[Shotimes] Leaning out @ part throttle - opinions please

[Timothy Tyner]

First, where is my fender.

Thanks, but it is not a Tweecer or tune problem.  There is nothing to be 
learned from the datalogs, as they look picture perfect, MAF values all on,  
HEGO's good, KAMFR values from .972 being the lowest I have seen to 1.004 
being the highest, and that was when I had a bad HEGO, now they are very 
close to 1.  My WOT WB numbers are exactly what LAMBSE is commanding.  The 
last thing I ahve to look at is my fuel pressure.  I have checked it at 
idle, or revving it in nuetral, but I do not have a mounted gauge, so for 
all I know it is going crazy at part throttle.  I will be getting a 
permanent gauge soon to keep an eye on it.  Even though my idle vacuum is 
very steady, and I do not see any vacuum/boost irregularites while driving, 
I have a feeling I have a vacuum leak somewhere, as everything else on the 
car is pretty much untouched since before the swap, except for a number of 
vacuum lines.

Of note, when the car is rolling in nuetral, rpms @ 1200, the WB is going 
crazy and leaning out.  As soon as I come to a stop it evens out and idles.  
What is up with that I wonder.

>From: "Bruce Malachuk" <bmalach1@nycap.rr.com>
>To: "'Timothy Tyner'" <shospeedenterprises@hotmail.com>
>Subject: RE: [Shotimes] Leaning out @ part throttle - opinions please
>Date: Fri, 16 Sep 2005 18:17:09 -0400
>
>Email me your .CCF file and a datalog I'll take a look at it for you. You
>did input the maf values correctly right? Also what paramters are you
>logging when you datalog?
>
>
>Bruce J Malachuk
>
>*	94 Opal Frost MTX
>*	93 Emerald Green MTX - SOLD but not far away
>*	95 Silver Frost ATX SE - SLO - Gonna be the winter beater again
>*	94 White ATX LX - SLO - $100 investment car
>*	96 TR - Cam Failed parts car :-(
>*	97 ES - Cam Failed but will be revived shortly - 9/12/05
>
>
>-----Original Message-----
>From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
>On Behalf Of Timothy Tyner
>Sent: Friday, September 16, 2005 6:12 PM
>To: shotimes@autox.team.net
>Subject: [Shotimes] Leaning out @ part throttle - opinions please
>
>Here is a brief history: When I first got the car running, my 90mm MAF was
>wired backward. So the EEC was reding a full voltage at all times. CE 
>lights
>on, MAF codes, etc, but the car ran decently enough, so that I drove it on 
>a
>140mile trip, and got 20mpg. Still, it was far from perfect, and I knew it
>needed some changes. Well, once I datalogged it and saw my MAF values
>(DOH!), I wired it up right and took it for a spin. WOT was AMAZING, car 
>was
>very quick, all readings looked spot on and no CE lights, no codes.
>
>But for some reason, I could not drive the car part throttle. Try and 
>cruise
>for 5 seconds and my WB was looking like an oscilliscope (sp?), car would
>lean out and try to die. Well, it seemed my old fix to a HEGO was no longer
>working (wire had melted once, I rewired it, but it needed a new one). 
>Well,
>I had a new harness, wired it in, got two new HEGO's, and went to town. Now
>the HEGO readings were where they should be. A full datalog showed my 
>LAMBSE
>and KAMRF values were what you would expect, all other values good as well,
>but still the part throttle leaning out.
>
>This is what I know, MAF read correctly, TPS is new and reads correctly, 
>car
>has the air/spark/fuel to make made power, and runs awesome once in WOT, 
>but
>awful in closed loop. This is what has been replaced with the last turbo
>swap: turbo, BOV, WG, trans, halfshafts etc. All of those of course not
>having an affect on my problem. BUT, I also removed the FMU, added the FPR
>(and yes, fp checked out great), removed CC, and rerouted a number of 
>vacuum
>lines.
>
>So, cliff notes: WOT = great, part throttle = crap - car leans out and dies
>within seconds. No CE lights, no codes. Idles good (though it take a while
>for it to drop below 17:1, is this normal?), datalogs from Tweecer give no
>evidence of a problem. My question to the forum, what is the problem? What
>would only present itself @ part throttle, but let the car run amazing @
>WOT? I await your answers (and as always, a prize for the problem solver,
>how does driving the turbo at Memphis for a few laps sound?).
>
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