PorKen

(In part deux), I deleted the full load input, which came after (part one), where I advanced the idle and part throttle by 3°. This works with stock chips. I put in performance chips which fixed the part throttle and full load, but the tweaks overadvance in combination. However, the idle advance is left alone w/chips (for NOx emission testing), so of course I had to fix that.

To advance only at idle, I disconnected the input from the TempII sensor, #23, then put a wire from the idle switch input, #4, through a 5.6K ohm resistor in place of the TempII input. At idle, the EZF sees 5.6K, and advances* 3°. Off idle, the circuit is open and it does not advance*.


(See part deux for more detail on the ECU connector.)

The extra 3° at idle makes the idle smoother, and should use less gas. It also should make it run cooler, but I haven't tested for that. The idle correction is much faster, and can be a bit too 'strong', so I ended up setting the base idle to 600rpm instead of the regular 680±40 to calm it down. The LH still maintains 680.

*Technically, the idle map is always 3° advanced. At operating temp, it is retarded by 3°.

John Speake

Neat experiment Ken. We are making good progress on the EZF version of the SharkTuner.

Then you will be able to program more easily :-)

PorKen

John,

I have compared my EZF board to others, and it is the same revision. (Unlike my LH, which wouldn't work with the ST without modification.)

Louie will definately be able to beta test the EZF ST on my '86.5, without issue.

John Speake

Louie's break out box will need to come to me for an upgrade for EZF.

Darien in ls Vegas also has an LH like yours. He and Bill just folded the xtal forward while the used the ST after cutting away the plastic support. No soldering needed.