Voltage based MAF device

[Bruce Plecan]

> Before I go about reinventing the wheel, I thought I'd ask here (probably
> should ask on the DIY list, but I'm not on there... ;) )

I'd really make sure there weren't any mechanical problems contributing to
the problem,  ie on some cars just the dip stick being out can cause that
error.  Be absolutely sure there are any vacumm leaks, and try restricting
the PCV line.  Maybe a little extra timing at idle.  Maybe a restriction in
the vac booster line.
A bunch of .01%s can add up.
Bruce
>
> Anyone got a quick and dirty circuit for a voltage based MAF calibrator?
> Here's my friend's problem.
>
> He's got a voltage based MAF that came off of a larger engined car, and it
> works fine on his truck except at idle, when he gets a trouble code of MAF
> reading too low (probably not pulling enough air through the MAF). Seems
> like he needs a minimum voltage level to be supplied to the ECU in order
not
> to trip this code. His range is 0 to 5 volts, but I'm not sure of the
> minimum level needed to not set the DTC.
>
> I've got several ideas running through my brain, visions of diodes or
> op-amps, but thought I'd ask and see if anyone had a quick and dirty fix
for
> this available?
>
> Thanks,
>
> Andrew
>
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