I'm not sure what to change to lean my car out a little bit. Here is a log and my wb shows about 10.8 ish at wot
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07-11-2012
I'm not sure what to change to lean my car out a little bit. Here is a log and my wb shows about 10.8 ish at wot
07-11-2012
usually the map sensor.
07-11-2012
MAP?
Oh buddy............
Well first thing: do you have a canned tune?
07-11-2012
You should really try UVscan instead of the logging in DHP.
Show a screen shot of your: Calibration data>Fuel>PE>Base_PE_AF
That would be where the main changes would be made but before you do anything post a screen shot.
07-11-2012
Yeah two ways to go about this:
One: Change PE values in so that you see what you want on the WB.
Note: you may end up seeing some strange things like commanding 9:1 AFR or 13:1 AFR and getting 11.0 on the WB.
Two: Ensure fuel system is setup correctly. Then calibrate MAF so that commanded is the same as actual. Then pick a commanded AFR.
07-11-2012
I have a canned zzp tune I'm starting with
Originally Posted by Pure2sin
What do you mean by the fuel system being setup correctly? I appreciate the help guys I'm kinda lost right now lol
07-11-2012
I think you need to do some MAF tuning.
07-11-2012
No point in MAF tuning till you figure out the fuel.
From the factory, fuel pressure drops off in boost compared to what it should be. Hence the oddly sloped injector flow rate table.
If you get a fuel pump rewire, that should bring things back up to par. Then you'd run the values from 100 kPa vacuum in both IFR and offset vs pulsewidth vs MAP in all columns.
Or you could just tune around all of that via PE and MAF tables.
Whatever floats your boat.
07-11-2012
What do I do to the maf to tune it. I'm sure I sound like a retard but I'm not sure what to do exactly. I'd like to figure this tuner out a little before I do any other major changes to the car.
07-11-2012
Thanks matt i guess i have a lot of reading to do lol. Does anyone know where i can dl tinytuners?
07-11-2012
check the stickies in this section.
07-11-2012
Will do. Research here I come.
07-12-2012
So to do the open loop maf tuning i'd have to log my wb? I can't do that with dhp right?
07-12-2012
Yes you can. That is what that little green thing is on the side of the box is for. If you have one, but you should.
Green part on the bottom of the box shown in this pic.
07-12-2012
Which part of that do I hook it to and do I have to dl anything to make it work?
07-12-2012
Matt.. you are mistaken here.. that boob had no idea what he was talking about.From the factory, fuel pressure drops off in boost compared to what it should be. Hence the oddly sloped injector flow rate table.
Fuel pressure DOES NOT fall off from the factory... if it does then your fuel system went to ****.
You dont need it.Does anyone know where i can dl tinytuners?
After PE and IFR is adjusted....I think you need to do some MAF tuning.
10.8 is pretty solid for a 3.4 car.. but I would wiggle PE up and down to see if the KR gets worse or better... leaner is probably not going to be the direction you want to head.Here is a log and my wb shows about 10.8 ish at wot
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