84 C2500 ??

[tigwelder]

looked at a 84 C 2500 Scottsdale yesterday .69,000 miles original owner truck. i noticed it had the pollution pump and tubes going to exhaust manifolds.is there any computer stuff or cat on a 84?i didn't have a light with me and wasn't wearing the right clothes to be laying on garage floor to check it out.i did kneel down for a quick look and looked like a 400 turbo with the light duty 2500 rear end.any opinions on this year truck. it looks  like it just came off the show room floor.

[bake74]

     An 84 should have catalytic converters on it.  It had a carb on it right, I believe the computor came out on later years.

[topp]

After 1969, Light duty vehicles has all kinds of emissions.  A.I.R. pump, Egr valve, Charcoal cannister.
In 1975 Cats were added.

'84 I believe was the first year for a basic computer, which retarded the timing for knock, and thats about it.

[Grim 82]

What motor is in that truck? Sounds like a good find.

My 82 had the electronic spark control on it. I think they started that garbage when they changed the style for 81, maybe earlier even, but not sure. The full on computer stuff would be on an 87-up with the fuel injection.

[1LOW4X4]

Mine had all the smog stuff too. Also had a catalytic coverter....carb'd.

85 c20 camper special


Here is the option sheet

[zieg85]

If it is 8600 GVW it will have air pump (s), my 1985 C20 has 2 but no catalytic converters but with a 454 which may be why I don't