36lb Injectors Rich on Decel
03-08-2007, 05:02 PM
#21
Originally Posted by tici
I have an LS1Edit file... if you only need the IFR curve I can put it on a Excel sheet.
Email address?
Email address?
i just tried bumping my ifr table up to 45-49. did it just in case my fuel pressure was actually higher than 58.
i got a few kr's but much less than before except one of them hit above 9.9* but ltft was negative to +1.6 which looks good?
the car is running very rich all around and wot afr was in the 9's. my butt sensor says it felt good but the scan and sound of engine and exhaust wasn't right.
03-08-2007, 05:06 PM
#22
Originally Posted by SSpdDmon
With every injector setting back to stock (except the correct IFR for your injectors), did you try increasing the injector pulse width (offset) vs. voltage table by .25 miliseconds for 12+ volts (or something along those lines)? After reading what UKD wrote, this is where my 'gut' told me to try first.
is this aka injector flow rate modifier vs. battery voltage? if so, my table is 1.000 all the way across.
03-08-2007, 05:15 PM
#23
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Originally Posted by caliswangin916
where can i find this table? is this aka injector flow rate modifier vs. battery voltage? if so, my table is 1.000 all the way across.
is this aka injector flow rate modifier vs. battery voltage? if so, my table is 1.000 all the way across.
03-09-2007, 08:58 PM
#25
just pumped some 100 octane in last night and after 20 miles of driving(to clear the fuel line), i'm still getting a few episodes of kr. during miles 30-60, kr is still present so i'm thinking and hoping i have false knock because the patterns are similar with ltft up 4% during this "false kr".
my exhaust tone seems different with 100 octane and oil change since yeaterday. i want to believe that my exhaust tone had something to do with my kr in my logs prior to today. i might have a minor leak since the exhaust likes to beat on speed bumps.
something new now is that i noticed last week and today my MAP would dump from say a 70 MAP down to an 18 MAP immediately when i let off the gas. i can feel the car decel very fast. it's happened twice and has gone away after the next drive i make. is there something mechanical that i can check for this?
i'm still getting a rich decel and more so now with the 100 octane and hitting afr's in the 9's on 100 octane when it would only go into the 10's with 91 octane. wot is still good going at about 12.5 though so i'm gonna spray in a bit and see how that goes.
. i'll let be back to let everyone know if i break anything. 
my exhaust tone seems different with 100 octane and oil change since yeaterday. i want to believe that my exhaust tone had something to do with my kr in my logs prior to today. i might have a minor leak since the exhaust likes to beat on speed bumps.
something new now is that i noticed last week and today my MAP would dump from say a 70 MAP down to an 18 MAP immediately when i let off the gas. i can feel the car decel very fast. it's happened twice and has gone away after the next drive i make. is there something mechanical that i can check for this?
i'm still getting a rich decel and more so now with the 100 octane and hitting afr's in the 9's on 100 octane when it would only go into the 10's with 91 octane. wot is still good going at about 12.5 though so i'm gonna spray in a bit and see how that goes.
. i'll let be back to let everyone know if i break anything. 
03-10-2007, 12:07 AM
#31
went out and did a few nitrous runs for 2-3 seconds each and am running lean at around 13.2 afr. then a very rich decel going down into the 9's. FFFFFFFFFKKKKKKKKKKK!!!!!!!!! here is my tune. someone please send towards the right direction.
03-10-2007, 02:06 PM
#32
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I would guess yours is different if your car was originally running different injectors than mine (ie 99 w/ 26lbers vs 02 w/ 28lbers). In the post above, someone mentioned at 13.5v an .8ms offset time. I was suggesting that the table I posted be increased slightly to see if anything positive came out of it.
03-12-2007, 12:32 AM
#33
i tried adding .3 to that table from 13 volts and up and didn't see any good results lowering the rich decel.
i've ran a bunch of tunes and noticed in one scan that i was rich in decel but when i applied tps over 5% my afr would find its way back to 14.2-14.6 or so FROM THE 11's. if tps was 4-5% or less the afr was still rich in 11's-12's but once i got the tps 6% or over, it would get back to 14.6 in about 1 second.
i tried under transient fuel max tps that it was set at 5% so i lowered it to 0% but no resolving the rich decel.
can some of you guys post any size injector injector tunes that act like stock decel so i can compare them to mine. the tunes in the repository conflict with each other on direction to go.
thanks for everyones help so far, i'm going to try to keep on it.
i've ran a bunch of tunes and noticed in one scan that i was rich in decel but when i applied tps over 5% my afr would find its way back to 14.2-14.6 or so FROM THE 11's. if tps was 4-5% or less the afr was still rich in 11's-12's but once i got the tps 6% or over, it would get back to 14.6 in about 1 second.
i tried under transient fuel max tps that it was set at 5% so i lowered it to 0% but no resolving the rich decel.
can some of you guys post any size injector injector tunes that act like stock decel so i can compare them to mine. the tunes in the repository conflict with each other on direction to go.
thanks for everyones help so far, i'm going to try to keep on it.
03-12-2007, 02:49 PM
#35
i did try ve tuning it but didn't see anything good. i smoothed it out too. i might have done it wrong? i followed the ls1tuningdoc in the stickies.
what i am noticing is that when i decel before DFCO, my 02's are staying up at 850 to 950 mv. looks like my 02's as if i was at 100 TPS. is this normal?
they do stay up some other times but is consistently staying up on decel.
what i am noticing is that when i decel before DFCO, my 02's are staying up at 850 to 950 mv. looks like my 02's as if i was at 100 TPS. is this normal?
they do stay up some other times but is consistently staying up on decel.
03-12-2007, 02:58 PM
#36
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I'd reduce the VE cells you're in during decel to see if that helps. When logging, make sure DFCO is off and try to only look at fuel trim cells 0-19 (if in closed loop).
03-12-2007, 03:07 PM
#37
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Originally Posted by SSpdDmon
I'd reduce the VE cells you're in during decel to see if that helps. When logging, make sure DFCO is off and try to only look at fuel trim cells 0-19 (if in closed loop).
03-12-2007, 03:11 PM
#38
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Originally Posted by muncie21
During decel he should be in FTC 21 right?; which is a non-trimming cell.
03-14-2007, 11:04 PM
#39
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Question on the Spray AFR going up w/ the larger injectors...
Since your in messing with the tune, could you have disabled the MAF (Doing a VE tune or a SD type tune?), and the reason its leaner is the MAF is disabled due to something you were in the middle of trying to tune/log?
Since your in messing with the tune, could you have disabled the MAF (Doing a VE tune or a SD type tune?), and the reason its leaner is the MAF is disabled due to something you were in the middle of trying to tune/log?
03-14-2007, 11:16 PM
#40
Originally Posted by Beer99C5
Question on the Spray AFR going up w/ the larger injectors...
Since your in messing with the tune, could you have disabled the MAF (Doing a VE tune or a SD type tune?), and the reason its leaner is the MAF is disabled due to something you were in the middle of trying to tune/log?
Since your in messing with the tune, could you have disabled the MAF (Doing a VE tune or a SD type tune?), and the reason its leaner is the MAF is disabled due to something you were in the middle of trying to tune/log?