---===The Official MAFT-Pro Thread===---

[EastWingedBeast]

Originally Posted by TurboBob

At the moment, the Pro can count knock events on a Porsche and a GN. The Mitsu knock system is internal to the ECU, and as such is difficult to monitor.

The Pro can monitor timing, which is very effective for tuning.

To log actual knock counts requires communicating with the ECU, which I may try to do with the Pro, although getting knock information from the Scanmaster is a better way to go.

So, to answer your question, direct knock monitoring is a long term goal, but in the short term, the timing monitor works right now.

Bob

Ahhh ha!

Tell me more about the timing monitor?
If the ECU retards timing, we assume knock?

If I were to make a black box which turned the raw knock sensor output into a digital pulse train, would that help?

Paul.

[TurboBob]

Originally Posted by EastWingedBeast

Ahhh ha!

Tell me more about the timing monitor?
If the ECU retards timing, we assume knock?

If I were to make a black box which turned the raw knock sensor output into a digital pulse train, would that help?

Paul.

Yes, not only is there knock retard, but there is octane learning happening in the ECU, (this is assumed, since nobody has the mitsu 3S software, but the DSMs do it...) So you can monitor this activity.

A black box to do this would be cool, then we could count knock events like the on the Porsche installation.

Bob

[jwetzler]

Originally Posted by DriveFast99

Hey bob do u think having my IAT sensor in my plenum is causing me issues? Basicly the car runs like crap and breks up and the tune moves around a bunch at anything above 12psi. On occasion i get a clean pull on 15psi but typically not. 12 psi feels much better but still a little rocky. I was doing reading and i read the best place for it is pre turbo since im still using the stock ecu.

So basicly im asking you if you think by me moving my IAT to the intake it would greatly help me?

I would put the IAT sensor in the Y-Pipe.

I wouldn't put the IAT in pre-turbo because the intake are is going to be cooler than the actual charge air. The air is compressed which heats it, then goes to the intercooler to be cooled, then into the engine, lot of temp changes. I would go for the Y pipe since you get the actual temp right before it enters the throttle body.

[3000vr4tt]

ok bob so far i got all my check engine lights off..now at idle im gettin some backfire popping..and my wideband is still not reading anything..a lil problem also is when i tapped the gas a lil bit the car like sputtered and died

[Rogue_Ant]

Originally Posted by TurboBob

A black box to do this would be cool, then we could count knock events like the on the Porsche installation.

You could call it a KLR


Rogue

[3000vr4tt]

im going to mess around with the tps enrichment. i took the car for a ride its still running a little rich, but i think between shifts its running lean. im not really sure at idle its rich i pulled the plugs out and they were whiteish so i dont know where its running lean. plus the white band isnt reading right at idle im assuming cuz the cars down pipe is straight open.

[3000vr4tt]

ok so i tried tuning the car at idle. it runs very lean but no knock. i have 550s and i set the mainscale to -35. i got down to about -17 and at idle it was down to 13.5 fluctuating up to 14.2 and up to 15.5 when i started driving and come to a stop wide band would show running lean and stay up there. and soemtimes will drop rich or go back lean. anyone help me

[EastWingedBeast]

Originally Posted by TurboBob

Yes, not only is there knock retard, but there is octane learning happening in the ECU, (this is assumed, since nobody has the mitsu 3S software, but the DSMs do it...) So you can monitor this activity.

A black box to do this would be cool, then we could count knock events like the on the Porsche installation.

Bob

Hi Bob,

I had another thought at the weekend.
If the signal conditioning is done within the Mitsi ECU microcontroller, this wont work, but:
Couldnt we tack onto the pin/track within the ECU, for the knock sensor, after all of the signal conditioning? The ECU may just have an external IRQ line pulled up/down by the knock sensor? This would give us a digital signal source?

Paul.

[TurboBob]

Originally Posted by EastWingedBeast

Hi Bob,

I had another thought at the weekend.
If the signal conditioning is done within the Mitsi ECU microcontroller, this wont work, but:
Couldnt we tack onto the pin/track within the ECU, for the knock sensor, after all of the signal conditioning? The ECU may just have an external IRQ line pulled up/down by the knock sensor? This would give us a digital signal source?

Paul.

My understanding is that it is filtered and fed into an ADC, which is read by the ECU. As far as I am aware there is no discrete knock event signal in the ECU. (let me know if you find one....) The knock module is one of those vertically mounded hybrid circuits in the ECU.

Bob

[msassoon]

I have a bit of a strange problem now. I have re-attached the supercharger, and now, PT Tracking does not seem to work for cruise or AFR Tracking for WOT. The cruise I have checked, and the TPS and RPM are in between the thresholds (TPS Max and RPM Max) and the wideband is connected with no O2 sensors, so this seems fine. Any ideas? Could a failing CAS cause this? I have replaced the TPS so far.