Idle too rich on 2007 LS2 Corvette with e-force supercharger

[Jimmy]

Hello,

After the supercharger was installed I loaded Edelbrock's tuning and the engine was running really badly and dieseling .
To be sure the problem was not a mechanical problem, I loaded the stock file with HPtuners and it was running very well at idle and no dieseling!

I modified the tuning of Edelbrock
- High and low octane spark table
- Changed all Idle values to stock values

It's really better but the idle is still too much rich and, when I stop it sometimes it's still dieseling. I am sure It's because there's too much gas on Idle if I stop it after a ride no dieseling, but if I stop it after a few minutes of Idle it's dieseling

I am new in tuning and don't know the fuel tables I must modify to resolve my problem, I don't want to be too much lean...

Here are a log with the stock tune before the supercharger installed (perfect Idle)
A log with the supercharger and Edelbrock tune, (Idle too rich)
A log with the supercharger and stock tune (Idle too lean)

Thanks for your Help !

[edcmat-l1]

Need to post the tune or tunes.

[Jimmy]

Here is the last tune...

Thanks

[Jimmy]

Please help, do you need another file ?

[doc350]

you might want to check the wiring on the supplied MAF/MAP harness. i have had an issue with the wires being pinned backwards from edlebrock.

i just installed a kit on an 06 vette last week and ran into this issue. edlebrock even admits that they have had problems.

[realcanuk]

you might want to check the wiring on the supplied MAF/MAP harness. i have had an issue with the wires being pinned backwards from edlebrock.

i just installed a kit on an 06 vette last week and ran into this issue. edlebrock even admits that they have had problems.

I had this issue when installing my eforce but the car wouldn't run at all until I got the wiring issue figured out.

[Jimmy]

I will check the wiring, thanks !

[doc350]

I had this issue when installing my eforce but the car wouldn't run at all until I got the wiring issue figured out.

same here, but who knows. its worth checking. i would hate to be over the tune, and have it be something else entirely.

[Nodnarb]

Stock tune with the blower shows -27*C IATs!!

[realcanuk]

Stock tune with the blower shows -27*C IATs!!

Are you in the artic ??

[yonson]

Stock tune with the blower shows -27*C IATs!!

Stock as in GM? If so your calibration needs to be updated for the TMAP sensor you are using...

http://www.edelbrock.com/automotive_...rce_tmap.shtml

[Jimmy]

The wiring seems to be OK. I am still looking. When I unplug the PCV hose, Idle is lean when I squeeze the hose I can have a perfect short term and long term fuel trim but I don't want to make a vacuum leak...

[HoP]

Jimmy post logs when the vehicle is at temp. Is the behavior the same at 180F vs 138F. When trying to diagnose problems you need as much data as possible. Start the car and data log it from a cold start till it comes to temp. Then post the log for review.

[Jimmy]

Thank you, I think I found something, I reduced the value of the minimum injector pulsewidth and my Idle is no more too rich and less dieseling !