May have been wrong all along

[rrauscher at nni.com]

Thanks for the tip. The '747 actually has this as an
option. I've only seen it used on BBC's (the option
bit set). I'll give it a try, well. . . once the
weather gets better!

BobR.

>Bob:  On the 89 6E code for the 165 ecm, learning is turned
>off during decel which prevents the bucking problem.
>You might turn off learn when in lean decel to cure the problem.
>Mark
>----- Original Message -----
>From: <rrauscher at nni.com>
>To: <gmecm at diy-efi.org>
>Sent: Thursday, March 15, 2001 6:55 AM
>Subject: Re: May have been wrong all along
>
>
>>
>> The common belief has been that larger injectors won't idle.
>> Evidence has been proving otherwise.
>>
>> And I believe that others have reported the same thing. Going
>> to 30's in a TPI setup with no idle or low speed problems
>> (with corrected cal). Then there is the Quad4 running I think
>> 33's? in a port PnH configuration.
>>
>> They idle fine. And need that much fuel for the high rpm
>> usage. (very little on-time available).
>>
>> Going to a larger injector will also change when the ecm
>> switches between sync & async injection. I have a real dodo
>> area in the current setup I'm using. During low speed light
>> decel, the car would start to buck to & fro.
>>
>> Took a long time to track it down to the switching from sync
>> inj to async inj. When in async it would lean out causing the
>> car to decel faster. Then the INT rises causing the ecm to
>> switch back into sync mode. This going richer would cause the
>> engine to pick up power again. And the cycle repeats.
>>
>> First thing I did was to verify the sync-to-async math in
>> the ecm. It's correct. Haven't fixed the transition yet. Will
>> work on it this summer.
>>
>> BobR.
>>
>> p.s. I do hope that Sleepy and Bashful make amends. 747's
>> aren't designed for dog-fighting.
<snip>
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