MAF meters and open-loop.

[soren]

>> Have you saturated the meter?
>>
>
>Haven't been monitoring the output of the meter, but now that
>you mention it, that very well could be it.

Are you using the meter from your 2.6 NA or the one from the 4ZC1-T that the
turbo and stuff came off of (I am guessing here but pretty sure that's the
only turbo stuff that will fit easily on your 2.6)?  The mass air meter from
the 2.0L 4CZ1-T saturates around 10 psi of boost (on a 2 liter engine in an
Impulse).

>> Timing very retarded, due to WOT switch or knock sensor?

>No knock sensor so it can't be that.  Timing isn't retarded at all
>and I'm pretty sure that the WOT doesn't cause it to do so.  I will
>need to check the manual on that one to make sure.

    The 4CZ1-T has a knock sensor on the block but it is used only for boost
control, no timing effects as far as I know.  If you didn't use the TCS
solenoid and controller off the donor Impulse (still basing my reply on the
guess about the donor vehicle) the knock sensor shouldn't be an issue.  The
WOT switch does not retard spark in this application.

I just set up an additional injector to trigger under boost (right at the
pressure where it used to go lean) and WOT on my Impulse, it should allow
more boost without screwing with the MAF signal.

Soren
89 Isuzu Impulse Turbo