can u say pauls turbo 2.0
10-23-2007, 06:31 PM
#827
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I see it. You got that weird injector pulse width followed by a huge spike at 5200 rpm. I've seen this on Dan's car and WSFrazier's car and have no explanation for it as MAF and VE are both smooth at that point.
Gimme a sec with paint and I'll highlight it.
This:
Gimme a sec with paint and I'll highlight it.
This:
10-23-2007, 06:33 PM
#828
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it's hard to help someone out who is 2k miles away
damnit!
i saw that!
damnit!
i saw that!
Last edited by Area47; 10-23-2007 at 06:33 PM. Reason: Automerged Doublepost
10-23-2007, 06:35 PM
#829
yeah, my car isn't really completely tuned yet, I have no time to work on my own car anymore lol. I'll be going over it tonight though that I finally have a night off from the local cobalts..
As for my AFR ... well that's a different story, need to work on the maf output up top because it'll hold 10.70 (was at 11.8 comm 11.8 actual) then out of no where spike up to 13's (no knock though thankfully) I'll see what I can do on it tonight and hopefully post up some more logs with the maf adjusted better.
cool thanks
yeah that spike, I can't figure that out for the life of me, the car has done that since day one, and I've tried adjusting everything to do with fuel to no avail.... probably some weird ass table we still can't edit yet with hp tuners
As for my AFR ... well that's a different story, need to work on the maf output up top because it'll hold 10.70 (was at 11.8 comm 11.8 actual) then out of no where spike up to 13's (no knock though thankfully) I'll see what I can do on it tonight and hopefully post up some more logs with the maf adjusted better.
yeah that spike, I can't figure that out for the life of me, the car has done that since day one, and I've tried adjusting everything to do with fuel to no avail.... probably some weird ass table we still can't edit yet with hp tuners
Last edited by 06blackg85ss; 10-23-2007 at 06:35 PM. Reason: Automerged Doublepost
10-23-2007, 06:37 PM
#830
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is it something to do with the fuel tables themselves? have you changed the fuel filter recently? may sound stupid i know, but im trying to come up with idea's to help out
yeah that spike, I can't figure that out for the life of me, the car has done that since day one, and I've tried adjusting everything to do with fuel to no avail.... probably some weird ass table we still can't edit yet with hp tuners[/QUOTE]
beat me to it!
i have something that may help.
yeah that spike, I can't figure that out for the life of me, the car has done that since day one, and I've tried adjusting everything to do with fuel to no avail.... probably some weird ass table we still can't edit yet with hp tuners[/QUOTE]
beat me to it!
i have something that may help.
Last edited by Area47; 10-23-2007 at 06:37 PM. Reason: Automerged Doublepost
10-23-2007, 06:38 PM
#831
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Theres a possiblity that the injector offset table is incorrect but the weird thing is, at least on the local cars, it seems to be proportional to rpm and not map or maf.
10-23-2007, 06:40 PM
#832
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Dan's car did it and WSFrazier car still does it and we can't figure out what causes it. On Dan's car it felt like a horrible surge and then it would be fine again.
Theres a possiblity that the injector offset table is incorrect but the weird thing is, at least on the local cars, it seems to be proportional to rpm and not map or maf.
Theres a possiblity that the injector offset table is incorrect but the weird thing is, at least on the local cars, it seems to be proportional to rpm and not map or maf.
10-23-2007, 06:41 PM
#833
yeah I know it's always in the same area... most time's though when s/c'd it'll hit at 5800... but my afr doesn't plunge like it used to though at the point, it actually leans out.. but I think I just found my issue of the lean thing... I loaded in the wrong maf output table lol. oops.
but still can't figure out the ve drop off up top, as I said it did when I was sc'd but not nearly as bad
but still can't figure out the ve drop off up top, as I said it did when I was sc'd but not nearly as bad
10-23-2007, 06:43 PM
#834
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Edit: I see what you're talking about there. Your actual MAP pressure isn't dropping, only the calculated airflow from MAP (VE tune). If you get bored, take a screenshot of your VE table and maybe we can see why from there. It looks like you're transitioning into a cell that is calibrated for less airflow at a higher pressure.
10-23-2007, 06:47 PM
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10-23-2007, 06:59 PM
#839
so how out of wack does my ve table look... As I said really haven't had a chance to mess with it... anything in the upper area I should play with, cause I thought that table really wasn't used unless maf failure.
any way just re-did my whole maf scaling... and was going to install the new TB today, but I save that til I get the car running right first
any way just re-did my whole maf scaling... and was going to install the new TB today, but I save that til I get the car running right first
10-23-2007, 07:18 PM
#840
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so how out of wack does my ve table look... As I said really haven't had a chance to mess with it... anything in the upper area I should play with, cause I thought that table really wasn't used unless maf failure.
any way just re-did my whole maf scaling... and was going to install the new TB today, but I save that til I get the car running right first
any way just re-did my whole maf scaling... and was going to install the new TB today, but I save that til I get the car running right first
I think the biggest drivability problem is that goofy commanded pulse width at 5000 rpm and the rich spike following it. It could be an OS problem, which has me wanting to force the OS on my car, if its difference, onto Wes' to see if it fixes it.
10-23-2007, 07:53 PM
#841
hmm that could be it.... I have an old version of it,,, just went and did some new logs with the maf retuned.....
idle if f'd up now, afr jumps all over the place, but driveability is better. But now my afr is in the 10's then spikes to 12.xx up top.... getting a litttle better though... screen shots will be up in a minute
idle if f'd up now, afr jumps all over the place, but driveability is better. But now my afr is in the 10's then spikes to 12.xx up top.... getting a litttle better though... screen shots will be up in a minute
Last edited by 06blackg85ss; 10-23-2007 at 07:53 PM. Reason: Automerged Doublepost
10-23-2007, 07:58 PM
#842
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Can you feel when this is happening? I have the fkt injector pulse circled as well as the airflow calculation on both the MAF and VE to show its not in the airflow calcs doing it.
10-23-2007, 08:02 PM
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Everything else should just be in the MAF calibration unless there is a physical problem somewhere (boost leak, boost creep, etc.) except for that issue above. Completely unexplainable for now.
10-23-2007, 08:16 PM
#845
that's what I've been boggled by. I do think there is a boost leak somewhere though, testing it friday night (yeah I know driving for 3 weeks and never did a boost leak test since I installed the turbo lol). I have a few ideas of where and what might be leaking, but I can't think of anything after the maf, unless the tb gasket I made blew out again. that could explain the shitty idle too
well if any of the other guys familiar with the tuning process for a turbo cobalt have any ideas please chime in. I'll also send the tune to certain people if they really need to look at it
well if any of the other guys familiar with the tuning process for a turbo cobalt have any ideas please chime in. I'll also send the tune to certain people if they really need to look at it
Last edited by 06blackg85ss; 10-23-2007 at 08:16 PM. Reason: Automerged Doublepost
