LT1 EFI Question

[peter paul fenske]

Hi Ron

Most current measurements can be defeated by resistor
subs.. Note actuators are rated at 20 ohms. I use 100
ohms to keep the heat down. Don't use 1/8 watts resistors.

I now remember the air pump. You will have to keep the relay
I think. The pcm checks that the relay applies voltage
to the air pump.. similiar to fuel pump voltage check..

EGR is tougher. the resistor will defeat the current check
but not the operation check. Ie the pcm applies egr then checks
for drop in map. 

I beg to differ with obd11 implementation. I have looked at a
92 pcm and obd11 is there. It is simply not used ie obd11 errors
are noted and not reported. You would need a "HUD" to see it.

I guess if all else fails someone can reprogram the pcm. I am
not currently able to do this. Generally people will do
this for a bit of cash. but don't ask yer dealer to do this.
later:peter

At 06:37 AM 4/2/98 +0000, you wrote:
>> Sounds like it is failing part of the self diagnostics, and turns the
>> fan on.  OBDII I'm not too familiar with.
>> Do you have a scan tool, or can you have someone scan it for
>> codes etc??..
>> Got to get accurate info for diagnosing, at this stage anything
>> is quessing.
>> No worries mate
>> Bruce
>
>
>  This PCM is not OBDII. I Have a scanner. The codes are... EGR, air
>pump, canister purge, shift indicator, MIL lamp, and speedo (havent
>decided on a solution yet). There are no other codes. All sensors seem
>to be working in there intended range. The A/C doesnt exist.  Does
>everybody agree on the 100 Ohm res. that Peter mentioned? 
>
>Thanx everyone for your quick replies (you too P.Rusch :)
>-- 
>Ron & Stephanie Tyler
>'72 LT1/T56 240Z
>http://www.whit.org/jcaudle/LT1-3.jpg
>
>