ECU change in a 98 have questions
 

The vehicle is a 99 but it's the same as a 98. I refer to it as 98 since 99 had both 5.7L and 5.3L engines in 2 different body styles. This is the Vortec 350.

We all know the crappy intake gaskets and CSFI

I want to change to either a complete RamJet 350 engine or change the intake to the Ramjet and use the Fast EZ-EFI.

My question is this. What have others done with the old ECU? For example, the speedo is driven by a modulated signal from the ECU.

I would like the gauges to work as they should with no noticeable difference and no "check gauges" light on.

I understand the SES light will be inoperative maybe.

Then of course there is the whole transmission deal which would have to switch to it's own controller. Ugh. There must be a better way.

Is the answer to use both the old and new ECU? New one for controlling engine functions and the old one for gauges and transmission control??????

Re: ECU change in a 98 have questions
 

Can anyone address this question?

Re: ECU change in a 98 have questions
 

Search results I found .
The first thread might give some answers.

........ http://www.google.com/custom?domains...D%3A1%3B&hl=en