3800 motor swap, computer trouble

[Programmer]

-----Original Message-----
From: David A. Cooley <n5xmt at bellsouth.net>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Saturday, May 08, 1999 9:18 PM
Subject: Re: 3800 motor swap, computer trouble


>At 09:25 PM 5/8/99 -0400, you wrote:
>>
>> Hey all.. I just finished up a 3800 series II supercharged motor swap..
>> putting that motor in a 1988 buick lesabre T-type that had a 3800 series
I
>> code C motor. I have gotten two codes that are confusing me.. the first
is a
>> "est circuit fail" ... the new 97 ignition coil has been used with the
old
>> computer... and yes, I"m using the old computer at the time... the other
code
>> that is on there is "quad driver failure" code. I don't know if that is
>> related to the egr codes which I also have... but am not concerned about
>> right now...
>> does anyone have any detailed info on those two codes, why they would
show
>> up, or what the common problems related to them are?
>>
>> BTW.. I have checked the knocksensor wires to ground and get a resistance
of
>> 3.9ish kilo-ohms... so I know that there isn't a short to ground there..
and
>> I took the two knock sensors on the new 97 motor... and tied them
together...
>> Any help is much appreciated , and thanks in advance all! just trying to
get
>> as much input as I can so I can drive the car.
>>
>
>
>
>Kevin,
>Tying the 2 knock sensors together may be the culprit... The PCM is looking
for
>a specific load and now it's doubled.
>
>===========================================================
>           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
>     Packet: N5XMT at KQ4LO.#INT.NC.USA.NA   T.A.P.R. Member #7068
>   Sponges grow in the ocean... Wonder how deep it would be if they
didn't?!
>===========================================================
>
There shouldn't be anything "quad-driver" related to any knock circuits. I'd
be looking at something
the PCM is turning on and off--and monitoring to note if the circuit is
open. A bad TCC solenoid (open) will set
quad-driver codes for example. He's going to have to look back through
schematics and check for incompatible circuits--or existing problems with
the stuff he's got.

LWester at compuserve.com