failed emissions testing in NJ

[BigBadSmoosh]

so I went to inspection today, passed for everything except

Hydrocarbons, I was double the legal limit

correct me if im wrong but this is unburnt fuel correct?

they also said my emissions system failed.. should I bother replacing egr, etc...

went and spoke with my old boss, he said he'd suggest putting some fuel injection cleaner in the tank with some super, maybe retard the timing a bit.. and go back..

any suggestions?

he also mentioned a wire that goes from the distributor to the ecm.. he said if i were to unplug that the ecm should retard the timing and put the truck into limp mode..

 

[nightdiver]

Put your old 195 deg. thermostat ,do the advance 10 to 12 deg ,use the cleaner and thats it
If you unplug the brown wire it will go to 0 deg. and the truck wont work right

 

[dgoodhue]

Re: failed emissions testing in NJ

You Ty is stock or pretty damn close right? It should pass without having to fool around with timing and injector cleaner. Obviously a lot of thing can go bad, but you track down the problem, maybe a bad injector clogged EGR, etc.

 

[BigBadSmoosh]

bone stock..

replaced, plugs/wires/vacum hoses/turbo.. since i got it..

im gonna take apart the egr when i get a chance.. start there, but even that shouldn't cause the hydrocarbons to be double

 

[Sy769]

If it runs well ie not rich then I'd say put on a new cat. A new cat can "help" even a modified truck pass.

 

[Flyin Ryan]

what about lowring the fuel pressure? and do what I did and just purchase a sticker

here are my numbers from last year when I tried it just for the hell of it.


HC was 837 which the standard should 100

CO% was 1.60 which the standard should be 0.50

 

[BigBadSmoosh]

yeah my HC were 204
my co% was under....

The truck is running pretty damn strong.. but if its not burning all the fuel shot into the cylinders, I want to know why..

i might just purchase a sticker anyway, but i dunno where i would do such a thing around here.. ill have to ask around.

 

[GM TURBO]

I had the same thing on the Ty. It was a bad cat. It could have also been that I did it on a day that was REALLY cold and didn't really drive the truck all that long prior - but I replaced the cat and it passed with flying colors.

 

[BigBadSmoosh]

today was freezing, and i went from my house to the inspection station, 10min away.. sat and idled for like 30min before it was tested.. but yeah..

Im gonna look for a cheap replacement cat..

 

[Mario65]

smog testing

smog testing

I had trouble with my last SY in FL a few years back. I turned the FP as low as I could and still keep a fair idle and it passed fine.

 

[BigBadSmoosh]

so it looks like im spending $100 some odd bucks to pass emissions testing..

just found out a shop near me would have given me a sticker for $60..

now in all honesty, would a afpr help my truck actually run better, I mean currently it seems to run strong as hell, aside from a little ticking and a weird boost pattern its definately a beast, especially for 99k miles.