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Dieseling condition with e-force?

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Old Sep 28, 2010 | 05:01 PM
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Default Dieseling condition for 2007 M6 with e-force?

Anyone getting dieseling at shut off? I have it and we're trying to figure out if this has happened to anyone else or if I'm just a really lucky guy.


LS2 with e-force kit.



Elmer

Last edited by eboggs_jkvl; Mar 24, 2011 at 02:57 PM. Reason: Fine tune of problem in title
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Old Sep 28, 2010 | 05:04 PM
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I can't believe that has anything at all to do with the fact that you have a s'charger on top. Maybe tune related or a problem with the install.
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Old Sep 28, 2010 | 05:06 PM
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Originally Posted by old motorhead
I can't believe that has anything at all to do with the fact that you have a s'charger on top. Maybe tune related or a problem with the install.

Well, that's why I'm asking.

It didn't do it prior to the install. Now it does. I'm looking for ideas on how to find and fix.
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Old Sep 28, 2010 | 05:24 PM
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that can easly be tuned out
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Old Sep 28, 2010 | 05:39 PM
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Originally Posted by cencalc6
that can easly be tuned out

Fine, what table do I modify?
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Old Sep 28, 2010 | 07:24 PM
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Hi Elmer,
My 07 does NOT have any dieseling issues.

Jeff
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Old Sep 28, 2010 | 07:31 PM
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Doesn't PCM cut fuel and spark when you turn engine off? You'd have to have a fuel leak amongst other issues.


Mike
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Old Sep 28, 2010 | 08:30 PM
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Tune related. It's probly not just 1 table.Hard to say without scanning it ect.
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Old Sep 28, 2010 | 09:13 PM
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Originally Posted by Skunkworks
Doesn't PCM cut fuel and spark when you turn engine off? You'd have to have a fuel leak amongst other issues.


Mike
Yup. Old carburated cars could "diesel" because the carb would keep letting fuel in no matter what... On a modern car shutting the ignition off turns off the fuel pump, the fuel injectors and the coil packs; it should be completely impossible for it to diesel...
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Old Sep 28, 2010 | 09:24 PM
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Edelbrock #1591 kit on my LS3 since the end of this past March...no dieseling here. I've tuned at least a dozen LSx motors and never had one diesel. As mentioned above, on shutdown the car kills the fuel pump, the coils and the injectors....strange
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Old Sep 28, 2010 | 09:34 PM
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Originally Posted by Motorhead-47
Edelbrock #1591 kit on my LS3 since the end of this past March...no dieseling here. I've tuned at least a dozen LSx motors and never had one diesel. As mentioned above, on shutdown the car kills the fuel pump, the coils and the injectors....strange
... none on my 1590! I did notice that happened once when they were tuning it... not sure why but I heard it! Doug at ECS kept tuning and when he was finished there wasn't any of it. Some how it must be related to tuning.... I would call Doug at ECS if you can't get it stopped..... I'm sure he'd help your tuner!

Last edited by cthusker; Sep 28, 2010 at 09:43 PM.
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Old Sep 28, 2010 | 09:39 PM
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?Pig rich at idle?...My W.A.G. Car needs to be scanned and see at a minimum what fuel trims are trying to do.
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Old Sep 28, 2010 | 09:47 PM
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Did u use the e-force box tune ??
I heard that they had problems with boxed tune
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Old Sep 28, 2010 | 09:49 PM
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Originally Posted by TMRoc
Did u use the e-force box tune ??
I heard that they had problems with boxed tune
He was one of the guys who had problems with the LS2 tune. IMHO the guys who worked on his car lacked the necessary expertise to set up his car properly on their own. Who knows what is in his ECU!

He needs to make a road trip down to Ian at The Tuning School and get it squared away.

Last edited by Motorhead-47; Sep 28, 2010 at 09:52 PM.
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Old Sep 28, 2010 | 10:04 PM
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Originally Posted by Motorhead-47
He was one of the guys who had problems with the LS2 tune. IMHO the guys who worked on his car lacked the necessary expertise to set up his car properly on their own. Who knows what is in his ECU!

He needs to make a road trip down to Ian at The Tuning School and get it squared away.
Sounds like a good plan to me..
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Old Sep 28, 2010 | 10:15 PM
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Originally Posted by Motorhead-47
?Pig rich at idle?...My W.A.G. Car needs to be scanned and see at a minimum what fuel trims are trying to do.
I think that's a good WAG! When mine was first started ECS had the stock tune.. never used Edlebrock at all. I remember hearing it's running SUPER rich from the tuner.. before he started making adjustments. That's when it dieseled.. BEFORE he started doing all this adjustments!
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Old Sep 29, 2010 | 12:04 PM
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Could be the boost a pump...
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Old Sep 29, 2010 | 12:19 PM
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Originally Posted by yonson
Could be the boost a pump...
That's interesting... How so?

I'm not rich (my LTFTs are almost 0 at idle prior to shutoff.)


So, what could the BAP be doing to influencing this? If it is, I'll get rid of it immediately.


Elmer
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Old Sep 29, 2010 | 12:32 PM
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Possibly a wiring or a grounding issue with it, especially if it's wired so that it's on all the time. I would try bypassing it and see if you still have the issue.
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Old Sep 29, 2010 | 01:21 PM
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Originally Posted by yonson
Could be the boost a pump...
Even if the BAP was commanding full power to the fuel pump no matter what, you'd still not have a running engine since that requires the PCM to tell the fuel injectors to fire and the coil packs to produce a spark. No injector signal = no engine running. No ignition signal = no engine running either...

Not to mention the fact that if the BAP really didn't shut off it'd burn itself out.
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