Time to get started 4.8 to 5.3

[farmtruc]

Come on Allen!!! This is the same thing my truck was doing. You sent me a retune with the IAC tables modified. You made changes to make the IAC valve close faster.

At least this is what you/employees told me. But, it worked so try and remember what you did and do it for this guy.

There's a big difference between his truck and yours.
You were complaining about basically a cruise control effect and idle sticking, hanging and slowly coming down and a slight high idle.
YOUR TRUCK ALSO HAS A CAM!
Which means I have to increase idle airflow and make other changes to idle.
HIS IDLE TABLES ARE COMPLETELY STOCK!

Don't you think if I thought it was the pcm i'd be sending out more pcms?

IT'S NOT THE SAME THING THAT WAS HAPPENING WITH YOUR TRUCK!

Thanks for posting my message, but I don't need a reminder of what was going on with yours.

[farmtruc]

There is a small hole drilled in the TB blade could this be the trouble?

That is normal to have a hole in the tb.

If you still think it's the pcm, which I'm not doubting, I've seen weird things in the past (but it's not the idle tables, like mentioned above), I can send you a stock pcm which will basically just have vats turned off (so no relearn is needed) and the injectors scaled for.

I've probably sent out more than couple dozen 80e swap and charger tunes just recently and no issues, and we've done this many many times before, so that's why I keep asking questions about the setup. Cause this is usually a straight forward easy tune.
Your current tune is just a 6L/80e file with adjustments for your mods, so it's nothing special.

shoot me a pm and let me know,
allen

[3DTIM]

PM Sent. Got a few thing to try today. Could not get any intake gasket today none of the GM dealers had any.

[3DTIM]

Anybody know were I can get my hands on a TB. No one around here sales them here. Just need to test with it.

[3DTIM]

Here is were I stand today. With the IAC plugged in 2000rpm unplug it drops to were it should be. Plug in 2000 unplug normal.

[George C]

is the IAC clean or real dirty? find another IAC

[3DTIM]

OK wrong on last statement if it is at 1000 it will stay there until I plug it back in and go up from there. And will not go back down until it has cooled off. Unplug it when cool and will idle fine. IAC is new and I cleaned the crap out of TB yesterday so all is clean.

[3DTIM]

So no one knows way the IAC is kicking the idle up like it is?

[RedHeartbeat]

Maybe its wired backwards, when its supposed to be closing its opening and visa-versa.

[3DTIM]

All of the wiring on my end is stock. But could the PCM be calling the wrong pin. It will be late Monday before I can get my hands on the Scanner and Scope.