TUning Issues for megasquirt.

[fiftytakedowns]

Hey, I have been trying to tune my 2002 for the past couple of months, and I pretty much Suck at it. I dont know what is going on, and Ive tried everything from hundreds of Maps and SPark maps etc etc. I'm getting tired of pulling everything apart only to find nothing really wrong, but I can't get it to run right.

But for some Reason During Low RPMs the car sputters around, almost sounding like a WRX. Then as the Upper RPMS kick the car begins to really start to run smooth. Except when I begin to punch it it will get occasional misfires.

It maaay help

the sound is pretty washed out

http://s7.photobucket.com/albums/y272/peaceville/?action=view¤t=Movie14.mp4

http://www.msextra.com/forums/viewtopic.php?f=4&t=43044

[flyingjolly]

do you have a widebandlambda?

[jimk]

Hey, I have been trying to tune my 2002 for the past couple of months, and I pretty much Suck at it. I dont know what is going on, and Ive tried everything from hundreds of Maps and SPark maps etc etc. I'm getting tired of pulling everything apart only to find nothing really wrong, but I can't get it to run right.

But for some Reason During Low RPMs the car sputters around, almost sounding like a WRX. Then as the Upper RPMS kick the car begins to really start to run smooth. Except when I begin to punch it it will get occasional misfires.

From your description, it is running lean across the board, both light and heavy load. Richen it up a by 10% to see if it runs better. I'd guess your actual AFR now is around 17. However as was said by the post above, a wideband O2 readout and closed loop setup is what you need to make it right.

I first put EFI on in 2004 and have five different ECUs (going on 6) for the same car, always adding on features.

[spets]

If you don't have a wideband, get one.

[fiftytakedowns]

I do have wideband, sometimes Id have it running as rich as 10:1 and and I wouldaim for about 12.5:1 cause anywhere higher it would just be worse.

I tried dilly dallying around with lots of AFR's.

Whats your recommended AFr Targets?

[fiftytakedowns]

It maaay help

the sound is pretty washed out

http://s7.photobucket.com/albums/y272/peaceville/?action=view¤t=Movie14.mp4

The Tunes:

http://www.msextra.com/forums/viewtopic.php?f=4&t=43044

[PatAllen]

does your wideband unit is calibrated ?

i am not that much familiar with the MS, but do you take the readout of the afr from the wide band unit directly, or is passes thru the MS then you get the readout on the lap top?

if it where me i would check the type of afr signal the MS expect. Maybe it is looking for a narrow band unit, which doesnt have the same voltage output/curve as most of the wide band units have...just a thought. that would mess up all you adjustements if its the case. worth a check.

[Dave_Ganzer]

DATALOG!!!!!

We can't help without a DATALOG!

Dave Ganzer

[fiftytakedowns]

http://www.msextra.com/forums/viewtopic.php?f=4&t=43044

[Colin]

How are your grounds?

[fiftytakedowns]

http://dl.dropbox.com/u/11819570/TUNES%20and%20DATALOGS/wtf1.msl

http://dl.dropbox.com/u/11819570/TUNES%20and%20DATALOGS/newtune.msl

http://dl.dropbox.com/u/11819570/TUNES%20and%20DATALOGS/newtune1.msq

http://dl.dropbox.com/u/11819570/TUNES%20and%20DATALOGS/wtff.msl

http://dl.dropbox.com/u/11819570/TUNES%20and%20DATALOGS/NEWYEARS%28police%20charlie%20AFR%29.msq

here are a couple random tunes and datalogs

[fiftytakedowns]

all grounded to the same place. definitley.

[Dave_Ganzer]

try calibrating you tps....it's at 100 most of the time...it should be Zero!

The low throttle PWs are very low.... Too big injectors........

DaveG

[Dave_Ganzer]

42# injectors!!!!!!! you must be kidding.....bigger is not always better.....you'll never get good fuel control with those injectors at low throttle.....If you think you need that much fuel you should stage a second set of injectors at high power.

and FWIW..... we have had very poor luck with MSNS ....never got it to run nearly as well as MS2 v2.89.......

DaveG

[TobyB]

and I'm megasquirtstupid (so far... we'll see how the land cruiser project goes)

but at 10:1, you'll bog horribly too. It just goes 'soft'.

But yeah, if you really are running 42 lb injectors, that ain't gonna work....

t