TBI idle problem

[Programmer]

Wheres the coolant temp sensor mounted ? Does adding more timing
at the lower kpa vs RPM smoothen things out ? What's your FP
set at ??
Lyndon.
-----Original Message-----
From: Brent <WildKat at paonline.com>
To: gmecm at lists.diy-efi.org <gmecm at lists.diy-efi.org>
Date: November 4, 2000 9:33 PM
Subject: TBI idle problem


>Hey folks,
>
>   I would be most grateful for any input on the following problem.   I
>recently swapped a 747 (making the appropriate pin changes) into an 88 TBI
>T/A with 700R4.  The car started life with a 305 TBI and the 1228063 ECM.
A
>350 sbc was installed with irons heads 9:1 CR, edelbrock TBI cam,
Edelbrock
>TBI Performer intake and the 65lbs/hr injectors.  Ran rich at idle and
threw
>code 43's like mad.  The cam and head specs are pretty durn close to a 91
>full size Chevy truck 350.  Figured a truck bin should be close.
>
>I started with the ARJT code from a 91 2500 Chevy PU.   I adjusted the BPW
>lower to compensate for the 65er's vs the 55er's normally used.  Ended up
>with a BPW of 120.  Gave 126-128 INT and BLM cross the board during cruise.
>No knock counts.
>
>The problem I'm have is a surging idle and stalling some times.  The spark
>table is stock.  Same values from 30-50KPA and 400 -1400rpm.
>
>Unfortunately I'm far away from the car.  This is an attempt to help a
>friend.  Any ideas where I should start?  This bin is stock except the the
>BPW, TCC lock up, and EGR enable temp is raised to max (00).   The engines
>are fairly similar spec wise.  Am I chasing a hardware problem?
>
>Thanks for any incite.
>
>Regards,
>Brent
>
>
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