Engine Performance problem
1998 Mazda MPV 6 cyl Four Wheel Drive Automatic 130000 miles
My mechanic says there is air in the fuel mixture which has caused the engine to not start. He knows this because he put a tester of some sort on the fuel line. We've replaced the fuel pump and filter, the distributor and spark plugs/cables. He replaced the fuel pump again and it started and ran briefly. He tried to start it again and it ran " like a tractor". It would not start a third time. He is at a loss as to what to try next. I've tried to figure it out, but haven't gotten very far. Fuel lines? Something else? Thanks!