Dieseling with 2007 LS2 M6 Vette using E-Force
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
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From: South of the Mason-Dixon
Dieseling with 2007 LS2 M6 Vette using E-Force I'm experiencing dieseling with my E-Force and I'm looking for others who have this problem. I have located 2 other people with this issue. I'm looking for a solution.
The dieseling event is around 2 seconds. After the ignition is tapped off, the rpms dive down toward 0, at 1 second of "decay" the rpms jump back up. I'll try to attach a screen shot of the scan. The entire shutdown event takes 1.94 seconds
The initial install was uneventful until the hand held tuner, that came with the kit, was used. The ECM became a paperweight for quite a few days until it could be revived and get the car to run.
We have tuned the car with MANY Edelbrock tunes and 2 private tuner's using MANY EFILive programs. The car runs perfect. It has NO other issues except it doesn't want to stop.
We've re-flashed the stock OS into the ECM and then edited the appropriate tables to run the SC, still dieseled.
We've pulled the SC and replaced the intake gaskets, still dieseled.
We've replaced the full set of injectors, still dieseled.
We've disconnected the evap line from the firewall, still dieseled.
Attachment:
diesel01 vertical bar shows ignition turn off
diesel02 vertical bar shows lowest decay of rpm before diesel event
diesel03 shows highest rpm during diesel event
diesel04 shows 0 rpm and end of shutdown
I'm looking for others that are experiencing this issue to compare notes and hopefully find a common solution to the problem. So, you need to have a 2007 LS2 M6 with the E-Force SC and you are experiencing a dieseling condition at shut off.
Elmer
The dieseling event is around 2 seconds. After the ignition is tapped off, the rpms dive down toward 0, at 1 second of "decay" the rpms jump back up. I'll try to attach a screen shot of the scan. The entire shutdown event takes 1.94 seconds
The initial install was uneventful until the hand held tuner, that came with the kit, was used. The ECM became a paperweight for quite a few days until it could be revived and get the car to run.
We have tuned the car with MANY Edelbrock tunes and 2 private tuner's using MANY EFILive programs. The car runs perfect. It has NO other issues except it doesn't want to stop.
We've re-flashed the stock OS into the ECM and then edited the appropriate tables to run the SC, still dieseled.
We've pulled the SC and replaced the intake gaskets, still dieseled.
We've replaced the full set of injectors, still dieseled.
We've disconnected the evap line from the firewall, still dieseled.
Attachment:
diesel01 vertical bar shows ignition turn off
diesel02 vertical bar shows lowest decay of rpm before diesel event
diesel03 shows highest rpm during diesel event
diesel04 shows 0 rpm and end of shutdown
I'm looking for others that are experiencing this issue to compare notes and hopefully find a common solution to the problem. So, you need to have a 2007 LS2 M6 with the E-Force SC and you are experiencing a dieseling condition at shut off.
Elmer
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
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Nothing to do with you, but im drunk, I can remember that my old 79 bronco would with a 400 modified would over heat alot, and when id shut it down, it would diesel for 5 seconds or more after shutdown. I can remember one time it did a bit longer and scared the **** out of me. 
Not funny in your case, but just thought id share
Not funny in your case, but just thought id share
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Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
Nothing to do with you, but im drunk, I can remember that my old 79 bronco would with a 400 modified would over heat alot, and when id shut it down, it would diesel for 5 seconds or more after shutdown. I can remember one time it did a bit longer and scared the **** out of me.
Not funny in your case, but just thought id share
Not funny in your case, but just thought id share
Oh I remember those days! Does the term Throttle Position Solenoid mean anything to you? That damn thing would push up on the throttle lever and set the idle at "key on" and when you turned off the car it would dive back down to get the throttle blades to slam shut in the carb to try and stop the dieseling monster on emission withdrawals!
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
Oh I remember those days! Does the term Throttle Position Solenoid mean anything to you? That damn thing would push up on the throttle lever and set the idle at "key on" and when you turned off the car it would dive back down to get the throttle blades to slam shut in the carb to try and stop the dieseling monster on emission withdrawals!
I hope you get her worked out man, sorry i couldnt help more.
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From: Your GF's pants
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
Give me a tweak to a table or something that'll shut that TB and stop this madness!
Elmer
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Joined: Nov 2010
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From: Your GF's pants
BUT it's HPT logic, not EFI Live. You can zero out the lowest portion of the RAF table but it isn't a promising fix, it just makes it so much better.
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
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From: South of the Mason-Dixon
Is that the accepted fix for this issue? Surely, toning down the symptom is good but can't the disease be cured?
Elmer
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From: Your GF's pants
We haven't got it figured out yet because the problem is "the tachometer resolution in your car is too fast and the ECM reads directly off it. Well as soon as the tach reports zero the TPS opens back up to default. In truth though when the teach reports zero ideally the engine is still turning 150 RPM and ignition voltage is put back to it for startup. The engine starts until the ECM realizes the key is still off and then dies." it is hard to tell the TB what to do with the key off
Thread Starter
Staging Lane
Joined: Mar 2002
Posts: 91
Likes: 0
From: South of the Mason-Dixon
Tried to pull back some air by:
Minimum Idle Flow table:
RPM
250 set @ all 0, dieseled
250 set @ all 0, 450 set @ all 0, dieseled
250 set @ all 0, 450 set @ all 0, 650 reduced 10% dieseled
250 set @ all 0, 450 set @ all 0, 650 reduced 20% dieseled.
It's starting to look hopeless on this.
Minimum Idle Flow table:
RPM
250 set @ all 0, dieseled
250 set @ all 0, 450 set @ all 0, dieseled
250 set @ all 0, 450 set @ all 0, 650 reduced 10% dieseled
250 set @ all 0, 450 set @ all 0, 650 reduced 20% dieseled.
It's starting to look hopeless on this.
