Alright so I’m at the end of my knowledge here and what I can find by google.
69 FJ40 with later model 2F components all Frankensteined together with the”semi electronic” vacuum advance distributor
Noticed about a week ago that it was ideling rough but running fine otherwise. Checked all the usual things like fuel/air and sprayed around the carb an intake with starter fluid to see if that did anything; nothing. Ok.
Pulled all the plugs and they looked fine. Adjusted timing and thought that might have gotten me somewhere maybe it slipped timing. Next day back to the same thing ideling rough. Go to check timing again and notice my timing light isn’t lighting up on #1 cyl. I turn up the idle just enough to the point where it starts running smooth again and what do you know my timing light works again. So I try swapping plugs and wires around and nothing can get #1 to fire at an idle. I figure maybe it’s a time for a new cap and rotor.
Fast forward to today and the cap and rotor made no difference. Still not firing on #1 at idle.Now I don’t know a ton about points but I know a shop replaced them about 5,000 miles ago and I’m not sure why that would affect only one cylinder only at idle. Also here’s the odd part if I grab the distributor (not the cap) and pull down or push on it in any way #1 starts firing. So I’ve basically isolated it down to something in the main distributor. I don’t feel hardly any play at all in the thing but I don’t know how perfect it needs to be. Could it be my points somehow only messing up at idle? Is my distributor bad? I’m really at a loss here and all my more experienced mechanic friends are stumped too.
69 FJ40 with later model 2F components all Frankensteined together with the”semi electronic” vacuum advance distributor
Noticed about a week ago that it was ideling rough but running fine otherwise. Checked all the usual things like fuel/air and sprayed around the carb an intake with starter fluid to see if that did anything; nothing. Ok.
Pulled all the plugs and they looked fine. Adjusted timing and thought that might have gotten me somewhere maybe it slipped timing. Next day back to the same thing ideling rough. Go to check timing again and notice my timing light isn’t lighting up on #1 cyl. I turn up the idle just enough to the point where it starts running smooth again and what do you know my timing light works again. So I try swapping plugs and wires around and nothing can get #1 to fire at an idle. I figure maybe it’s a time for a new cap and rotor.
Fast forward to today and the cap and rotor made no difference. Still not firing on #1 at idle.Now I don’t know a ton about points but I know a shop replaced them about 5,000 miles ago and I’m not sure why that would affect only one cylinder only at idle. Also here’s the odd part if I grab the distributor (not the cap) and pull down or push on it in any way #1 starts firing. So I’ve basically isolated it down to something in the main distributor. I don’t feel hardly any play at all in the thing but I don’t know how perfect it needs to be. Could it be my points somehow only messing up at idle? Is my distributor bad? I’m really at a loss here and all my more experienced mechanic friends are stumped too.