Weird problem, need some help.

sharkbait · December 24th, 2010, 01:35 PM

Check the 02 sensor voltages for the front at idle

What are they in relation to the short term fuel trims when heated up properly

RyanGT · December 24th, 2010, 05:48 PM

Even with open loop tune it did this (bypasses o2 sensors). So i figured o2 was probably ok.

But when it happened o2 was funky, and was a stable reading instead of the normal signal that would look like a wave if you graph it. I was kinda leaning towards o2, since my car runs only on passenger bank (because of kb bypass). So one failing would really make things wacko. But like i mentioned same thing happened exactly with open loop tune

RyanGT · December 24th, 2010, 05:49 PM

And it was fine all day today after it was good last night. Hit 7 stores for work. So quite a few full cycles. So F'in weird!

December 24th, 2010, 01:35 PM	#61
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	Check the 02 sensor voltages for the front at idle What are they in relation to the short term fuel trims when heated up properly __________________ 410rwhp 520rwtq @ 12.9 psi

December 24th, 2010, 05:48 PM	#62
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	Even with open loop tune it did this (bypasses o2 sensors). So i figured o2 was probably ok. But when it happened o2 was funky, and was a stable reading instead of the normal signal that would look like a wave if you graph it. I was kinda leaning towards o2, since my car runs only on passenger bank (because of kb bypass). So one failing would really make things wacko. But like i mentioned same thing happened exactly with open loop tune __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

December 24th, 2010, 05:49 PM	#63
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	And it was fine all day today after it was good last night. Hit 7 stores for work. So quite a few full cycles. So F'in weird! __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

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