MPI tuning

[Jeph]

So I have my car back!!
It runs awesome, and the tune is pretty good, but its running really rich.
Here's my map from the car right now.
/members/Jeph/7psi.smt
Its pretty good until i hit abour 3500 RPMs, then it goes pig rich, and my wideband won't even register anything.
I'm afraid to do anything to the map because i don't want to screw something up, and it was hard to see where the cursor was when i was punching it. I was more focused on keeping the car on the road.
So if someone could tell me where i should cut back some fuel, that would be awesome.

 

[Bigg Tim]

So I have my car back!!
It runs awesome, and the tune is pretty good, but its running really rich.
Here's my map from the car right now.
/members/Jeph/7psi.smt
Its pretty good until i hit abour 3500 RPMs, then it goes pig rich, and my wideband won't even register anything.
I'm afraid to do anything to the map because i don't want to screw something up, and it was hard to see where the cursor was when i was punching it. I was more focused on keeping the car on the road.
So if someone could tell me where i should cut back some fuel, that would be awesome.

just save that map, then modify it where needed. Wher you are too rich is where the turbo module is coming on. Is it coming on while not in boost? If so. then raise the switch point in the global settings a little. Then you may need to lower the numbers in the area you are rich. So if you are rich in the middle column at around 3300 to 3500, then lower those 4's to maybe zero's or something. You need to know where the red cursor is when you are rich, before you change things. But the first thing is to make sure the switch isn't coming on when you're not in boost. You can tell if it's on by the A/F going pig rich.

 

[CasopoliS]

congrats on getting the car. I thought you would have gotten it tuned....

 

[Jeph]

It was tuned, but I'm 3000 feet above Phoenix, so there is less air up here. So the tune that Beau gave it will be rich for here.

 

[Jeph]

The turbo module isn't coming on while out of boost as far as i can tell. I've been driving mostly out of boost, and the wideband hasn't pegged rich once while out of boost. Its usually good until the boost gauge hits 5 pounds, and then it goes rich

 

[Spooled]

Is there a global map multiplier that you can adjust to compensate for altitude rather than messing with Beau's maps? Maybe a global MAF adjustment or fuel map overlay?

 

[Spooled]

Or actually probably a turbo module multiplier since it only happens in boost. I don't know the MPI tuner software, but I would assume there is something like that.

 

[Jeph]

I think there is a global multiplier, but it adjusts the whole map, not just while i'm in boost.

 

[Bigg Tim]

RIGHT! But if you find that you are running a little rich all over, then lower the fuel calibration a bit to lean everything out. Don't just go by the WBO2 while in closed loop. You need to make sure that on the SW, the AFR meter flucuates between 14 and 15, no more. If it moves higher or lower, adjust the fuel until it is in that range. If not, then it will throw a CEL after some time. Also, watch it during normal highway cruising, you want to make sure it only flucuates the same way. The reason you watch that is because that is what the ECU see's and if it is not seeing what it wants, then hello CEL!

 

[Jeph]

Where in the software does it show my AFR? I didn't remember seeing it anywhere when i was looking at the laptop last night.
Also noob question. When is the car in closed loop?

 

[Titanium-99]

subscribing!

 

[apocman]

you can seem the AFR results on the left part of the MPI SW the little bar guages with numbers beside them one of them is the AFR reading, BTW I have an AEM WB AFR and the MPI SW is dead on with my WB so it works great...

 

[apocman]

pm'ed you my mobile number

 

[Jeph]

Did any of you look at my map, and try and see where i should cut back fuel?

 

[apocman]

I'll go get my carputer out of my car and download it, then I'll take a look

Did any of you look at my map, and try and see where i should cut back fuel?

 

[Jeph]

Thanks man, I just got back from a little bit of driving, but its really hard to try and tune while driving.
How do i datalog it so i can tune after i am done driving?

 

[apocman]

call me I sent you my cell #. I'm at home today so call ASAP!!!!

 

[Bigg Tim]

Go to the tools menu and click the "start logging MPI_TUNER" and it will log everything you do. Then when you're done you click the "stop logging MPI_TUNER". Then click the playback feature up top when you are off line and load the file and watch it.

I told you in an earlier post where you could change the numbers to take some fuel out. It would be best to do a datalog and post it so we can see what's going on. Don't make it all long, a minute or so is the easiest to do at a time. Then explain what you were doing during that minute. Ohg yeah, the AFR IN bar on the left of the SW shows the A/F ratio. You can also look at the AFR input V bar to see the voltage. It should flucuate between .1 and .9v, maybe more like .2 to .7 or something like that but not only a tenth flucuation. It should flucuate more then a tenth.

 

[apocman]

Hi Bt, hope things are well with you...

I just got of the phone with him and explained how to data log. I told him to email me and post it so we can look at it.

 

[Bigg Tim]

Hi Bt, hope things are well with you...

I just got of the phone with him and explained how to data log. I told him to email me and post it so we can look at it.

Right on! Keep up the good work!(thumb)