Having problem with 300 to .OVP>behind battary U/red with cover over 1-2 fuses your should have 2 -10 amp fuse (plug in type) Air flow (looking at engine from left side remove air cleaner (watch little hose>goes to fuel pres. regulator)this can mess up idle to infront of where air goes in (fuel lines hook up to it) Air flow sensor under where air goes in .wire comes out plugs in close to fuel pres.reg. 4 prong?