MPI Tunner Issue

[acidbug]

ok so how do you fine tune the map if you have to wait days after making every changes ?

I'm getting it soon so im trying to get as many info as possible to not screw anything up =)

I fine tune whenever i want..that's the thing about it for me. I am pushing 10psi and holding in the 11's a/f wise. Sometimes i tune..and others i leave it..

I only tune when getting ready for the track and s***.

It took time for me to learn the setup..but i asked questions..and already knew how to program software from programming class.

the basics to get this thing working properly for your car..is simple.
Install it properly & Use My Maps as a starting point.

Everyone i have given my maps to..have had very good luck tuning their software. Why..b/c i have tuned my maps to only control stock injectors when hitting/in boost.

 

[Metal MP5]

yea i saw your map on Focus' MPI. we always load yours when ours is too screwed up to be fixed hehehe

 

[acidbug]

yea i saw your map on Focus' MPI. we always load yours when ours is too screwed up to be fixed hehehe

(laugh) (lol) (rockon)

 

[changedman]

chas makes great maps.

 

[acidbug]

chas makes great maps.

(2thumbs)

 

[Metal MP5]

but what if, for exemple, we find that an area on the map doesn't work well with our car and decide to change the fuel or ignition settings for that part of the map, do we have to wait a certain amount of time before we can see the results like some people have been saying ?

that's what i wanted to know when i asked about fine tuning. Because making small changes in the fuel map would be hard if you have to wait a day before seeing a difference ?

don't shoot me, please excuse my ignorance =)

 

[smp3000]

Yes- I owe a lot to Chas.... His maps ROOOOOOOOOOOOCCCCCCCCCKKKKKKKKKKK!!!!!!!!!!!!!!

 

[70]

but what if, for exemple, we find that an area on the map doesn't work well with our car and decide to change the fuel or ignition settings for that part of the map, do we have to wait a certain amount of time before we can see the results like some people have been saying ?

that's what i wanted to know when i asked about fine tuning. Because making small changes in the fuel map would be hard if you have to wait a day before seeing a difference ?

don't shoot me, please excuse my ignorance =)

If I understand correctly, you will see an immediate change when changing boxes in the software.

However, over a couple day time period, those changes will be "modified" by the stock ECU. Then you will make slight changes in the software again to compensate for the changes in the ECU.

 

[Metal MP5]

ahhhh k, starting to make sense now

thanks

 

[70]

According to everyone here, it looks like you'll reach a stopping point where the ECU will stop making corrections.

How long that takes I'm not sure...

 

[Bigg Tim]

but what if, for exemple, we find that an area on the map doesn't work well with our car and decide to change the fuel or ignition settings for that part of the map, do we have to wait a certain amount of time before we can see the results like some people have been saying ?

that's what i wanted to know when i asked about fine tuning. Because making small changes in the fuel map would be hard if you have to wait a day before seeing a difference ?

don't shoot me, please excuse my ignorance =)

When you get to the fine tuning phase, it will be immediate and no waiting for learning because it won't be learning. After you have a map loaded in the unit, the ECU will learn that map and you may have to change it a bit but not much. Once you do that, then you are done and it's down to fine tuning. If you tune it everyday, then you are tuning too much. Get it down and leave it alone and check it later, don't try too hard.

Make the map a little rich at first so the ECU will "get used to it" then once that's done lean it out a bit to get it right. It all sounds like it's a lot and it takes long but it really doesn't. I would say a day or two depending on how much you drive. If you only drive a little bit during the tuning, then it may take longer. The ECU goes through "cycles" and if you don't let it do it's thing, then it will take longer.

 

[Metal MP5]

thanks for all that info. i think ill be fine. its seems easier than i thought =)

 

[smp3000]

Here's my latest issue,

I just got a new clutch and LSD installed and they also made my exhaust a true 3 inch.. WEll they had to disconnect the battery to do so (of course) and in the process resetting the ECU...

Well now I'm stalling again anytime I go into neutral or drop below 1K!!!!! So I adjust my idel screw a bit and still no help.. It's as if the idle just jumps around while in park. The A/fs jum from the 13's to the 16's.

Then it will die at stop or even while driving when I go into idle.... This is very frustrating.I'm changing out the plugs tomorrow but WTF????

Is it the ECU just needing to re-learn the MPI?

 

[igdrasil]

No Relearning!

Ok...You *may* have to retune this thing if the following occurs.

1. ECU reset
2. Triggered CEL (example: bank X too rich)
3. If you mod the car with new exhaust, intercooler, turbine, piping, or anything else related...just like smp3000
4. If you kill your plugs, like me, while tunning...I had to change plugs every 2 weeks because I was tunning on the rich edge and lots of missfires and rich idles and the BOV issue.

Well now I'm stalling again anytime I go into neutral or drop below 1K!!!!! So I adjust my idel screw a bit and still no help.. It's as if the idle just jumps around while in park. The A/fs jum from the 13's to the 16's.

That happens to me too...and I believe this is worst on our setups with big exhaust...a bit less backpressure. A work around now for me is adding 8 degrees @ 500rpms (where it drops)...and pull some fuel out. This is a plug killer man...

 

[MPNick]

Here's my latest issue,

I just got a new clutch and LSD installed and they also made my exhaust a true 3 inch.. WEll they had to disconnect the battery to do so (of course) and in the process resetting the ECU...

Well now I'm stalling again anytime I go into neutral or drop below 1K!!!!! So I adjust my idel screw a bit and still no help.. It's as if the idle just jumps around while in park. The A/fs jum from the 13's to the 16's.

Then it will die at stop or even while driving when I go into idle.... This is very frustrating.I'm changing out the plugs tomorrow but WTF????

Is it the ECU just needing to re-learn the MPI?

You just had work done on your car. Check to see that maybe a hose is off or maybe a clamp is not on all of the way.

 

[smp3000]

hmmm... I checked my intake and all vacuum lines and everything seems fine. I'll check the charger pipes but I don't think that's the cause. The vacuum on my boost gauge looks just fine and it's not driving bad at all once at RPM above 1K...

I'll try adding some timing at 500rpms and see what happens.

 

[igdrasil]

Yeah...I have a crap "below 1500 rpm" drive. But its not an MPI issue. I have had it before with the FMU.

What I believe, in my case is the FM clamp...that when i go into 0 vac in that very low rpm (applying load) it will be triggered, thus clamping the O2 and messing with the stock fuel map.

I will recalibrate the FM clamp...because now I have it going IN just before going into 0vac.

 

[Bigg Tim]

I have a 3" exhaust and I have not seen any of these issues, so I don't know if that's an issue.

SMP-you can have a vacuum leak that the boost gauge won't "see". It doesn't take much to create a leak. Get some carb cleaner and start spraying to test for leaks. You may have to retune a bit, the ECU will learn a little in the beginning but will ease off as miles are put on.