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ok, made the suggested changes to the tune. Re-flashed to vehicle, started it and everything sounded great. He calls me this morning, and said its back doing the same thing. Chuckling/loping idle....

Thanks for the insight guys. Made changes to tune, will go out and reflash shortly. Ill post up results.

Thanks again!

Ok, I'm a novice on HPT, so be easy on me. Working on Father-in-laws C3500. I have tried my own 20/20 tune, but wasn't happy with results, too "peaky". So I followed the "McRats 20/20" guide and...

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BTW, Here is the tune I am ready to load. Please feel free to critique.

Question for mechanicman.
I am working on my first tune on an 05 LLY/Allison C3500 that pulls an RV (15k) anywhere from sea level to approx. 14k ft elevation (in Texas, New Mexico). I have...

Thanks for response, but I need to clarify. My error occured on first read of VCM, I actually put scan in previous post, but I was actually doing an initial read. Will closing the status bit window...

"Object reference not set to instance of an object"
still getting this error when starting a VCM scan. Sent an error report. Any news n how to fix?

Very interesting read. Thanks, Mowton!

Well shoot. They already issued them to us. They are the basic Surface 2. Not Pro.
Any other options?

Company just bought us new Surface 2's. Said they were the next laptops. Any thought on an app? or something so they can be used?
Really love the Surface, just wish I could use HPT on it. Just my...

Searched for two days with no answer, so I'll ask another dumb question. On my 2003 Silverado with a 6.0, The current (stock) calibration has the A/F setpoint at 14.68:1. We are 99% E10 around...

Thanks for quick reply. Makes sense.

First Post, Been searching for days, I'm still very new at computer tuning, but have 25+ years building hotrods. Anyway,
Looking around in the program, and I see a table for High Octane Spark, and...