I'm not the first for this,
Or does someone know a good Vette Mechanic in San Diego.
I am FINISHED......
Just wanted to add:
*checked the fuel pressure and it is right on with what my Chilton says
*so fuel pump and regulator must be okay, right?
*the cats are starting to turn red-could be caused by running to lean, right?
*sounds like it is sucking too much air
*idle is perfect, timing is perfect, but when you hit the gas it floods itself out.
*not throwing any codes.
*******Please Help!!******
Last edited by vettebldr1; Jul 28, 2004 at 10:44 AM. Reason: added info
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
Instructor
Joined: Jun 2003
Posts: 126
Likes: 7
From: Markham Ontario
Has similar problems with my 88 L98........ In my case, I had a stuck (rock solid) EGR..... I was getting 15 mpg before, and after it was replaced, 22mpg.........dramatic difference.........
Symtoms were fuel smell, hard starting, hesitating at idle etc.......
Symtoms were fuel smell, hard starting, hesitating at idle etc.......
Racer
Joined: Jul 2004
Posts: 251
Likes: 0
From: Yarmouth ME
My expereince with Corvette mechanics in San Diego leads me to recommend Dave Meyer of Corvette Specialties. He's been at 3330 El Cajon Blvd for 20 years or more and 'vettes are all he does. His depth of knowledge is astounding, however, his mindset is that money is no object to make every corvette perfect and a showcar. He can fix it, but bring your bill fold.
