I have a 1986 Nissan hardbody pickup, D21 3.0L engine 6cy. 4x4. She has been parked for a number of years 5, or 6 years. Anyway, I replaced the fuel pump, spark plugs, plug wires, filters etc., . She'll start up with no problem but when she starts the idel automatically rises as high as it can go seems like. It's not the acellerator cable, and i've changed the Air Flow Meter, . However when I start it w/o the AFM it run quietly ( bumpy but quiet ) then I plug in the AFM, it shuts down. Any advice would be greatly apreciated.