.Engine will not crank -starter motor/solenoid not getting power -battery connections poor or
battery dead
.Fuel pump doesn`t prime -fuel pump wired incorrectly -poor connections or blown fuse
-faulty fuel pump or filter -fuel tank blocked, return line blocked or fuel reg faulty
.Engine will not tart
when cranking -no fuel pressure or injectors not firing (blown fuse) -no ignition pulse signal (no spark)
-engine flooded (too much fuel) -engine compression down -injector bad wiring
.Engine difficult to start
-battery voltage too low while cranking -ignition pulse intermittent -spark plugs fouled or timing wrong
-engine temp sensor not connected or faulty -bad cold start (water) settings (too rich too lean) -bad crank
settings (too rich too lean)
.Engine runs rough -engine getting to much fuel or mis-timed -fuel pressure
too high or too low -engine has non-suppressed ignition leads -ignition firing in wrong order -vacuum line
for MAP sensor not connected -injector wiring bad or open circuit -fuel injectors are poorly positioned in manifold
.Idling problems -Idle mixture values too rich or too lean -ignition timing wrong or fouled plugs
-ECU losing manifold vacuum
.Cruise problems -Load mixture too rich or too lean -RPMcrs mixture values
too rich or too lean -TPScal not calibrated or Decel set too low -ignition timing retarded on cruise (t0map)
.Power problems -full load mixture values too rich or too lean -RPMwot mixtures value too rich or too lean
-vacuum line for map sensor in wrong position -fuel pressure droping off or not stable -fuel pump is not
large enough for amount of flow -engine timing is over advanced (detonates) -engine timing is too retarded (runs
HOT) -engine compression down
