1995 Mazda Protege Hot Hesitation

1995 MAZDA PROTEGE
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SAMSIMON
  • MEMBER
  • 1 POST
Hello every one
I have a 1995 mazda protoge 1.5L.When is cold in the morning or any time it runs good . after few milles driving start Hesitating when I accelrate the engine.this dosn't happen when the engine is cold. I replaced Mass Airflow sensor. feul pump. sparkplugs and wires.feul filter.
any dody know what is wrong plese, any help will be very appreciative
Apr 3, 2006 at 3:01 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Sounds like a bad O2 sensor giving the engine a lean condition when the computer go into open loop or it could be a bad computer temp sensor. It is located in the area of the T-stat and has two wires. the one with one wire is of the gauge.
Apr 3, 2006 at 10:40 AM

Suggested Repair

Check the oxygen sensor for a lean condition once the engine is warm, and test the two-wire computer coolant temperature sensor near the thermostat. The one-wire sensor is for the temperature gauge.

Conversation Summary

The owner of a 1995 Mazda Protege 1.5L reports hesitation during acceleration only after the engine warms up; it runs well when cold. The mass airflow sensor, fuel pump, spark plugs, wires, and fuel filter have already been replaced. The expert suggests a faulty oxygen sensor causing a lean condition or a bad two-wire computer temperature sensor near the thermostat.

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