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Got an issue

01BlkGTGP

Regular
Oct 1, 2008
321
0
chicago
I got a 1984 buick lesabre that we had for 10years...I recently got it back from my mechanic who installed a 307 in it and a brand new carb full tune up all the emissions were taken out and so was the computer that controlled emissions , new brakes lines fuel lines fuel filter and the gas tank was dropped and cleaned becausr it sat for a few years.

Now the issue:
I can start the car and let it idle with no issues at all but when I drive it for 10mins anf I get to a complete stop more often it jumps to a low idle it starts to chug like its about to die and it pushes out black smoke and if I dont do a small brake torque it will die

I need to know what I could do since this car needs to be my daily driver asap
 

Wrencher

Regular
Sep 11, 2011
303
856
Sounds like it's loading up @ idle.
is the choke coming off when it's warm?
You say the computer was taken out, was the carb replaced with a non-mixture control solenoid quadrajet? Or just disconnected?

If I remember right the 307's of the 80's had a heat tube/heater hose clip to warm the choke coil.
I used to convert quite a few of those to an electric heated choke coil back in the day.
 

Wrencher

Regular
Sep 11, 2011
303
856
You could run the carb w/out the mixture control solenoid working.
Might not get the best mileage but it'll work ok.

I would look @ the choke first, it should be opening up all the way once warmed up.
If it is working, you got some carb issues more than likely.
 
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