I have a 74FJ40 with the so-called "1.5F" which ran like a top but had some minor electrical bugs. One day I was in a hurry to get the truck out of the garage (to avoid CO) and stalled it. It never started again. I found the spark was weak and wanted to start fresh, so I completed a wholesale Painless rewire and dropped in a DUI electronic distributor. I cannot get it to start. I used a remote starter this time so I could see what's going on under the hood. First, I am definately getting good spark at the plugs. I get some firing in the exhaust (VERY LOUD BACKFIRING IN THE GARAGE!) when cranking it over, but it won't catch. I set the timing statically and am getting spark in both start and run key positions, but it won't catch at all. I tried rotating the DUI while it was cranking over and only succeeded in causing an explosion come out of the exhaust (so big it blew the exhaust-to-outside tube off the tailpipe). I also noticed as the engine turns over puffs of smokey air are exhausted back through the carb filter (have orig Aisin w/k&n-style round, open-sided carb) I looked inside the filter and I see oily-gassy residue. Might a bad PCV valve be playing here? Would that really have any impact on starting? Anyone have advice about the static timing of a DUI unit? Even though I ensured the rotor was in the same place when I removed the old one (just passing the #1 contact as the "BB" on the flywheel was passing the timing mark) it seems to me that since the body of the distributor is initially moving pretty freely (until timing is set) that I could easily be off 20-30 degrees! Or am I wrong in understanding that rotating the DUI unit will in fact have a direct change on the timing? Should I not try rotating it while cranking it over? When I set it on #1, that cylinder was DEFINATELY on its compression stroke. Any help?