1 Meg Delphi computer

[Harrismarine]

Hi guys, I am trying to run the 1mb comp with cable throttle..... I have it all working and running on an engine but no matter how much I add to the VE table the motor runs super lean with no change in fueling at all. I am getting P0351 and P0654 coming up??? Something is stopping me adjusting fuel by the VE table, any thoughts??? When I change back to the 512mb one the engine runs fine and the tac starts working :doh2:
It is Maffless tune

Thanks Mike

[Taz]

Hello Harrismarine,

A little more information would be helpful:

What are the service number and hardware number on the 1 Mb LS1-B PCM you are trying to use ?
Where is the wiring harness you are using from ? (i.e. Camaro / truck / custom)
The 512 Kb PCM would use Blue / Red connectors, while the 1Mb PCM would use Blue / Green connectors. I take it you are switching these back and worth as you change PCMs, or have "trimmed" the Red connector to fit the 1 Mb PCM.

In trucks - most (but not all) of the pinouts are the same between model years - with the exception of the O2 sensors.

When you get a chance, please post both of the tunes you are using (512 Kb and 1 Mb).


Regards,
Taz