Running a bit rich - thoughts to adjust?
#1
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I recently replaced my WB O2 converting from an Innovate LC-1 and gauge to a Prosport Gauge with a UEGO controller. This was done principally to ensure all of my gauges were the same. (I know that the Innovate is considered an excellent product, but honestly I have had difficulty with it from the very beginning. It has been really hard to get calibrated and stay calibrated. More recently it has been erratic.) When it was working it was showing 14.7 AFR at idle and constant throttle. However, I have always believed that the car has been running a tad rich based on carbon in the tail pipe.
The new gauge seems to indicate that the rich condition does exist with idle of 14.2 to 14.4 and 14.2 at constant throttle.
My FQS is adjusted to -3% (Position 2) already. Any thought on what else I could do to lean things out a bit?
The new gauge seems to indicate that the rich condition does exist with idle of 14.2 to 14.4 and 14.2 at constant throttle.
My FQS is adjusted to -3% (Position 2) already. Any thought on what else I could do to lean things out a bit?
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I'd want to figure out why it is running rich, especially if stock. It might be trying to tell you something's not working right (fuel pressure regulator, sticky injector, clogged air filter, temp sensor, O2 sensor, air flow meter, etc.), or that some new parts are not well matched?
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I'd want to figure out why it is running rich, especially if stock. It might be trying to tell you something's not working right (fuel pressure regulator, sticky injector, clogged air filter, temp sensor, O2 sensor, air flow meter, etc.), or that some new parts are not well matched?
I'd be afraid to tune around a problem only to have it come back and bite you later.
I did the same thing with my "rich at WOT" issue... I kept trying to tune around it rather than solve the root cause. It only would have gotten worse.
Is your car running rich anywhere besides idle? I wouldn't think that simply a rich idle would cause a sooty tail pipe. And how do you know the black pipe is not burnt oil, etc?
#6
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I'd want to figure out why it is running rich, especially if stock. It might be trying to tell you something's not working right (fuel pressure regulator, sticky injector, clogged air filter, temp sensor, O2 sensor, air flow meter, etc.), or that some new parts are not well matched?
Car is running without a t-stat (do not flame please - it is a choice that I made based on several consultations with highly capable mechanics and I know that Tom you ran without one for while) and this I know accounts for some of the soot on the tail pipe.
My point was much more along the lines of - it looked fine with the old Innovate and a little rich with the new Uego which has me wondering, which is right?
Is your car running rich anywhere besides idle? I wouldn't think that simply a rich idle would cause a sooty tail pipe. And how do you know the black pipe is not burnt oil, etc?
Car does not appears to be any oil... I have added may .5L over the last 3K miles and have a know seep in the sump gasket and AOS.
Note the tail pipe of my 951 looks just like the one of my TR6 with unburnt hydrocarbons....
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Fergus, where is your wideband sensor located? Is the AEM bung the same as the Innovate one, and if not, did you change them? (I recall that the Innovate uses quite a deep fitting).
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#8
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The info here should help (I don't see the UEGO on the list, but yes, different widebands get different values):
http://www.hptuners.com/forum/showth...cts-amp-Issues
http://www.hptuners.com/forum/showth...cts-amp-Issues
Fergus, where is your wideband sensor located? Is the AEM bung the same as the Innovate one, and if not, did you change them? (I recall that the Innovate uses quite a deep fitting).
Chris White installed the bung, so I am relatively confident that it is acceptably placed.
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I would first go to a Dyno and get something more official then check the numbers with that of a computer read out before i did anything.
You can also just double check the Fuel Pressure and verify if it is 3 bar (if thats what your chips require) You are also running stock AFM right?
You can also just double check the Fuel Pressure and verify if it is 3 bar (if thats what your chips require) You are also running stock AFM right?
#10
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I would first go to a Dyno and get something more official then check the numbers with that of a computer read out before i did anything.
You can also just double check the Fuel Pressure and verify if it is 3 bar (if thats what your chips require) You are also running stock AFM right?
You can also just double check the Fuel Pressure and verify if it is 3 bar (if thats what your chips require) You are also running stock AFM right?
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The fact that it's running rich on cruise when you should for sure be in closed loop might suggest to me that your narrowband O2 sensor could be going bad.
#13
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Did it just start acting up out of the blue or has this always been the case? How are your grounds? Temp sensor?
The fact that it's running rich on cruise when you should for sure be in closed loop might suggest to me that your narrowband O2 sensor could be going bad.