I have done several mods including an LT1 swap into my 84 z28, hotcam and headers as well as bored out the cylinders. Turns out I will need to tune my engine to make it run properly due to all of my mods. I have never even thought about tuning my own car, but since I have a 94 PCM and harness setup for my LT1, I think it will loose the tune each time I disconnect the battery. considering I am constantly doing upgrades, I disconnect the battery a lot.

Should I try to tune it myself or take it to a local tuner? I figure if I do it myself, I can always reset the tune after reconnecting the battery.

Is tunercat tuning kit (I want the cable connection too) going to be able to handle all of my mods? Can I do this myself? Any help with this would be greatly appreciated. Fuel lines are going in tonight and with the exception of the tune, should be running this weekend.

 

Being a DIY board we all vote for you to tune it yourself.

Disconnecting the battery won't lose the tune. Will lose some of the long term fuel trims, but they will be quickly relearned once up and running again.

Not sure, but a '94 LT1 PCM is likely flash based (versus a chip). If so you need to have a solid power supply for it when flashing in a new calibration. This early flash PCM cab easily be made into a door stop if power dips or is lost during flashing.

RBob.

 

Wow, thats a releif. Tuning it in town is $500. I'll have it done there. I'd rather them do it than try to make this work on my own. I'd turn the whole engine into a doorstop. Thanks again.