Piggyback installed

[LinuxRacr]

I have the J&S Safeguard that I have tested with the 5v output to the throttle. If you put 5v to the throttle position sensor, you get kicked out of closed loop, and open loop occurs. Here is a quote from my research:

Originally posted by LinuxRacr (02-19-2003)
I did some more drive testing after hooking up the TPS wire to the TPS (Throttle position sensor) wire on the ECU. I had my PDA Dyno hooked up monitoring the Absolute Throttle Postion. When I would hit 0 PSI, I would read really rich, and my Absolute Throttle Position would read 100% (even under partial throttle)! I mean my A/F Ratio gauge read all the way rich. Interesting.

 

[MPNick]

MPNick, How exactly are you getting your tuner to force the ECU into open loop upon boost? Being that all three protege's kick into open loop at different times/loads...and that each of the three do it inconsistently with other protege ECU's...

We use boost load for the trigger point. If you get into boost load we then switch over. I do not use the TPS for this. You can get two boost readings at the same TPS voltage. If you are going down hill the boost would be lower at the same TPS voltage. If you are going up hill the boost would be higher. This is why we use boost load for the trigger point of switching over.

I does not matter what Protege you have. Boost load is boost load. When the MPI unit reads boost load it makes the change.

Thanks again


Later...........Nick

 

[LinuxRacr]

Interesting. I wonder what signal gets modified to kick the ECU into open loop?

 

[Kooldino]

I am now a legacy!!!!

ph33r

It was both Nick Mannarino and Nick Karanackis who agreed and said that my stock rod bolts gave out. They have both seen the pieces and the engine. Honestly, I don't know what happenned. I do know that when the engine blew the first thing I thought of was "I've got 5 years left of payments - and now it needs an engine".

But hell - if everyone keeps calling it the "Micah Map" - I think I'll feel better about it.

Right...but your rod bolts may have given out due to lack of fuel.

 

[Kooldino]

I agree again. I would like to know more about this product, and how it deals with all of these issues before dishing out over 1000$.

I think nick's unit is ~$500. He just had a group buy on it...dunno if that's still going on or not.

 

[Kooldino]

Got a quick qestion w/ the MPI Tuner...Has anyone had any issues..w/ the Engine temp? As in..When you hit boost...Does the engine temp shoot to hot? Than when you release the gas and stay out of boost she goes back to normal operating?

Chas

Nope, because my temp sensor gauge isn't phukked with. Yours is.

 

[Kooldino]

I do not think the Chaz will have the same problem. For one he is tuning with the stock MAF. Second he has our new MPI/Modual Tuner. It will kick the PCM into open loop type mode when you hit boost. Any small fuel change in closed loop will not be picked up by the PCM and changed back. The newer set up does have an O2 clamp anyway. You would not need to use any other clamp.

That's awesome so long as it's well tuned.

 

[Kooldino]

Interesting. I wonder what signal gets modified to kick the ECU into open loop?

Re read the last two pages.

 

[DooMer_MP3]

We use boost load for the trigger point. If you get into boost load we then switch over. I do not use the TPS for this. You can get two boost readings at the same TPS voltage. If you are going down hill the boost would be lower at the same TPS voltage. If you are going up hill the boost would be higher. This is why we use boost load for the trigger point of switching over.

I does not matter what Protege you have. Boost load is boost load. When the MPI unit reads boost load it makes the change.

Thanks again


Later...........Nick

I think he was wondering how the MPI tuner forces the PCM into open loop though (ie, what signal do you modify to the PCM to trick it into open loop). But maybe thats a trade secret ...

So MPNick, there are now three iterations of the tuner? The one Kooldino has/had, the one jaje and paulmp3 have where they've been having to re-tune every so often, and now the one that puts the PCM into open loop when boost is detected? I'm glad I waited. Sounds like you've got something that does the trick now.

Chris

 

[MPNick]

I think he was wondering how the MPI tuner forces the PCM into open loop though (ie, what signal do you modify to the PCM to trick it into open loop). But maybe thats a trade secret ...

