ls 400 wont start
does it turn over?
put at least 5 gallons in it,dont try to crank turn keyswitch on off 3 or 4 times to get gas pumped up in fuel rail,on driver side you will see a valve stem with a cap on it ,looks like valve stem on the wheel,remove cap turn key switch on press valve stem down.(KEEP YOUR FACE AWAY FROM IT)put a rag over it push stem down with a small screwdriver this lets the air out of the lines and the fuel pump is pushing gas back in line and air out,do this 2 or 3 times to get all air out of fuel line,replace cap,now turn key switch off,let sit a minute then do the key on key off a few times,car should start.
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