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2001 Ford Escort fuel system

Tiny
JTPITTS
  • MEMBER
  • 2001 FORD ESCORT
  • 4 CYL
  • FWD
  • MANUAL
  • 140,000 MILES
Why does the engine stall or jerk going from a standing start, occasionally backfires from still starts, slow to start up after sitting overnight and sometimes smells of raw gas? Have tried fuel treatments and those that have a positive effect only last as long as a tank of gas.
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Thursday, September 24th, 2009 AT 9:27 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Oxygen sensor
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
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Thursday, September 24th, 2009 AT 9:50 PM

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