1st gen 3.4l supercharger.

I need help. She was running ok. For a year or 2. All of a sudden, she took a shit. Now she cranks and cranks and wants to fire but won't stay unless I press the gas. Does any one have a fuel map for the urd AIC/timing calibration computer I can try or have any suggestions I can try.

 

The URD ftc is essentially relabel split second ftc. That unit will only function under boost and will have nothing to do with cold start. You can actually unplug it and cause no harm to any components in case you’re wondering.

 

It's your IAC is stuck close. Adjustments are only needed to the Urd to retard timing in case of detonation. You will lose power by making your truck retarded.

 

There is not a removable iac valve on it. How do I fix that from being stuck closed? And I changed the spark plugs and oil, and she fired up and idled good. Then I shut it down came back out to start it up again and would not fire. I changed the oil because there was a lot of gas in it. Also maybe or not, but I relocated the battery into the bed.

 

Sounds like it could be a leaking fuel injector.

Also, the IAC valve is mounted on the underside of the throttle body, not on the SC. Remove the TB to access the IAC.

 

Thanks. I'm cleaning the injectors and I'll clean the IAC while I have it out

 

Your 03 does not have an IAC valve if it has electronic throttle control. A few very early 03s still had an IAC.
If the t body has a small blank rectangular plate on the top it's the ETC version without an IAC.

 

It is the one without an IAC. So now any other suggestions will be helpful. It is getting frustrating.

 

Anyway to do a quick bypass of the piggyback? Would be useful to be able to totally remove that from the equation. Its one reason I'd like to un-do my larger injectors and go with a RRFPR instead so that I can easily bypass my piggyback sometimes.