starting problems with hot engine

[gtnmuddy]

I have brought my 84 CJ-7 with a 355 SBC back on the road after sitting 6 years. I have a Edelbrock performer intake and a Edelbrock 1405 carb with a 1" aluminum spacer between manifold and carb.

When starting cold, 1 pump of the peddle and it will start but I need to let it idle for about 15 seconds before I move the jeep. If I try to move it, it will stumble and may die.

After driving the temps are about 180 degrees and will run fine. If I shut off the engine and let it sit for say 5 minutes I need to crank it for about 10 seconds before it will start. Pumping the peddle dosent seem to help it start.

Now, 6 years ago I did not have any issues with restarting, usually 2 or 3 revolutions of the engine would make it start.

After talking to a speed shop they say that the newer gas will boil off quicker than in the past. I asked about a plastic or wood spacer to replace the aluminum one they said it most likely would not help. I needed to remove the hot air from under the hood to keep it from boiling off the gas in the carb or a electric fuel pump to fill the carb bowels before cranking the engine.

I do believe that the gas we use now is worse than it was 6 years ago and with the additives the EPA is putting into the gas might well cause this issue.

I have replaced the fuel pump and have great volume and pressure at the carb.

Anyone have any thoughts

Larry

[MagicRat]

I think you have a choke control problem. The choke pull-off may not be working and your choke heater may be bad. Also the choke linkage may be sticky/dirty.

Fuel quality is not an issue. Fuel has not changed enough in only 6 years to make a difference imo.

[Samueljose]

yes the problem can be that of not manage the choke properly.