Hi Everyone.I have a 92 B2200.has been giving trouble lately.Sometimes doesn't want to start.Fuel pump,distributer cap rotor.spark plugs.replaced.Still doesn't want to start..Mechanic cannot fix because it starts when it is towed there Any clues Any suggestions would help?

 

Does it turn over when you try to start?

In any case I would check the starter circuits and make sure all ground connections and the charging system are good. I sounds like an electrical problem to me.

 

Right, you need to supply more information, like he asked above: is the engine spinning at the correct speed when you try to start it, or is that the issue?

If the engine spins but won't start, then use aerosol starting fluid to isolate whether the issue is spark-related or fuel-related. You've thrown both types of parts at it, so you obviously didn't isolate first which path to take. Always determine first: spark-related or fuel-related

 

Have you checked all the vacuum and intake hoses?