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Hello all, I bought my HPT second-hand about a year ago from someone on LS1tech. The interface still had two cars worth of credits on it and I just used the second set on my truck last week. I bought...

I feel like there's some weirdness going on here.

The tune still isn't good but it'll cruise normally (AFR reads around Commanded) sometimes but then go really rich on the AFR gauge with no change...

Took the car to work this morning. I just learned how to turn on histograms (after I got to work obviously) but if you look towards the end where I WOT (around 8:07) it was super rich ~10ish...

Just ran it with the FF disabled and got a commanded AFR of ~15 (Engine was only 100*)

I'll do a proper drive tomorrow.

Thank you!!!

Look at all them settings :yay:

If I adjust the values at all in that table it says it's outside of the min/max limits. I was just going to make them all (0-100%) 14.681. Is that...

The only thing I see in the Fuel/General tab is "Injector Control - Flow rate (Flow Rate vs. KPA button)"

Do I need to be plugged into the car?

*edit* The Stoich entry is there on my LM7 ECU...

I disabled the Flex Fuel in a different tune but I just went back to stock because nothing was working.

One of my O2 sensors isn't plugged in so I can run the wideband. Can I force it into Open...

Hello, I've got a 99 LM7 5.3L with a 04 L59 5.3L DBW Flex Fuel harness/injectors/FPR/etc on it. The engine was running great with the LM7 harness and ECU

I'm really not sure what is going on here,...

Moved the ground wire for the coils, fired right up :doh:

Thanks, LS1tech!

Okay - good fuel pressure, injectors are opening. Pressure was holding at the rail, cranked it over and the pressure went down when cranking, exhaust smells like fuel.

Had the fiancee crank it...

Thanks! That must be it, will log again on my way home.

Hello,

I took a log of my 2002 Sierra LM7 5.3L this morning on the way to work. I can't figure out how to display the injector data. Is there something easy I'm missing?

Thanks

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I have swapped ECUs between my 1999 Silverado and 2002 Sierra with no issue, both cars worked fine on either ECU (both were drive by cable though). Mileage is not in the ECU for the trucks

Hello everyone!

I have a 1989 240SX with an 99 Silverado LM7 in it in front of a NV3500 manual trans. I've been running an OEM LM7 ECU for over a year with just VATS turned off. I found an uncut...