Hi Guys. Firstly let me respectfully request inclusion in this forum. For you see, though I have always carried the "Blue Oval" flag, my search revolves around Weber atop a red bow tie. I know a bit sacrilegious, and I agree. What it is, is a 350 bolted into a kit of a McLaren M8 replica. However, from what I have seen it is here where there is a wealth of knowledge where I can find the answer to my Weber problems..
I am somewhat of a rookie at this and certainly at adjusting the 4 IDF rig setting atop my manifold. Knowing I had a some lean some rich condition and coughing/spitting condition, I search the web for how to's, bought Braden's HP Book and ordered the tool.
With book and sync tool in from UPS, off I go. Step by step. Check fuel system. Go. Pressure regulator, 3.25 lbs. Go. Timing, 38° total advance. Go. We are set. Loosen linkage, adjust idol and sync. A little tricky but not a problem.
Now I move to mixture adjustment. Start with 1/2 turn off of seated and needed to add 5 - 1/2 turns to reach an idle to sustain a running condition. 2 additional 1/2 turns got them to where no RPM increase was detected. Recheck air, readjust idle and sounds good. Idles smooth, revs nice . . . but alas I still have one that spits and coughs fuel from the top of the carb. In the subsequent test drive accelerated well though in a constant throttle at 1800 - 200 RPM it coughs and backfires.
This book's "trouble shooting" section leave a lot to be desires e.g. it said nothing as to a cause much less a remedy.
Any thought on what I missed?
I am somewhat of a rookie at this and certainly at adjusting the 4 IDF rig setting atop my manifold. Knowing I had a some lean some rich condition and coughing/spitting condition, I search the web for how to's, bought Braden's HP Book and ordered the tool.
With book and sync tool in from UPS, off I go. Step by step. Check fuel system. Go. Pressure regulator, 3.25 lbs. Go. Timing, 38° total advance. Go. We are set. Loosen linkage, adjust idol and sync. A little tricky but not a problem.
Now I move to mixture adjustment. Start with 1/2 turn off of seated and needed to add 5 - 1/2 turns to reach an idle to sustain a running condition. 2 additional 1/2 turns got them to where no RPM increase was detected. Recheck air, readjust idle and sounds good. Idles smooth, revs nice . . . but alas I still have one that spits and coughs fuel from the top of the carb. In the subsequent test drive accelerated well though in a constant throttle at 1800 - 200 RPM it coughs and backfires.
This book's "trouble shooting" section leave a lot to be desires e.g. it said nothing as to a cause much less a remedy.
Any thought on what I missed?
