TBI idle problem

[Bob Valentine]

Did you get any good replies off list?   I'm about to do something simular
to what you did.  If it helps I had a simular problem with my '730 setup.
Added a bit more to the fuel table at idle RPM's and it went away.    Took
the idle BLM's from 128 down to about 124-126.  

-> Bob Valentine
-> bob at tecmark.com 

At 11:37 PM 11/4/2000 -0500, you wrote:
>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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