running lean

[Grip Ronin]

you spaced the 2nd sensor and not the first one? i didnt know if the 2nd one can throw lean codes because its the first sensor that checks a/f. i used 2 sparkplug spacers. one drilled. no codes in weeks

[EZWood]

Originally Posted by Grip Ronin

you spaced the 2nd sensor and not the first one? i didnt know if the 2nd one can throw lean codes because its the first sensor that checks a/f. i used 2 sparkplug spacers. one drilled. no codes in weeks

Spaced the second(down stream) sensor. Threw a lean code, pulled spacer and got an inefficient catalyst code.

[regal]

Just get a catted front pipe with an O2 bung after the cat and move the secondary O2 sensor there.

[Fast_Freddy]

Originally Posted by Grip Ronin

you spaced the 2nd sensor and not the first one? i didnt know if the 2nd one can throw lean codes because its the first sensor that checks a/f. i used 2 sparkplug spacers. one drilled. no codes in weeks

In case you haven't already discovered this or blown your engine, never under any circumstances whatsoever install a spacer of any kind on the primary O2 (AFR) sensor. Adding a spacer to this sensor will cause your engine to run lean. Depending on the spacer effect, possibly dangerously lean. Remove it ASAP.

The secondary O2 sensor (narrowband) monitors catalyst efficiency from it's position downstream of the primary cat and is the only sensor responsible for setting the typical P0420 catalyst efficiency CEL when the primary cat is removed. The spacer goes on this sensor only and the effect is to cause the sensor to read less oxygen which it sees as a properly functioning catalyst.

[Grip Ronin]

Originally Posted by Fast_Freddy

In case you haven't already discovered this or blown your engine, never under any circumstances whatsoever install a spacer of any kind on the primary O2 (AFR) sensor. Adding a spacer to this sensor will cause your engine to run lean. Depending on the spacer effect, possibly dangerously lean. Remove it ASAP.

The secondary O2 sensor (narrowband) monitors catalyst efficiency from it's position downstream of the primary cat and is the only sensor responsible for setting the typical P0420 catalyst efficiency CEL when the primary cat is removed. The spacer goes on this sensor only and the effect is to cause the sensor to read less oxygen which it sees as a properly functioning catalyst.

i know thats what i said, to space the secondary o2. lol On this car a p0420 can be accompanied by a lean code as well. i told him not be sure not to space the first one.. but im running o2 bypass on openflash now. the spacer dont work long

[EZWood]

I have a tune. No issues anymore.

[Fast_Freddy]

Originally Posted by Grip Ronin

i know thats what i said, to space the secondary o2. lol On this car a p0420 can be accompanied by a lean code as well. i told him not be sure not to space the first one.. but im running o2 bypass on openflash now. the spacer dont work long

Sorry 'bout the misunderstanding. My bad.

Originally Posted by EZWood

I have a tune. No issues anymore.

Cool. FWIW, I'm running a Borla UEL, a mini-cat spacer on my secondary O2 and a Visconti stage 2 tune. Mostly CEL free but I just had a P2096 for post-cat too lean.

[EZWood]

Originally Posted by Fast_Freddy

Sorry 'bout the misunderstanding. My bad.




Cool. FWIW, I'm running a Borla UEL, a mini-cat spacer on my secondary O2 and a Visconti stage 2 tune. Mostly CEL free but I just had a P2096 for post-cat too lean.

I'd get away from a Visconti tune if I were you.

[Fast_Freddy]

Originally Posted by EZWood

I'd get away from a Visconti tune if I were you.

Why?

[EZWood]

Originally Posted by Fast_Freddy

Why?

I have no information from personal experience, but I've seen the power his tunes put down, and I've heard from people who have delt with him and in my opinion he is not as good of a tuner as he is made out to be. He is rude, negligent and he has been charging his flex fuel customers for an upgrade that should be included in the kit to prevent fuel from leaking. I have no Ill intentions towards him, I wish him success, but I would not do business with someone like him nor would I recommend anyone else do so either.

[EZWood]

Originally Posted by Fast_Freddy

Why?

http://www.ft86club.com/forums/showthread.php?t=48109

[Fast_Freddy]

Originally Posted by EZWood

I have no information from personal experience, but I've seen the power his tunes put down, and I've heard from people who have delt with him and in my opinion he is not as good of a tuner as he is made out to be. He is rude, negligent and he has been charging his flex fuel customers for an upgrade that should be included in the kit to prevent fuel from leaking. I have no Ill intentions towards him, I wish him success, but I would not do business with someone like him nor would I recommend anyone else do so either.

I've heard all the same viral BS on this forum spread by a handful of Visconti haters but have never been one to follow the mob mentality or care what or who is popular with them at the moment.

I've never met John Visconti or even spoken to him as my tune was done through a 3rd party shop. All I know is that he remotely dyno tuned my car, added 17whp and his tune has been without flaw.

I hear that Beethoven was a bit of a prick too but I still appreciate his music.

[EZWood]

Originally Posted by Fast_Freddy

I've heard all the same viral BS on this forum spread by a handful of Visconti haters but have never been one to follow the mob mentality or care what or who is popular with them at the moment.

I've never met John Visconti or even spoken to him as my tune was done through a 3rd party shop. All I know is that he remotely dyno tuned my car, added 17whp and his tune has been without flaw.

I hear that Beethoven was a bit of a prick too but I still appreciate his music.

If you like his work, then that's all that matters for you. Cheers