78 FJ 40 wont idle

[MudBoy2]

Hi all,

I have a 78 FJ 40 that has been running ok for about a year as my daily driver but has been having some trouble the last few days. I have noticed that it was running pretty rich (i think) the last month or so since the mileage has dropped to about 7 mpg and it backfires when you get off the accelerator, but now it will not idle for more than a few seconds. I can start it right up and make it run by feeding it gas but if I stop it will die. There seems to be no difference with hot or cold motor and I put some fresh fuel in the rear tank and that did not help either. Any thoughts? Electric systems seems to be running strong and it does not feel like a "miss." Removing the air filter does not help so I don't think that it is suffocating. The carb was replaced at one time with a Rochester Carb which I can't seem to find parts for any more.

My feeling is that it is carb related but I am also open to other thoughts and suggestions. If you were going to replace the carb what would you use? Weber any good?

Any how, thanks for any help.

 

[Sharp38]

Check you timing to make sure that it hasn't changed. Check for vacuum leaks. Idle circuits in the carb may be plugged with debris. If timing is ok, focus on carb.

Don

www.wolfcreekrodworks.com

 

[MudBoy2]

Thanks for the tips Don. I'll check the timing and vacuum lines.