So I have this partial throttle misfire I've been chasing on my '88 2.0 2wd. At first I thought it was spark, so I just threw a bunch of new parts at the spark system because it was all original and I figured it would all be preventative maintenance (plugs, wires, cap, rotor, coil). When that didn't work I decided to do all the vaccuum lines (which also didn't work). With the air cleaner off I found this thing in between the carb and the valve cover. It looks like a check valve to me, but I can't blow through it either way and when I tested it with vaccuum it would bleed off in both directions slowly. If anybody has some info on how this little check valve thing is supposed to work or any ideas on what else I should look at I'd really appreciate it. Pretty soon I'm going to throw a rebuilt carb at it if I can't find anything else.
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