hey ,
ive got an 86 z28 lg4 auto, and last week it started this thing where when i started it in the morning it ran real jumpy and kept cutting off and didnt want to start back up right away, like it was flooded, the whole time it would blow smoke out the exhaust. and it would do this until it warmed for about 5 minutes. well a friend tells me that my car is "loading up", but hes unsure why and how to fix it. so whats does anyone know whats going on here. thanks guys!

 

stuck choke, misadjusted choke, no power to the electric choke, or a non-functioning choke pull off. That's where I would start

 

I was just wondering how you would adjust the choke. I have an 85 lg4 if that matters.

Thanks

Ben

 

THere is no direct adjustment to the choke on that carb. It's is riveted in place and keyed to only fit in one way.

However, I would look at the little choke pull-off on the pass. side front of the carb. As soon as you start the motor the pull-off should retract fully and pop the choke open just a bit. Make sure it holds vacuum. It is very common for the diaphragm inside to rupture, leak vacuum and not pull all the way open. The result is that the car runs real rich (until the choke itself warms up and opens on it's own) and "load up" as your friend says.

There is also an adjustment on the pull-off that adjusts with a Phillips screwdriver. It will adjust how far open the pull-off pulls the choke open. Set it so it opens the choke about 3/16" as a rough starting point and then adjust it leaner (more opening) or richer (less opening) based on what the engine seems to want- like starting on a cold morning/cold engine you want it to start and idle fairly smooth after a few seconds of running. Not so lean it stalls or so rich it loads up.

The choke pull-off is available from any parts store if yours is shot.

 

The chokes aren't adjustable stock, but every rebuild kit and replacement choke I've ever seen has you drill and tap the rivet holes and use machine screws to hold the new one on. Once that's done, it's a simple matter to knock the little aluminum tab off that stops you from rotating the choke (that is if the hole tapping didn't knock it off in the first place).

I've got 3 Qjets and one Dualjet, and the chokes on all 4 are adjustable. I hate the Dualjet with a passion but that's another matter entirely.