The what model? Im curious because my jeep wants to run at a richer mixture, it ran very smooth at 5 turns out. I guess i need to find a vacuum leak and check the timing. Also is there any way that i could test my vacuum advance. I really want to make sure that it isn't operating correctly before i go wrenching on it.
Correct me if I'm wrong here. I thing you guys are spot on with me needing to check my timing. I went out and put some vacuum line on the advance, and um.. well.. sucked on it. The little arm moved and it held a vacuum i.e i put my tongue over the hole and it held the vacuum. So from what you guys have been saying I think that, the timing is set improperly. It should be set so that the advance completely engaged with manifold vacuum at idle, thus when i accelerate the advance loses vacuum.
I'm still a little bit lost when it comes to the details of the advance. Should it be under ported or manifold(I get about 18 in of HG at idle)? How do I time it properly if its using ported vacuum? .... Iv got the big picture but im kinda at a loss when it comes to the details. Can someone walk me through whats going on here?
UPDATE: John, 86cj, LG, Jon In Tucson. You guys were great!
I borrowed a timing light from a neighbor, plugged the advance, marked the groove and 8* with white out, and checked the timing when the engine was warm before I made any adjustments to get a baseline. It took me a while to find the groove with the timing light, it had to been at about 20+ I could barely see it. Eventually I got it down to 8* ran a little rough but I figured that it was a good thing because it would advance with the vacuum advance. With fingers crossed I uncapped it and plugged it into a manifold port. Smoothed right out and is running great! The idle is probably a little low for normal use but I had turned it down as far as I could without it stumbling to help get me through emissions.
I think the poor timing is what could have been causing my high HC emissions but if there is anything else I could rule out id love to hear it.
Thanks again guys for walking me through this!
Tomorrow morning, I'm going to go in early after the open up so if it doesn't pass, keep your fingers crossed, I'v got time to fiddle with it and maybe get it in a second time in the afternoon. Like I said before I'm in a bit of a rush to get this thing through emissions and registered as I just sold my old DD (96 ZJ). Iv have "3 day" temp plates that expire on the 9th.