Hard bucking under part throttle?
Le Mans Master
Joined: May 2005
Posts: 7,362
Likes: 2,282
From: Central Maryland
You've already spent a lot of cash on parts that didn't solve your problem. I'd strongly recommend you take this car to a talented diagnostician who can get to the bottom of it, before you continue to throw still more money at parts. You'll come out ahead at the end. A good diagnostician who has a quality scanner and scope should be able to quickly isolate this fault.
Live well,
SJW
Live well,
SJW
Last edited by SJW; Dec 20, 2015 at 10:22 AM.
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 24
Likes: 0
You've already spent a lot of cash on parts that didn't solve your problem. I'd strongly recommend you take this car to a talented diagnostician who can get to the bottom of it, before you continue to throw still more money at parts. You'll come out ahead at the end. A good diagnostician who has a quality scanner and scope should be able to quickly isolate this fault.
Live well,
SJW
Live well,
SJW
I took the car to a "Corvette Specialists" here in San Diego, and they diagnosed the problem as wrong spark-plugs, said the double tip bosch plugs I had are the wrong kind. $300 and a 10 minute road trip down the road the problem continues. For a diagnostic and plugs.
Le Mans Master
Joined: May 2005
Posts: 7,362
Likes: 2,282
From: Central Maryland
It's funny,
I took the car to a "Corvette Specialists" here in San Diego, and they diagnosed the problem as wrong spark-plugs, said the double tip bosch plugs I had are the wrong kind. $300 and a 10 minute road trip down the road the problem continues. For a diagnostic and plugs.
I took the car to a "Corvette Specialists" here in San Diego, and they diagnosed the problem as wrong spark-plugs, said the double tip bosch plugs I had are the wrong kind. $300 and a 10 minute road trip down the road the problem continues. For a diagnostic and plugs.
If you can't stand to take it back there, ask around for referrals to a talented diagnostician who can isolate the problem before replacing anything, and who'll stand behind his work.
Live well,
SJW
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 24
Likes: 0
That's totally unacceptable. They should never have released the car to you as "fixed" until they'd verified it with an adequate test drive. If you can stand to let them touch your car again, I'd suggest you take it back and tell them that your $300 didn't buy you anything, and ask them to get to the bottom of it correctly this time.
If you can't stand to take it back there, ask around for referrals to a talented diagnostician who can isolate the problem before replacing anything, and who'll stand behind his work.
Live well,
SJW
If you can't stand to take it back there, ask around for referrals to a talented diagnostician who can isolate the problem before replacing anything, and who'll stand behind his work.
Live well,
SJW
With everything I've done to the car by now, I'm about 85% sure this issue is being brought on either by the MAF, ICM, or the Opti, to which I will replace accordingly.
Last edited by Torched94; Dec 20, 2015 at 03:34 PM.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Let me first say I did not read all the posts but I did read some like first and last page.
In voicing my opinion your initial symptom sounds like an opti problem. I have had this exact problem twice now. When it warms up it bucks in high gear, won't take the acceleration, idle wonders and smoothes out in a lower gear. That’s got opti written all over it and I just dont point to the opti casually.
Usually it's the cap and no codes will be set. You can look at measurements and waveforms all day long and see nothing unusual.
It cured my problem twice and elected to do the whole opti rather than the cap. I will also say in today's supply of parts I have heard it harder to get a quality optical unit in the opti but what you going to do and a decision or choice does need to be made. If the bearings are good, maybe the cap is an OK answer.
In voicing my opinion your initial symptom sounds like an opti problem. I have had this exact problem twice now. When it warms up it bucks in high gear, won't take the acceleration, idle wonders and smoothes out in a lower gear. That’s got opti written all over it and I just dont point to the opti casually.
Usually it's the cap and no codes will be set. You can look at measurements and waveforms all day long and see nothing unusual.
It cured my problem twice and elected to do the whole opti rather than the cap. I will also say in today's supply of parts I have heard it harder to get a quality optical unit in the opti but what you going to do and a decision or choice does need to be made. If the bearings are good, maybe the cap is an OK answer.
Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
Let me first say I did not read all the posts but I did read some like first and last page.
In voicing my opinion your initial symptom sounds like an opti problem. I have had this exact problem twice now. When it warms up it bucks in high gear, won't take the acceleration, idle wonders and smoothes out in a lower gear. That’s got opti written all over it and I just dont point to the opti casually.
Usually it's the cap and no codes will be set. You can look at measurements and waveforms all day long and see nothing unusual.
It cured my problem twice and elected to do the whole opti rather than the cap. I will also say in today's supply of parts I have heard it harder to get a quality optical unit in the opti but what you going to do and a decision or choice does need to be made. If the bearings are good, maybe the cap is an OK answer.
In voicing my opinion your initial symptom sounds like an opti problem. I have had this exact problem twice now. When it warms up it bucks in high gear, won't take the acceleration, idle wonders and smoothes out in a lower gear. That’s got opti written all over it and I just dont point to the opti casually.
Usually it's the cap and no codes will be set. You can look at measurements and waveforms all day long and see nothing unusual.
It cured my problem twice and elected to do the whole opti rather than the cap. I will also say in today's supply of parts I have heard it harder to get a quality optical unit in the opti but what you going to do and a decision or choice does need to be made. If the bearings are good, maybe the cap is an OK answer.
Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 24
Likes: 0
New optispark from Ecklers ordered, along with new coil but I sold the parts along with the car to a buyer over seas. I'm 95% sure it's the Opti at this point. I've tried everything else. It seemed to have gotten worse with time as well. No longer my problem though. Buyer knows what he's getting into at least.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
So I guess you're not doing he repair. But if you were, it's going to run so sweet you wouldn't let it go.
Having said that, you have made a decision to move forward and good for you. Is there another vette on the horizon.
Having said that, you have made a decision to move forward and good for you. Is there another vette on the horizon.
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Thread Starter
Heel & Toe
Joined: Nov 2015
Posts: 24
Likes: 0
