Yes, spraying some carb and choke cleaner into the breather hose near the intake manifold does get it to start.
Pulled the spark plugs yesterday.....ceramic insulators looked almost clean and white.....this would indicate a lean condition.
When the key is turned, the fuel pump whines as it should for a few seconds, and also whines while the engine is running.... indicating that it is working. Even though it is audible, that does not indicate that it is working as it should, delivering the correct volume.
On takeoff, if I baby the throttle, and slowly feather it, the vehicle will come up to speed. But, trying any fast acceleration, either while underway, or from a dead stop, will make the engine knock and sputter, and bog down.
Also, I notice a foul rotten egg smell while driving. I would suspect the catalytic converters, but those were just replaced 6 months ago.
With all this in mind....is the fuel pump still a prime suspect? Thanks in advance.