56ovalbug wrote:luftvagon wrote:btw.. spec of dust will screw up AFM in a heart beat.... get a contact cleaner and clean it.. make sure there is no junk under the needle such as q-tip fibers, etc...
Good point. I just looked at your pic of the AFM full sized and there's a lot of crap in there. I would carefully clean it out with compressed air or vacuum it out. Also, when replacing the cover use some type of sealant. It'll keep out the crap and eliminate a vacuum leak.
How about posting a pic of your engine looking through both the top and rear hatch. Maybe it'll show something we're all missing.
Lots of good tips given so far.. I'm sure you'll find the problem soon. Don't give up.
I needed to take a break from it for a little while. I'm back at it again.
I blew the heck out of the AFM with a can of Dust-Off. A lot of stuff came flying out of there. I then cleaned the wiper surface with contact cleaner. The Q-tip was actually quite black. I cleaned under the wiper contacts with some photographer's lens tissue which is lint free by nature. Blew more compressed air into it again for good measure.
The only other thing I did today was add a bottle of dry gas to the tank.
It started right up and idled fine. I let it warm up and advanced the throttle while I watched the wiper move smoothly. Put the cover on and held it down securely with some duct tape. I wanted to wait to seal it in case I need to go back in again soon.
Took it for a test drive. Usually it will hesitate and lurch the moment I get it out of the driveway. Not one hiccup. Drove it pretty hard trying to get the engine warm and to get it to produce the symptoms that has plagued it (me) for more two weeks now. I could not make it do it no matter how hard I tried.
I am very reluctant to call it solved. Often the first drive of the day is not sufficient enough to reproduce the issue. I am slightly optimistic, but I am in no way going to get my hopes up at this point. I tend to be pessimistic when it comes to these types of things and have a gut feeling that the problem will return sometime later today when I take it out to really put it through its paces.
Still, thanks to all for sticking with me. At least my bus is getting a much needed tune-up.
1977 Westy 2.0L F.I.
Flow with whatever may happen and let your mind be free. Stay centered by accepting whatever you are doing. This is the ultimate. - Chuang Tzu