1995 Mazda Protege ENGINE HESITATES ON ACCELERATION

Tiny
SAINT0582
  • MEMBER
  • 1995 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 133,000 MILES
HAD A CHECK ENGINE LIGHT ON WITH THE CODE P0443- EVAP PURGE CONTROL CIRCUIT MALFUNCTION. I CHECKED FOR POWER AND GROUND AND CHECKED FOR CROSS SHORTS. EVERYTHING IS GOOD. WIRES ARE.2OHMS AND NO CROSS SHORT. ALSO I TOOK OUT THE PURGE SOLENOID FOR THE EVAP SYSTEM AND PUT BATTERY POWER TO IT AND THE SOLENOID OPENED. I SWAPPED COUPLE OF USED ECMS INTO THE CAR AND THE PROBLEM STILL PERSISTS. CHECK ENGINE LIGHT STILL COMES ONE AND WHEN I TRY TO ACCELERATE THE CAR LUGS AND DOES WANT TO GO. ANY SUGGESTIONS?
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Monday, August 10th, 2009 AT 12:35 AM

4 Replies

Tiny
RASMATAZ
  • MEMBER
1995 Mazda Protege ENGINE HESITATES ON ACCELERATION

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

To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:

Bad purge solenoid (internal short or open)
Wiring harness chafing or rubbing another component causing short or open on control circuit
Connector worn, broken or shorted due to water intrusion
Driver circuit inside powertrain control module (PCM) is bad
Possible Solutions1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly.

2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid.

3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.
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Monday, August 10th, 2009 AT 1:07 AM
Tiny
ALONZOBELL
  • MEMBER
1997mazdaB2300truck problem
accelerating in good condition
Could be a car with 100,000to
200,000 miles go to shop get
We're timing set because so time don't have pick up it could
Be another problem but some time the timing mark need be
Adjust to much horse power
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Wednesday, June 8th, 2016 AT 9:37 AM
Tiny
ALONZOBELL
  • MEMBER
Car/truck with that timing belt
at 100,000to200,000miles with
Accelerating problem bring it
A store get timing together
Could be another problem
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Wednesday, June 8th, 2016 AT 9:44 AM
Tiny
ALONZOBELL
  • MEMBER
Cylinder on the head is not open
Up properly that why don't have
No pick up at some time
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Wednesday, June 8th, 2016 AT 9:48 AM

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