Something's not right. Possible meth problems....
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Yes I have a whole new set here. At the time we only swapped out the known bad plug. When I replace the plug wires I'm also going to replace the rest of the plugs just to make sure they are all new and good to go.
Last edited by FYREANT; Dec 26, 2015 at 08:37 PM.
Safety Car
Joined: Oct 2003
Posts: 3,838
Likes: 85
From: DFW Texas
Yes I have a whole new set here. At the time we only swapped out the known bad plug. When I replace the plug wires I'm also going to replace the rest of the blogs just to make sure they are all new and good to go. Yes I have a whole new set. At the time we only swapped out the known bad plug. When I replace the plug wires I'm also going to replace the rest of the blogs just to make sure they are all new and good to go
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
Pulled the valve covers tonight to check the valve springs to make sure none are visually broken or cracked. All of them look ok. I tried wiggling them all too and none of them move at all. I may try to do a compression test in all the cylinders tomorrow for peace of mind since I will be replacing all the plugs anyway. I am still waiting for the plug wires to arrive. They should be going out Monday I believe. I should have them mid week or so..
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Melting Slicks
Joined: Dec 1999
Posts: 2,049
Likes: 702
From: Tulsa, Ok
Pulled the valve covers tonight to check the valve springs to make sure none are visually broken or cracked. All of them look ok. I tried wiggling them all too and none of them move at all. I may try to do a compression test in all the cylinders tomorrow for peace of mind since I will be replacing all the plugs anyway. I am still waiting for the plug wires to arrive. They should be going out Monday I believe. I should have them mid week or so..
After an exhausting sear, I learned it's best to gap the plugs at .037.
I used thin tipped needle nose pliers. Use good light and extra care - open a slight bit over and for fine tuning, tap closed with the butt of a screw driver. That's how I did it and my car seems to like .037
I don't know which wires you went with? A bit late to offer advise but, here's a good thread for you to research.
https://www.corvetteforum.com/forums...nd-w-pics.html
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
After an exhausting sear, I learned it's best to gap the plugs at .037.
I used thin tipped needle nose pliers. Use good light and extra care - open a slight bit over and for fine tuning, tap closed with the butt of a screw driver. That's how I did it and my car seems to like .037
I don't know which wires you went with? A bit late to offer advise but, here's a good thread for you to research.
https://www.corvetteforum.com/forums...nd-w-pics.html
I used thin tipped needle nose pliers. Use good light and extra care - open a slight bit over and for fine tuning, tap closed with the butt of a screw driver. That's how I did it and my car seems to like .037
I don't know which wires you went with? A bit late to offer advise but, here's a good thread for you to research.
https://www.corvetteforum.com/forums...nd-w-pics.html
Racer
Joined: Feb 2014
Posts: 457
Likes: 10
From: Baxter Kentucky
I had a similar problem a while back and it was water in the gas , Just a thought .What made me think about it was ,you said it comes and goes. I drought you have a cracked valve spring , if i cracks it brakes. Have you noticed any valve train noise ? Usually if you brake a valve spring you will have valve train noise, And where on the coil around the spring did it brake would determine how bad it would be . If it broke in the middle you most likely have dropped a valve and blown the engine. And also, make shore the plug wire end that goes to the coil (clicks twice) if they dont, you will get a misfire.
Pro
Joined: Nov 2014
Posts: 687
Likes: 83
From: Fort Worth Texas
I had a similar problem a while back and it was water in the gas , Just a thought .What made me think about it was ,you said it comes and goes. I drought you have a cracked valve spring , if i cracks it brakes. Have you noticed any valve train noise ? Usually if you brake a valve spring you will have valve train noise, And where on the coil around the spring did it brake would determine how bad it would be . If it broke in the middle you most likely have dropped a valve and blown the engine. And also, make shore the plug wire end that goes to the coil (clicks twice) if they dont, you will get a misfire.
Racer
Joined: Feb 2014
Posts: 457
Likes: 10
From: Baxter Kentucky
Thanks, I have built a few LSX engines in my life ,lol... I'm starting on a 2013 Grand Sport next week for a engine rebuild
Thread Starter
I'm Batman..
Joined: Apr 2014
Posts: 6,143
Likes: 921
From: Lehigh Acres FL
Tech Contributor
I had a similar problem a while back and it was water in the gas , Just a thought .What made me think about it was ,you said it comes and goes. I drought you have a cracked valve spring , if i cracks it brakes. Have you noticed any valve train noise ? Usually if you brake a valve spring you will have valve train noise, And where on the coil around the spring did it brake would determine how bad it would be . If it broke in the middle you most likely have dropped a valve and blown the engine. And also, make shore the plug wire end that goes to the coil (clicks twice) if they dont, you will get a misfire.
Racer
Joined: Feb 2014
Posts: 457
Likes: 10
From: Baxter Kentucky
Do you or any body you know have a hand held data recorder , like EFI Live or HP Tuner so you could record the data and catch the stumble or misfire .That would tell you if it was electrical or lead you to a mechanical problem , These E92 ecm's can really break down faults and lead you to the problem . I never go out with out my EFI Live V2 hooked up if I'm going to play. I also Have the Alkey Meth but a single nozzle & A&A SC . I guess you are running 100% meth right ? not a mix.
Racer
Joined: Feb 2014
Posts: 457
Likes: 10
From: Baxter Kentucky
Does your tuner have some experience with the E92 ecms with the LT1 ? You could have problems with axle or engine torque management & throttle management or timing controls. You would not believe what the engine & axle torque controller will do to you. To bad we dont live closer , i would hook my laptop to it, and we would find to culprit.
Racer
Joined: Feb 2014
Posts: 457
Likes: 10
From: Baxter Kentucky
Also , i read where you said your tune is dedicated to Meth, If you get you a programmer like i have , You can have your tuner build you a tune with meth and with out meth , Thats what i have . So went I'm on a long trip , like going to Florida on vacation and run out of meth , i Just install the no meth tune and every thing is fine.
Melting Slicks
Joined: Dec 1999
Posts: 2,049
Likes: 702
From: Tulsa, Ok
Does your tuner have some experience with the E92 ecms with the LT1 ? You could have problems with axle or engine torque management & throttle management or timing controls. You would not believe what the engine & axle torque controller will do to you. To bad we dont live closer , i would hook my laptop to it, and we would find to culprit.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Also , i read where you said your tune is dedicated to Meth, If you get you a programmer like i have , You can have your tuner build you a tune with meth and with out meth , Thats what i have . So went I'm on a long trip , like going to Florida on vacation and run out of meth , i Just install the no meth tune and every thing is fine.
On a port injected motor, the injector sprays against a closed exhaust valve all the while the exhaust valve is open and it doesn't matter. You lose a bit during overlap but that is a brief moment of time vs half the exhaust stroke on a DI motor.
On a basic kit with 550-600 rwhp there is no issue.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
FyreAnt, this is going to be almost impossible to diagnose without seeing the tune. You are welcome to email it to me via PM comm.
How much power did you put down? You could very well be spraying through the spark event and depending on what the tuner did with some of the spark retard tables, the ECM may not have the authority to retard spark enough to keep it lit.
How much power did you put down? You could very well be spraying through the spark event and depending on what the tuner did with some of the spark retard tables, the ECM may not have the authority to retard spark enough to keep it lit.