84 firechicken

my car started life with a 4-cyl now its 305 and the q-jet has electric fuel rich and lean and i dont know what i can do to get the car to run right cause the computer has been removed and the car has been reconfigured to not use it and every time i start it it puffs smoke and is runnin way to rich

ljnowell

if the computer has been removed, and the CC Qjet is still on there, then it hasnt been reconfigured for anything. YOu need to either install a computer and the all of the wiring, or get a non CC distributor and carb and use it. You cant magically un-computer control the CC QJet

Stekman

As LJ was getting at, is the carb the original CC-qjet? Incidentally, computer controlled carbs need a computer to function. There are, however, non-cc versions. Some date to pre computer era. The canadian version also got non-cc i believe.

HamsterOnaMission

I have a similar problem.
I have a destroyed (rodent chewed) harness for a cc set up, however, the dist is vaccum advance, and there is only one conection to the carb (top facing passenger side), for two wires that i can't find.

I have a cc q-jet and cc dist as well, but they're in bad shape.

I believe i'm also running rich. Any suggestions?

If anyone has a wiring diagram of what the cc harness should look like (I can't even piuece it back together, missing sections, previous owner tried splicing, etc) I guess i could rebuild the other carb and put the other dist in.

Thanks.

five7kid

iTrader: (14)

That sound a lot like the electric choke adjustment. That exists on all q-jets with the choke on the carb itself. Almost all of the later q-jets (late-70's on) were of the electric choke variety. The "hot air" type of choke also have the rich<->lean adjustment. But, this only adjusts the choke, not the carb's other functions.

Is the problem during start-up and cold running only, or all the time?

Really need to know if this is a CC q-jet or not. The CC version has 3 electrical connections (choke, upper-passenger-side corner, and middle driver's side corner). Non-CC will have a connector on the choke, and some have one on the upper-passenger-side corner as well (Canadian and some US truck versions).

HamsterOnaMission

Note white connector on top of carb

HamsterOnaMission

Dirty and needs a rebuild

HamsterOnaMission

Any diagrams you guys have would help

five7kid

iTrader: (14)

The top picture is of a non-CC q-jet with the 2-stage accelerator pump connector. The distributor is also non-CC, with the vacuum can on the distributor base. (Nice even coat of corrosion on everything, by the way.)

The 2nd picture is of a CC q-jet and distributor. Note the 3 connectors, and the distributor doesn't have the vacuum can or mechanical advance weights. 84 firechicken, if your carb and/or distributor look like this picture, you've got some changes to make.

The 3rd picture is what happens when people tear into things they don't understand . The Haynes manual has wiring diagrams in the back, all you really need for non-CC is switched power to the Batt terminal on the distributor, and a separate switched 12v power to the electric choke. The two-stage accelerator pump is optional, but is operated by a coolant thermal switch in the thermostat housing. IIRC, it needs power to operate the larger shot for cold operation, but I may have that backwards.

HamsterOnaMission

is the two stage accelerator pump the white connector? i was unbder the impression that controlled the mix

five7kid

iTrader: (14)

Yes, accelerator pump only. The mixture ratio is controlled via internal vacuum/mechanical mechanisms.

The blue connector goes to the mixture control solenoid in a CC carb.