finally threw a crankshaft position sensor code. it would only act up when i got back in truck from dropping my son off at daycare. weird. I let it idle for 1.5 hrs two different times and it would run just fine. Fuel pump, switch, nope. any way still cheaper than the dealer repairing it.

ps, if it ...

2005 silverado 1500 crewcab z71 5.3 died this morning while idling waiting to drop off my son at daycare. Wouldn't start backup. it will crank over but no start. took him inside, 5-10min later come back and try again. same thing,shut key off and tried again and it started. any ideas? runs fine other ...

you will have to install the stock tune before you send it in. When they reflash/program the unit it will erase the tunes on the handheld including the stock tune.

I looked at the tow/haul setting and followed it. I'm still playing with it now.

For example, on the downshift mph. if i am running 35 and cruising along the set point is 30mph. i need to pass and press harder on the accel. will it down shift or not. what happens upon raising/lowering the down shift setpoint.

Anyone else have any ideas? Mike????

Lew do you have any insight to this?

7193, 2005 chevy 4wd 5.3. Do you want the downshift mph up or down? What about the upshift?

also make sure you have your model selected.

2005 5.3l 4wd crewcab. Performance tune installed. Which firms up shifting? time or pressure? I can't remember which one the performance tune already adjusted. Turned fans on sooner to help with the ac.

I could be wrong but your vehicle does this the more you drive it. It constantly adjusted to changing conditions. The trick is to know whick variables you can/should change to get more power/mpg.

Is it normal to bounce between +1 and-1 on the slope. One was in 3rd and the other was in od (+1). I think i got the logs right this time.

Thanks on staightening me out. I'll try it again tonight. That log is in 3rd and I have another in od on the interstate. Is it ok to be in od or should we be in 3rd or 2nd just as long as the rpms stay as constant as possible.

It seems to run fine in dataviewer. I can run it and watch it there, is that normal?

Just read, the u7193 doesn't have afr.