Just bought this little truck. Trying to get it registered but she faile the emissions on me

heres the results
failed the HC on the idle test by 12 ppm
alos failed the carbon monoxide on the high speed the limit is 1.20 it read 2.60 but on the idle test it read 0?

carb has these three vacuum ports plugged off, where do they go? could this be causing the failed im?

 

hopefully this is good enough info to find out about the plugged lines:
http://www.pirate4x4.com/forum/showthread.php?t=579557

 

i looked at that earlier, they dont have the diagram for the 89 though

 

does your hood have the vacuum diagram on it?

 

unfortunatley no

 

this should work.

http://personal.utulsa.edu/~nathan-buchanan/93fsm/index.html

 

thanks bud but thats for a 93 efi i belive? mines an 89 with a carb

 

Here are the California Federal vacuum diagrams:

Files vd1 and vd2 are California

Files vd1f and vd2f are Federal

Hope these help.

 

Looks like it will go to the High Altitude compensator if it is a federal truck, or the Electronic Air Bleed Control Valve if it is Californian Emission truck.

 

If you could take a few pictures of the passenger fender well to help identify which truck you have if you dont find the sticker on the drivers door jam or on the hood that will say: this vehicle conforms to ________ as of printed date.

 

and how do i know if its fed, can, or cali? sorry if thats a dumb question

 

Federal shows that it has an air pump, california does not.

 

Did you have any luck yet?

 

still no luck guys.

i used the seafoam treatment in the carb and the gas tank. After that i changed the plugs, wires, caps and rotor and air filter. took it back for a retest and it failed worse this time around.

Im out of ideas, is there anyway to test the smog pump and egr valve?
right now im thinking it could be the timing, carb, egr valve, or possibly even a bad valve seal. but Im not sure how to pinpoint it at this point. any and all suggestions would be highly appreciated.