This is topic Look at my smog chart..need help in forum Tech Talk at Northern California Ford Owners  .


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Posted by gq916 (Member # 8540) on :
 
so i have bassani midlenth headers, bassani x pipe with cats, and slp II..check out the chart and let me know what you guys think


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Posted by Adam5.0 (Member # 6995) on :
 
egr system
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by Adam5.0:
egr system
.
 
Posted by 98Snake (Member # 183) on :
 
Any other mods to the engine?
 
Posted by sydewayzLX50 (Member # 10217) on :
 
+1 on the egr
 
Posted by fasthatch (Member # 7277) on :
 
check the egr first an the cats may not do enough for nox redaction being there onl two insteed of four cats
 
Posted by gq916 (Member # 8540) on :
 
quote:
Originally posted by 98Snake:
Any other mods to the engine?
just JLT intake pretty much...car idles fine tho..how could it be the egr valve? ill still check it tho

I also have a custom tune..could that be affecting anything?
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by gq916:
quote:
Originally posted by 98Snake:
Any other mods to the engine?
just JLT intake pretty much...car idles fine tho..how could it be the egr valve? ill still check it tho

I also have a custom tune..could that be affecting anything?
only if the tune turned off the EGR.

EGR has absolutely nothing to do with idle quality unless it's stuck open, but from your results it looks like it's not opening at all.

the DPFE controls the EGR, and the system is vacuum driven, so a vacuum leak or bad DPFE (the sensor next to the EGR with 2 large vacuum hoses on it on the side of the intake) will cause the EGR to not open.
 
Posted by CobraCoupe (Member # 7233) on :
 
quote:
Originally posted by Blind:
quote:
Originally posted by gq916:
quote:
Originally posted by 98Snake:
Any other mods to the engine?
just JLT intake pretty much...car idles fine tho..how could it be the egr valve? ill still check it tho

I also have a custom tune..could that be affecting anything?
only if the tune turned off the EGR.

EGR has absolutely nothing to do with idle quality unless it's stuck open, but from your results it looks like it's not opening
+1 on checking the egr valve, see if it has been turned off in the tune


at all.
+1 tune might have EGR turned off check EGR system to see if it's working properly or working at all

the DPFE controls the EGR, and the system is vacuum driven, so a vacuum leak or bad DPFE (the sensor next to the EGR with 2 large vacuum hoses on it on the side of the intake) will cause the EGR to not open.


[ September 22, 2010, 03:37 PM: Message edited by: CobraCoupe ]
 
Posted by alexdel209 (Member # 9239) on :
 
egr your cats are working since the other numbers are low.is your timing advanced also?that raises nox
 
Posted by gq916 (Member # 8540) on :
 
quote:
Originally posted by alexdel209:
egr your cats are working since the other numbers are low.is your timing advanced also?that raises nox
timing is advanced !
 
Posted by alexdel209 (Member # 9239) on :
 
well back your timing down to stock should clean those numbers up alot depending on how adavanced it is
 
Posted by cobraracer46 (Member # 1142) on :
 
quote:
Originally posted by gq916:
so i have bassani midlenth headers, bassani x pipe with cats, and slp II..check out the chart and let me know what you guys think


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I'm assuming that you are talking about your 96 Cobra, but for all I know, you could be talking about a Camaro or a Dodge. Why make us read between the lines? You should have eliminated any confusion for those of us that don't have a crystal ball by stating the year make and model of the car that failed the smog inspection right from the start. Just a thought.

You then go on and say "so i have bassani midlenth headers, bassani x pipe with cats, and slp ...." what "you have" is not important, what is important is what has been done to the vehicle.

So what causes high Nox emissions? Too much timing advance, high engine temps, lean mixtures, defective EGR and more.
 




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