I logged Bumpers truck today...two questions..

What is the normal operating range for oxygen sensors? His seem to me all over the place, but we have no idea.

At WOT from about a 50 punch his truck his truck acts funny. Before we thought the truck was downshifting and then unlocking the converter. But from looking at the log it looks like the TPS goes from 100% to ~30% and then back to 100%. Look at ~7:29 for an example.

 

Yeah, that's weird. Can you post his tune?

 

Does he have traction control?

 

I would, but we haven't licensed his PCM with HP Tuners yet.

He does not. Justin tuned it, would it be possible for him to either post the tune up or have him give it a look?

Thanks

 

You shouldn't need to license it to read/save the file, though I would ask Justin for permission to post the file since its his proprietary knowledge that went into the tune.

I will say the dip in TPS is odd.

 

With the multiple times in the log file that there is a 4-2 kickdown but that behaviour is not exhibited
Is it possible that his foot is being pulled off of the pedal? One way to confirm would be to log both the throttle position and accelerator pedal position simultaneously.

 

Nope, he had his foot in it the whole time. It really only does from 4-2 @ ~50mph. 4-2@70 doesn't do it.

 

i never let out any... and it only does it on the 4-2 around 50-55 or so... does it everytime too

 

Can you log both parameters? Never seen that happen aside from TC.

 

we might can do a short log file of it again