[Shotimes] Leaning out @ part throttle - opinions please

[Ian Fisher]

Tim
Did you replace the fuel filter? If the car sat for
awhile or the filter has never been replaced, it could
be clogged pretty nicely.

I'd look at mechanical issues that affect fuel. Have
you verified that the pump is good and that the sock
is still attached to it? If the pump was replaced (255
I think), was fuel line and not coolant line used?

Just some ideas..

Ian

--- Ron Porter <ronporter@prodigy.net> wrote:

> Tim
> 
> I'll pass this on to Tech SHO.
> 
> For list info & sign-up, go here:
> 
> http://lists.topica.com/lists/TechSHO/?cid=14556
> 
> To read the messages on the Web, go here:
> 
> http://lists.topica.com/lists/TechSHO/read
> 
> Ron Porter
> 
> 
> -----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?).
> 
>
_________________________________________________________________
> Express yourself instantly with MSN Messenger!
> Download today - it's FREE! 
>
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
> _______________________________________________
> Shotimes mailing list
> Shotimes@autox.team.net
> http://www.team.net/mailman/listinfo/shotimes
> _______________________________________________
> Shotimes mailing list
> Shotimes@autox.team.net
> http://www.team.net/mailman/listinfo/shotimes
> 



		
__________________________________ 
Yahoo! Mail - PC Magazine Editors' Choice 2005 
http://mail.yahoo.com