Going lean on wot on e-85
#1
Going lean on wot on e-85
Well my cars been converted to e-85 for about 2 months now. I have fic 1050's, wally 255, and supporting mods. Lately I noticed when I do pulls, at wot on full boost my afrs are high 12's to low 13's. They were fine before and I do not know why they are lean now. I pulled my injectors and cleaned them they were not bad at all. I ran seafoam through my tank also. Could I have gotten bad e-85? I have been getting t all from the same station. Any ideas on what else I could check to find out the root of this problem?
#5
Account Disabled
iTrader: (38)
Check the ethanol content and see what it is now... if you were running it 2 months ago, it could have been E70, and may be back to E85 now, and that is why you are running a bit lean...As others have said check injectors, and also check for fuel leaks and pressure drops on the fuel feed line
#6
Pump is fine, running stock fpr and hose is zipped tied on.
Check the ethanol content and see what it is now... if you were running it 2 months ago, it could have been E70, and may be back to E85 now, and that is why you are running a bit lean...As others have said check injectors, and also check for fuel leaks and pressure drops on the fuel feed line
Thanks for all of the input everyone.
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#10
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Have you tried dialing back the boost just a bit to see if that brings the AFRs down? If there was a major difference in temps between two months ago and now, you may simply be taking in denser air, causing you to go a little leaner than when you were tuned in the warmer temps.
#11
Have you tried dialing back the boost just a bit to see if that brings the AFRs down? If there was a major difference in temps between two months ago and now, you may simply be taking in denser air, causing you to go a little leaner than when you were tuned in the warmer temps.
#14
Bumping this thread from the grave.
So this problem still exists. I recently tuned outside and it was about 105 degrees last week sometime. Afrs were spot on at right about 12.0 through WOT. Now a few days later I do a pull in the evening and AFRs are around 12.7ish throughout WOT. Anyone have an idea of what the problem could be?
Running v7 SD grimmspeed 3-port at 28psi stock ix turbo e85.
So this problem still exists. I recently tuned outside and it was about 105 degrees last week sometime. Afrs were spot on at right about 12.0 through WOT. Now a few days later I do a pull in the evening and AFRs are around 12.7ish throughout WOT. Anyone have an idea of what the problem could be?
Running v7 SD grimmspeed 3-port at 28psi stock ix turbo e85.
#15
EvoM Guru
iTrader: (7)
The lower temperature in the evening, compared to the 105 deg F you set your tune at, means that the air is denser and so your engine is actually getting more air. Unless you increase the fueling to match, this will make your AFR higher, i.e. leaner. E85 fueling is more sensitive to temperature changes than gas probably because of it's higher flash point and greater latent heat of vaporization.