Dual capacity pump wiring

[scottsdaleowner75]

Does anyone have a schematic or pics of their own truck on how the dual capacity pump is wired up? I know it is wired to a solenoid on top of the thermostat housing and then to the quadrajet but i havent any idea what color or where the leads are. Infact i believe the connectors are missing. (ino on where i can find thos would be awesome too!) My truck is a 1986 chevy scottsdale with a "H" for my 8th digit in the vin. and the engine was originally a federal emissions low altitude 305 with a non computer controlled quadrajet. I believe the vacuum decal on my radiator support reads YDR. Any help would greatly be appreciated.

[D13]

Dual capacity pump? Gotta confess that's a new one to me. Factory fuel, water, power steering are all mechanical. Since it's a gasser then you shouldn't have a vauum pump. Are you talking about the lean out solenoid on the Qjet?

[nbpro]

dual capacity accelerator pumps.?
http://www.73-87.com/7387garage/drivetrain/myqjet.htm






good luck

[scottsdaleowner75]

That be the one NBPRO! Thanks even my haynes, chiltons and the 1986 GM service manual dont show that diagram!

[nbpro]

google can be your friend

[scottsdaleowner75]

Google gave me federal emission high altitude and ca emissions. Both a the TPS on the carb. mine doesnt. was at a loss for awhile

[scottsdaleowner75]

I ended up swapping a non computer controlled carb from the same year. I just couldnt find the electrical connectors locally. I check 4 salvage yards and 3 major chains of parts stores.