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View Full Version : Newbe with Questions on autove and LTFT


Johno
August 2nd, 2009, 02:50 PM
Hi there everybody I am new to this forum and would like some opinions on these thoughts of mine.
I have been through the autove tutorial and auto maf and have come up with a fairly good tune, I went for a long drive and the car runs and idles good, so i thought.
Latter that day i went for a second drive and found the car stalling and hunting under 1200 rpm I loged the LTFT and found them to be very high between 4.0 and 8.0 .The next day it seemed to be ok again.

My thought is that the ltft's are causing the problem, there may be another factor i dont know about.
I was going to turn off the LTFT's but I have always believed the lftf's are there to trim the fuel to the optimum 14.63.
Is this a normal thing? or should i be tuning with LTFT's although most people in this forum go with AutoVE.

P.S. i have a GEN3 with 300kw cam equivalent and high flow exhaust
Johno
August 3rd, 2009, 02:04 PM
any body any thoughts
mr.prick
August 3rd, 2009, 02:32 PM
High LTFTs after AutoVE? :laugh:
You can tune with LTFTs and WBO2,
it's all in the filtering.
Johno
August 3rd, 2009, 03:08 PM
can you explain more about the filtering
mr.prick
August 3rd, 2009, 03:59 PM
In general or for LTFT?
waterbug1999
August 3rd, 2009, 04:08 PM
Its the same filtering you did in the AutoVE, just change some of the paramers. Right Mr P?
Johno
August 3rd, 2009, 04:54 PM
It looks like tuning with ltft's are the way to go as you are using the the feed back from the pcm to base your adjustments.
So why is autove a more popular way of tuning
Johno
August 3rd, 2009, 05:12 PM
It looks like tuning with ltft's are the way to go as you are using the the feed back from the pcm to base your adjustments.
So why is autove a more popular way of tuning
waterbug1999
August 3rd, 2009, 05:34 PM
Johno, I was doing what your doing a few weeks back.. I got confused and tried leaving the car in Open Loop Speed Density and the car pulls, responds way better then before.

So far I like the way everything is going, if you have a WB02, give it a shot.
Johno
August 3rd, 2009, 06:03 PM
I plan to keep ol on
I have now tuned with Autove then automaf turned on ltft and cl,
then tried tuning with LTFT's and the ve tables are quite different
i am trying to work out the better way to tune for every day road use