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Yes, the car has a wideband installed.

More info on the injectors: Holley 250R150A 42lb/hr

I'm posting the pcm data from the Durango. Hope someone can offer some advice.
The first two attachments are screen shots of the VCM editor display.
The next two attachments are the download of the...

Thanks for the reply.
Your right it has a Kenne Bell supercharger.
Didn't know about the extra injectors or the piggyback pc.
Got some information from the owner.
Found out that the piggyback...

New to this group and a novice tuner.

Working on a 1999 Dodge Durango SP360.

Running very lean, ie) 17-18 at idle and around mid 20's above 1000rpm.

Has a larger throttle body (plug & play),...

1999 Dodge Durango SP360. Running very lean. ie: 17-18:1 at idle, the jumps to over 20:1 over 1000rpm.
Where should I start looking?
Thanks, John