1227165 Tuning Advice

[David A. Cooley]

At 12:05 PM 4/23/99 -0700, you wrote:
>Thanks Dave,
>
>Assuming the FP change works to eliminate the WOT knock, what would I change
>to center the BLM for the closed loop condition??? There are many tables
>related to the fuel control!
>

Hi Bruce, Actually, what you can do is maybe leave the FP alone or use it
to center the cruise BLM closer to 128, then use the PE A/F % vs RPM to add
fuel at WOT...  The FP change can be used quickly to see if the knock goes
away without modifying the chip.

>If I run out of FP adjustment range at WOT, do I play with the "Open Loop
>A/F Pct. Chg. vs. LD Value" table or the or the "Power Enrichment A/F Pct.
>Change vs. RPM table" ??? My guess is the Open loop table. Is this correct??
>

nope, PE... Open loop is a misnomer for WOT... OL is used for initial
warmup... once it goes into closed loop, goinng to WOT is a form of open
loop but it's called PE.  The open loop A/F tables may have some effect on
it, but they will screw with the warm up fuel curve as well... PE tables
only affect the fuel at WOT (Actually a bit before WOT, as there is a table
or two that specify when PE is used... PE enable vs TPS & RPM)

>I looked for a WOT Spark Adder table and could not find one. Does one exist
>for the 1227165 ECM's??

You might see if there is spark advance/retard vs time in PE or similar...
anything PE will affect WOT.
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           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?!
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