...

 

Yours should look like this, -

 

You mean to tell me I've been chasing 5v for no reason? I'm pretty sure Troyer was the one that told me I was missing 5v reference at the MAF.


Thanks JBrew.

 

No problem. I guess I couldn't figure out what you needed.

What Mike probably meant is @ WOT you should have 5v(or 4.75v to be exact) on the MAF return/ground and it's not there. That shouldn't matter IMO, but I'm not a tuner either. Typically it goes from 0("idle")-4.75V("wot") on the return/ground. I believe that can only happen on a dyno tho, - the VSS info/data is used to calculate in relation to signal as far as I know. So unless you have the rear tires off the ground Trans in "D" and peg the throttle WFO, your not going to see certain output numbers go thru their ranges. I can't recall which ones won't read, dangit.

They say to keep in mind,- the MAF is only one part of a group of sensors that are used to calculate fuel tables/trims, or AF's. Although that is true, it's sort of misleading. - Since all it would take is one screwed sensor to thro things out of wack. On that vehicle, there isn't a whole lot of MAF DTC's that give you direction.

Anyway, -If you need more help with how to test that, let me know where you get stuck. Hopefully, I can pull you out

BTW- The typical MafSigVolts are 0.60 @ idle, 1.10 @ 20mph, 1.70 @ 40mph, 2.10 @ 70mph.

The MAF return ground should vary between 0-4.75v depending upon where your at with the above.

 

Cold start, 1.06v - 1.20v @ idle
Warm hovered more around 1.2v - 1.4v

Is that table for NA motors or does it apply to the sc models too?

 

Not sure what your referring to now? Where are you reading what?

 

This is what I was responding to