Normal?
Check fuel filter for clogging
and dirt, and hoses for
leak.
Normal?
Check fuel pump.
Normal?
Check vapor separator needle
valve for bend and wear.
Normal?
Check ignition system
and compression
pressure.
TLDI 115A 2007
YES
YES
YES
YES
NO
Replace air rail.
NO
Repair and clean or
replace defective parts.
NO
Replace fuel pump.
NO
Replace needle valve.
9
9-19