lean condition at shift points?
03-16-2008, 06:42 PM
#1
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lean condition at shift points? anybody have any ideas on this one...?
1)stock 02 ws6 a4 runs good.
2)install hooker long tubes w/ory pipe and corsa cat back.
3)buy slp pred try to program..not good..
4)take to local shop for ls1 edit and dyno.
5)get car back above 45 runs great 329rwh 346rwtq
6)problem is at 1-2 and 2-3 shift points gets weak from 100-200 rpms
before shift.tone of the motor changes and sounds like and old thrush tin can muffler.then
goes away 2nd shift comes bak again..shop can/t seem to find the problem.does not do it in park or nuetral.only under load sounds terrible tone is hard to describe almost like a jake brake?
1)stock 02 ws6 a4 runs good.
2)install hooker long tubes w/ory pipe and corsa cat back.
3)buy slp pred try to program..not good..
4)take to local shop for ls1 edit and dyno.
5)get car back above 45 runs great 329rwh 346rwtq
6)problem is at 1-2 and 2-3 shift points gets weak from 100-200 rpms
before shift.tone of the motor changes and sounds like and old thrush tin can muffler.then
goes away 2nd shift comes bak again..shop can/t seem to find the problem.does not do it in park or nuetral.only under load sounds terrible tone is hard to describe almost like a jake brake?
03-16-2008, 07:01 PM
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Since you have an auto, is it possible torque management is pulling timing? Do you know if it's been tuned out?
You mention you have a lean condition. Was this measured by a wideband O2?
You mention you have a lean condition. Was this measured by a wideband O2?
03-16-2008, 09:34 PM
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no it has not been confirmed by the o/2's.i have tried it both ways with torq man on and
off no diff.the best way to understand is to here it.by the way i work in your city.
home base is O.P,KS.maybe you could here it some time.i work off the access road on the west side of 35.parts dept with all the chevys out front.this problem has been drivin
me crazy for a year.and it's at a steadythottle up to speed that it happens not a WOT condition.
off no diff.the best way to understand is to here it.by the way i work in your city.
home base is O.P,KS.maybe you could here it some time.i work off the access road on the west side of 35.parts dept with all the chevys out front.this problem has been drivin
me crazy for a year.and it's at a steadythottle up to speed that it happens not a WOT condition.
03-16-2008, 09:56 PM
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Wow, Small world. I work a little to the east of I-35 on 135th. 
I'd be happy to listen to it, but I'm relatively new to the tuning game. It does seem strange that it's only at part throttle. If you purposely hold below the shift point does it still act wonky? What about if you were to manually shift it?
I'd be happy to listen to it, but I'm relatively new to the tuning game. It does seem strange that it's only at part throttle. If you purposely hold below the shift point does it still act wonky? What about if you were to manually shift it? 