86.5 NA emissions fail

fiyota

I ♥ Boost
May 3, 2006
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Kelowna, BC
jetjock said:
I'm not disputing that, just that of the half dozen or so I've seen none run more than about a third. I doubt his problem is coolant system related but I felt I should point it out anyway.

No worries jetjock, I was just lettin the guy know that I have heard of a few that do run at about half (including mine)
 

Rennat

5psi...? haha
Dec 6, 2005
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Tracy, CA
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I tested the O2 and it's working as described 8 times in 10sec fluxation. The EGR will be next. here's the numbers stamped on the AFM housing. 2F0587S. Greatly appreciated to all.
 

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
Not the right number. Look for a two digit code stamped next to the screw. For example, if it's 30 the distance bewteen the head of the screw and AFM body was set to 13 mm. 26 would be 12.6 mm.

If the O2 sensor is disconnected the A/F ratio will go slightly rich. Rich mixtures surpress NOx. Look at the 5 gas chart here for an idea of mixture versus precat emissions:

http://tinyurl.com/4ta5g

Tech articles, number 56: emissions analysis.
 
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Rennat

5psi...? haha
Dec 6, 2005
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Tracy, CA
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The top only shows a sticker with 197100-3300 and 22250-42030. Stamp on bottom is G010-3.
Thanks for the link... some reading to do but what a great place to really understand how things are supposed to actually function.
 

Rennat

5psi...? haha
Dec 6, 2005
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Tracy, CA
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Jetjock I believe due to the Cali sun and large magnifying glass the number you speak of is 32, very faded but this is spaced towards the screw and there is a definite space before the F#
 

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
Well, set it at 13.2 mm and see if the VF signal is in the middle range. Lots of cars idle a bit lean so it's no big deal. Besides, the lambda system (O2 sensor, ect) will compensate to a point.

On an N/A car the screw effects idle mixture more than on the turbo because the AFM measuring plate is almost closed at idle and the air that sneaks around it tends to take the path of least resistance. On a turbo it's a different story because the AFM is free flowing.

Yes, that site is a good place to start. Lots of good things on there as long as you can sort out what applies to our cars and what doesn't. I haven't been there in a while but it was the only place I could come up with a 5 gas chart without scanning the ones I have.
 
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