Power FC, Lambda used at wot?
29 January 2007, 02:58 AM
#1
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Power FC, Lambda used at wot?
My car has been running rather poorly lately. It runs smooth, but has been having very high knock counts in boost and wot. I noticed that the lambda is reading rather strange on the pfc commander. At idle it stays at 0.00 at does not move. Normal driving I don't see it fluctuating higher than .66 and at wot it peaks at .76. Is this a sign the the lambda is failing? Does the power fc even use the lambda at wot?
Next question, does Andy F. feel like coming to Colorado to tune my car properly?
Tuners here in Colorado don't know the system and can't get it right. Already have destroyed one shortblock and my car is starting to run just like it did when it blew up, even on 10psi.
Next question, does Andy F. feel like coming to Colorado to tune my car properly?
Tuners here in Colorado don't know the system and can't get it right. Already have destroyed one shortblock and my car is starting to run just like it did when it blew up, even on 10psi.
Last edited by kbahus; 29 January 2007 at 03:04 AM.
29 January 2007, 04:20 PM
#2
Hi.
The Lambda could be lazy & on it's way out & if the failing could be felt it would be on part throttle etc as a sort of surging whilst it is trying to make up it's mind & send out the correct signal to the Ecu to adjust the fuel.
As you say, the Lambda is not used @ wide open throttle so that will have no effect on knock / fueling levels during Wot
Put the Pfc in Graph Mode & watch the Knock level ,
is it a Swift peak or a Gradual increase to a peak level ??
Best solution is to get the engine listened to with some det cans & attach a wide band O2 sensor to get a better picture of what is happening inside your Motor.
As for AndyF Im sure for the right money he would jump on the Big Bird to you
Dean
The Lambda could be lazy & on it's way out & if the failing could be felt it would be on part throttle etc as a sort of surging whilst it is trying to make up it's mind & send out the correct signal to the Ecu to adjust the fuel.
As you say, the Lambda is not used @ wide open throttle so that will have no effect on knock / fueling levels during Wot
Put the Pfc in Graph Mode & watch the Knock level ,
is it a Swift peak or a Gradual increase to a peak level ??
Best solution is to get the engine listened to with some det cans & attach a wide band O2 sensor to get a better picture of what is happening inside your Motor.
As for AndyF
Im sure for the right money he would jump on the Big Bird to you Dean
Last edited by DeanF; 29 January 2007 at 10:25 PM.
29 January 2007, 07:03 PM
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My lambda is playing up aswell,are the universal lambdas such as the ones on ebay upto the job ? I know they wont last as long as genuine ones but there is a huge price difference !
29 January 2007, 09:03 PM
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assumnig it was tuned with reasonable AFR's whcih it sounds like you are not sure about.. eek.. you can turn the lambda off..
ETC --> Function Select --> O2 Feedback.. press down arrow to change the symbol.
But as explained the lambda is not used on WOT.
If it was fine and is playing up I would check the MAF.. depending on year.. if it is a 99 or 00 then I would change it, assuming it was fine when first mapped and now playing up.
Simon
ETC --> Function Select --> O2 Feedback.. press down arrow to change the symbol.
But as explained the lambda is not used on WOT.
If it was fine and is playing up I would check the MAF.. depending on year.. if it is a 99 or 00 then I would change it, assuming it was fine when first mapped and now playing up.
Simon
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