DOH #1 I forgot the TCM uses the crank sensor for engine RPM sensing. In theory, you could split the stock analog signal, but its a rather weak signal, and might not register properly on either device (TCM or standalone).

Duh!! #2 The stock ECU/TCM combo won't like the conversion over to the digital sender that's required for the Haltec.

Nevermind... next-time I'll think the problem through before typing and opening my yap. frown

 

dont worry dude, we're all only human smile.gif

i have thought about this alot previously, before i got
the haltech.
even more so for you guys, because your stock ecu does
quite a few things.

the only function i am missing now is my evap purge.
and if i knew its purge conditions, i could make it happen.

so my stock ecu is on a shelf in the garage, its the only real option

 

Im going with the microtech LT-8.
Talked to scrud, he said the only function he lost that that stock ECU did, was idle control.

Thanks again for the replies!!

[ April 08, 2003, 05:26 PM: Message edited by: QS ]

 

That would suck not having idle control.
I'd have to say its one of the most important drivability
factors of the ecu.
Trust me, I have none at the moment smile.gif

Bry

 

Yeah, I'm definately with Bry on that one. I'm actually surprised they don't have an idle control method in that ECU; you might actually recheck that. Idle speed controllers don't ONLY help your idle wink as Bry and I are already well aware.

But as we've both found, it's still useable. Just a little annoying during times smile.gif

 

Please explain.
If you dont mind, both Red & Bry.

[ April 09, 2003, 12:36 AM: Message edited by: QS ]

 

The idle speed controller does quite a few things.

The basic principle of it is to keep the idle rpm to
a steady state, by regulating the ammount of air
that is bypassing the Throttlebody when the throttle plate is closed.

It can work in both directions, i.e it can increase or
decrease the ammount of air, therefore increasing or
decreasing the speed of the engine.

This can help for example with cold running.
The idle speed controller can let a little more air
in to increase the rpm at idle.

It can also assist with cranking the engine, the controller
can let more air in, like giving it a little gas while cranking, and leveling out once fired up.

The other main benefit of an ISC is to help stop rev drops
from things like electrical and mechanical loads on the engine.
If you turn your headlights or A/C on, you get a change in rpm.
The ISC can adjust for this and make your idle steady
at 800rpm, or 850 etc with A/C on, and prevents stalling.


It is as I said, a driveability issue.
If you want a drag car, forget about an ISC, but
if you want a daily driver, drivability is utmost!