Dead driver on '165?

[CSH-HQ]

If you don't have injectors pulsing apply a vats signal.
Yes they get toasty after a while.
If the MAP never varies from atmoshere then if codes.
  Once ya go to run drop the MAP,  ie apply ignition, and trip on the 
difffernt map/maf...
  Can't you disable the vats in the chip?.
Grumpy


>Here's what I've got, and I'm suspecting either the injector drivers or
>something else is fried in this ECM.  Note that I never actually ran it in
>a car.  I've checked most of the sources for a schematic of the '165 and
>haven't found any.  Is there one?  Again, this is '165 / ABYA (88 350 Camaro)
>
>My "test bench" consists of the ECM, all non-emissions related sensors
>(except for VSS) and all 8 injectors (note I'm using Ford injectors which
>tested ok on my 555 injector cleaner/tester).   I have the dist. hooked to
>a variable speed motor, I've been "cranking" the motor at about 100-300 rpm
>(dist speed) which corrolates to about 200-600 crank rpm.    MAF is hooked
>up, park/neutral line is tied +12, FP is also hooked up.  TPS is set a .5v
>
>On "cranking" the FP comes on and stays on until "cranking" stops.   IAC
>motor can be heard exercising slightly.   The injectors never fire, not
>even once.  Swapped in a noid light, it doesn't come on either.   I have a
>555 VATS eliminator tied to pin B6, I've tried frequencies ranging from
>about 20 to 40 hz (as determined by my o-scope).   With or without the VATS
>makes no difference in the operation below.
>
>Everything seems fine except for the fact that the injectors don't fire.
>The check-engine light (no scanner / aldl reader yet...) turns off
>momemtarily while cranking, then comes back on.    ECM is setting a code
>34;  low MAF reading. This is to be expected since there's no airflow....
>;^>  I've checked for power at all sensors and the MAF - it's there and good.
>
>The only other thing is that the main heatsink in the ECM gets fairly warm
>after about 10-15 minutes of power applied.   Is this normal?
>
>So are the injector drivers bad, or is there still something with the VATS?
>
>
>
>
>--> Bob Valentine
>--> bob at tecmark.com
>