MAF limit reached @ 14psi

Little Beavis said:
Dana, you're still running a MAP aren't you?
Yes.

If you ran the MAF through the tuner, you could clamp the voltage (it does this for you), then you wouldn't freak your ECU and you could still tune the way you've always done.
Really? Even though I don't have the turbo module, but ONLY the little grey box? Are you certain?
 
Word. That's my fallback if doing this MAF madness doesn't guarantee to fix me w/o the turbo module. Waiting on a definite answer on that one.
 
Ok I'm confused, in the first post and such I was under the assumption that you were running a MAF sensor, then a few post up it changes to a MAP sensor? At any rate there are 2 viable answers here, depending on how much money you want to spend. You can either A. Get an SAFC type of device to take care of the karman count problem, or B. you can get a MAP or SD setup. I suggested this to someone else on another thread in here. You can get a LT-1 MAP sensor setup for about 150(Actually you could probably grab the setup out of a jeep or porsche also), the only problem you'll have is that the MAP setup is 12v, whereas you have a 5v system. However this problem can be taken care if with about 2 bucks worth of parts from Radio shack. Speed density will probably run about the same but is a little harder of a junkyard find. I'll have to check around, but I dont think they ever made a MAP sensor that ran on 5 volts...Back to cheap options I'm also a fan of the pressure switch idea. You'll send stock volts to the ecu until enough boost is reached to trigger the switch.
 
I have a MAP and a MAF. the MAP can read more boost than I'll ever see.

The MAF wiggs out at current power levels.
 
Kooldino said:
Yes.


Really? Even though I don't have the turbo module, but ONLY the little grey box? Are you certain?
Yes, certain. . .you would have something like this. Lower is about 1.5V and upper below 5V. That way the MPI will never put out a signal that is outside of that range.

fuel.jpg
 
So let me get this straight...Should I have this same lower fuel limit setup on my car. I have the turbo module. Nick? Jeremy? Bueller?
 
LinuxRacr said:
So let me get this straight...Should I have this same lower fuel limit setup on my car. I have the turbo module. Nick? Jeremy? Bueller?
It can't hurt to have that limit. Basically the car wouldn't run with anything lower than that so you might as well put it in (IMHO). Just like you can get a high MAF error you can get a low error (CEL) as well. I got one before (while tuning), and changed this setting and have not had one since.
 
Little Beavis said:
Hmmm. . .sex change?

Am I right? What did I win?
No, that's an ongoing project.

Ok, how the hell do I wire this resistor in?
 
You put it on one of the wires on the PB and then to a ground. I can't remeber which color wire though. I'll look through my instructions and see if I can find it.
 
Ok, so here's what I'm gathering here...


ECU wire #88:

MAF------------------ECU
.................|
............... [ ] <--resistor
.................|
.................|
.................- <--Ground (what ground do i use?)
 
PB=piggyback. Do you have pin 88 cut or is it still stock? If it's still stock, then I don't know. If you have it cut, then I think you put the resistor on the blue of the PB then to ground. You may want to ask nick again. I remeber him telling you at the dyno, but I forgot as well.
 
from Nick's install instructions:

"Install the MPI Tuner wire #18 violet to the PCM side #88 wire."

So you're saying put the resistor on wire #18 (violet) on the MPI, and then to ground. Also hook up wire #88 to wire #18 on the MPI?
 

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