Re: Cold 350 TBI

[Shannen Durphey <shannen@grolen.com>]

Hmmm...  This calibration is s/s because of customer complaints that
there is knocking at at startup.  The new prom has reduced ignition
timing at idle when cold.  Have you looked at k/s readings?
Shannen

Guenther,Max [ASCO/PA] wrote:
> 
> I've got a 350 Chevy TBI that seems hard to start sometimes, and will cough
> and sputter upon acceleration, like the accel pump isn't working(even
> stalled once) for about a minute or two after you start it cold.  After that
> it runs great at WOT, idle and every where in between, just like new!
>         About 113,000 on  the truck(93 blazer full size)
>         1618625 ECM with BDJY
>         New fuel pump relay, coil, O2, Plugs, cap, rotor, etc
>         Put Injector cleaner through--seemed to help-
>         spray pattern looks good.
> 
> When its cold(winter) it would sometimes have a hunting idle(600-1300) but
> only for a minute after initial start.
> There are no codes soft or hard.  Coolant temp is ok (No immediate closed
> loop)and the rest of the sensor values seem ok, except the IAT which I don't
> believe it has.   I used the TTS software.
> 
> Any ideas would be appreciated.
> Thanks,
> Max
> 
> PS Has anybody on the list hacked the code for this yet?
> 
> 
> 
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