I wanted to change the following items with my ecm:
-I have changed the ring/pinion gears from 3.08 to 3.73 and added a T5 so I assume I will have to adjust the speedo.
-I want to kill the EGR circuit.
I know there's more but I can't think of it right now. My definition file is $3a.

 

Might just consider stepping up to the 6E code, and start fresh with that. You can probably count on one hand the people using something other then the 6E for the MAF systems.

 

For the speedo adjustment you will have to change the speedo gears in the tranmission tailhousing. There are two gears, a driven and a drive. A search of the tranny board will/should have additional info on which gears you need to use.

The only company I know of with tuning/editing software for that mask is Tunercat. However, as Grumpy mentioned can always upgrade the ECM & mask to the '165 & $6E.

RBob.

 

Where would I get ahold of the 165? What vehicles came with them? Does the 165 offer me better control than the 302? Also, I have already purchased the definition file $3a, tunercat software, programmer and eraser so I have the necessary equipment to change the code but I lack the direction in which I need to go.

 

Most devices may be turned off by setting the coolant enable threshold to a high value.

The '165 came in '86-'89 TPI f-bodys and along with some other vehicles.

RBob.

 

So for example, if I wanted to disable the EGR, there are these to constants:
EGR on TPS%
EGR off TPS%
To disable the EGR, would I set the EGR on TPS as high as it goes and the EGR off TPS to as low as it goes?

 

send me a bin file. make sure to virus scan it first please. there a nasty worm going around right now tearing up everybodys system.