So MPNick, there are now three iterations of the tuner? The one Kooldino has/had, the one jaje and paulmp3 have where they've been having to re-tune every so often, and now the one that puts the PCM into open loop when boost is detected? I'm glad I waited. Sounds like you've got something that does the trick now.

Chris

As far as Kooldino, he does not have the MPI Tuner. It does how every control the extra injectors the same way as jaje and paulmp3. Still not sure why the two would be having problems other then just in the setup. Kooldino does use a MAP to control the onset of the extra injectors. With just the new wiring setup all three can control the extra injectors along with the stock injectors with the OEM MAF meter. I am very sure that this would solve any of the problems that they may have.

The new closed loop tuning came about for people who want to run lower boost levels and do not want to run the extra injector setup. Because it has test very well it has became part of the MPI/Modual Tuner.

Please let me know if you have any questions at all.


Thanks again


Later...........Nick

 

[Kooldino]

So MPNick, there are now three iterations of the tuner? The one Kooldino has/had, the one jaje and paulmp3 have where they've been having to re-tune every so often, and now the one that puts the PCM into open loop when boost is detected? I'm glad I waited. Sounds like you've got something that does the trick now.

AFAIK, there is the SMT-6 that I have, and the slightly updated "MPI Tuner". THere is no third iteration...it's the MPI Tuner with an external box to clamp things. You can add the box onto anything...even mine.

 

[Speedy]

So MPNick, there are now three iterations of the tuner? The one Kooldino has/had, the one jaje and paulmp3 have where they've been having to re-tune every so often, and now the one that puts the PCM into open loop when boost is detected? I'm glad I waited. Sounds like you've got something that does the trick now.

Chris
____________________________________________________
Does all the users installed the unit themselves or have MPNick install it?

 

[acidbug]

I had Nick install Mine..

Kooldino..Installed His..

PaulMP3 & Jae Jae..i belive had theirs installed by Andy Wagner!

Chas

 

[Bigg Tim]

I did mine myself. Nick helps a lot whenever I have questions about anything.

 

[Speedy]

Bigtim & acidbbg how are yours running? My appointment is for tomorrow with Nick.

 

[505zoom]

Let us all know how it goes. I need to see positive results from fellow mazdaspeeders before I try this thing out.

Nick, could you please send me a peek of the datalog from speedy's car like you mentioned in your PM??? Just wanted to remind you. Thanks

 

[mazdamp3_18]

Nick.... how would i kick my ecu into open loop if im not boosted??

i dont generate boost so how would i be able to tune withougt boost...

 

[acidbug]

Bigtim & acidbbg how are yours running? My appointment is for tomorrow with Nick.

My car is running well under boost..as well as no boost...


Chas

 

[Bigg Tim]

Originally posted by Speedy
Bigtim & acidbbg how are yours running? My appointment is for tomorrow with Nick.

Mine was running pretty good until the clutch didn't let me run anymore. Things have been on hold because of the holidays, but now all is well and once the clutch is in, I can tell some more.

 

[Installshield 2]

We use boost load for the trigger point. If you get into boost load we then switch over. I do not use the TPS for this. You can get two boost readings at the same TPS voltage. If you are going down hill the boost would be lower at the same TPS voltage. If you are going up hill the boost would be higher. This is why we use boost load for the trigger point of switching over.

I does not matter what Protege you have. Boost load is boost load. When the MPI unit reads boost load it makes the change.

Thanks again


Later...........Nick

Thank you for the reply ...doomer MP3 kind of mentioned though: I was asking about what the MPI tuner does to the ECU to change modes...Not what the tuner recognizes to authorize the switch...

I understand that load is load, but the programming of each of the 3 ECU's is different, which makes them change to open loop at different times and conditions...and each ECU does not do it the same each time...I was just wondering what sensors the tuner is intercepting, and what it is doing to make the mode switch...In stock form not just one sensor is creating the switch...The car will run in closed loop in most cases to almost 4,000 rpm at WOT before switching to open loop...and at WOT the TPS sensor is maxed out...So it has to take input from the MAF as well (You can also hit open loop while at partial throttle)...Are you manipulating both of these?...Or does only the MAF reading determine the switch?