remember my issue.
Valves are perfect - never stick, are not burnt,, and are set correctly.
Here's the real neat and terrible fact :
This is a free running problem (no load) .. like I say, you can unplug #3 cylinder and get NO RPM decrease ! , this is during idle or when you just rev the non-loaded engine.
When you drive under load it is fine . How did I prove this ? I drove the truck 'as is', THEN I drove with #3 cylinder wire removed, THEN I felt what a truly DEAD #3 would be.
Then thinking that Under Load, it was working ok , I went up a 30 degree grade , in 4th gear, at 1000 RPM - not a single stutter, putter, or anything - just smooth ..AGAIN
demonstrating it was working under load. Incidentally, under acceleration feels , is, perfect too.
So back to square one. WHY is it at idle or revved (with no load besides engine itself) does this #3 contribute NOTHING, it's amazing to unplug the wire and nothing changes with the engine rev ... whereas any of the other wires 2,3,4 cut down idle speed to almost vehicle not able to idle ! You can hear at the exhaust tip constant putter.
This is truly going to answered by a 'mastermind' or luck ?
It has every mechanic .... so far .. baffled. It must be so simple though
Incidentally, data not put in the first report is that 'the compression rise characteristic' of #3 is identical to 2,3,4.
