Strange A/F reading
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Strange A/F reading
Hey guys,
i'm running a Greddy turbokit at 6 psi at the moment, got a 3"headerback with HFC, emanage ultimate and i'm using an AEM UEGO wideband.
Since i got her tuned i had an A/F that dropped to 12.4 when going into boost and that drops to 11.5 when i keep her in boost.. ( sometimes it fluctuates between 12.4 and 11.1 depending on gear/rpm..
But since today, ( i have not changed anything ) the A/F drops to 12.x when going into boost, and then it raises up to 13.5 when im holding the throttle under WOT. ofcourse i let off the gas immediatly at that point to prevent damage.
I tried several gears, and several RPM's to see what the A/F does and it's the same sequence.. first 12.5, and then it raises to 13.X...
What COULD be the problem causing my A/F to suddenly behave like this out of the blue?
Thanks for reading/helping out!
i'm running a Greddy turbokit at 6 psi at the moment, got a 3"headerback with HFC, emanage ultimate and i'm using an AEM UEGO wideband.
Since i got her tuned i had an A/F that dropped to 12.4 when going into boost and that drops to 11.5 when i keep her in boost.. ( sometimes it fluctuates between 12.4 and 11.1 depending on gear/rpm..
But since today, ( i have not changed anything ) the A/F drops to 12.x when going into boost, and then it raises up to 13.5 when im holding the throttle under WOT. ofcourse i let off the gas immediatly at that point to prevent damage.
I tried several gears, and several RPM's to see what the A/F does and it's the same sequence.. first 12.5, and then it raises to 13.X...
What COULD be the problem causing my A/F to suddenly behave like this out of the blue?
Thanks for reading/helping out!
#4
What was the A/F raatio at when it was tuned? Has the temperature changed drastically on those days that it was acting different. Atleast its richening up and not leaning out.
#5
It is leaning out he said that it now goes to 13.XX where as before it was 11.XX
Has the temperature changed a lot since it was tuned? I know that it is pretty hot all over the U.S. right now.
Has the temperature changed a lot since it was tuned? I know that it is pretty hot all over the U.S. right now.
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I checked for a loose wideband bung, it's stil okay, i've reset the ECU, checked vacuum hoses but it's all looking great...
I don't think it's possible that the Emanage Ultimate changes its fuel maps after a while? The Oem ecu might relearn some partial throttle settings but going WOT would always be the same i guess....
Temperature has slightly dropped with about 10-20 Fahrenheit so that should not be an issue right?
I don't think it's possible that the Emanage Ultimate changes its fuel maps after a while? The Oem ecu might relearn some partial throttle settings but going WOT would always be the same i guess....
Temperature has slightly dropped with about 10-20 Fahrenheit so that should not be an issue right?
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#8
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It is possible you have a fuel restriction or your pump is going bad. You also need to check the vacuum line going to your fuel pressure regulator. You will lean out quite a bit if this comes off. Personally I would ditch the Emanage for something better though.
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Well, i got a walbro 255LPH, it has run about 10K miles... Could it go downhill so fast?
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I do THINK that the walbro "sounds" different than when i installed it. It makes a pretty loud buzzing sound when the car is idling.
I think i better replace it with a HRC fuel pump, which i heared good things about and it should be alot quieter then a walbro and there isnt a broken one thats reported so far..
A bad performing current walbro could be my issue right here but im not sure...
Thanks for the help so far!
I think i better replace it with a HRC fuel pump, which i heared good things about and it should be alot quieter then a walbro and there isnt a broken one thats reported so far..
A bad performing current walbro could be my issue right here but im not sure...
Thanks for the help so far!