Question about 2001 Ford Focus

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I have a 2001 ford focus zx3 with 175,000 miles. Timing belt changed last year, few weeks ago it suddenly stalled and was bucking. Replaced the plugs, ignition coil, fuel pump after doing all this the car still bucks, not as bad but, what else could be the issue ?? Any suggestions would be helpful . I read some where that disconnecting the battery would reset the computer and fix the issue ?? Thank you !

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  • Contributor
  • 16 Answers

You might try the the fuel pump relay switch. This can cause all of the things you are mentioning.

Posted on Apr 22, 2014

Testimonial: "I read if the relay switch isn't working then the car wont drive ? My daughter has been driving it. I am her mom and know nothing about cars, just googling everything lol"

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 64 Answers

SOURCE: 99 5.4 Expedition issues

P0401 - EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.

  • Vacuum supply
  • EGR valve stuck closed
  • EGR valve leaks vacuum
  • EGR flow path restricted
  • EGRVR circuit shorted to PWR
  • VREF open to DPF EGR sensor
  • DPF EGR sensor downstream hose off or plugged
  • EGRVR circuit open to PCM
  • VPWR open to EGRVR solenoid
  • DPF EGR sensor hoses both off
  • DPF EGR sensor hoses reversed
  • Damaged EGR orifice tube
  • Damaged EGRVR solenoid
  • Damaged PCM

P1299 - Cylinder Head Over Temperature Protection Active Indicates an engine overheat condition was detected by the cylinder head temperature (CHT) sensor. An FMEM Strategy called Fail-safe Cooling was activated to cool the engine.
  • Engine cooling system concerns
  • Low engine coolant level
  • Base engine concerns

P0300 - Random Misfire The random misfire DTC indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring.
  • Camshaft position sensor (CMP)
  • Low fuel: less than 1/8 tank
  • Stuck open EGR valve

P0443 - EVAP Control System Canister Purge Valve Circuit Malfunction The PCM monitors the EVAP canister purge valve circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified purge duty cycle by PCM command.
  • VPWR circuit open
  • EVAP canister purge valve circuit shorted to GND
  • Damaged EVAP canister purge valve
  • EVAP canister purge valve circuit open
  • EVAP canister purge valve circuit shorted to VPWR
  • Damaged PCM

P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
  • VPWR circuit open
  • CV solenoid circuit shorted to PWR GND or CHASSIS GND
  • Damaged CV solenoid
  • CV solenoid circuit open
  • CV solenoid circuit shorted to VPWR
  • Damaged PCM

P1309 - Misfire Monitor Disabled When the misfire monitor is disabled, usually due to the input signal generated by the camshaft position (CMP) sensor, by sensing the passage of teeth from the CMP wheel.
  • Camshaft position sensor
  • Powertrain control module
  • ECT, MAF, and CKP sensors

with the codes you have here I would look in the direction of the egr valve first because that will cause the bucking and stalling, and the misfires, but so will the canister vent solonoid. the misfire codes and the cylinder overtemp code could be from overheating or because if the misfires.

Posted on Aug 02, 2009

  • 64 Answers

SOURCE: Engine turns over but won't start / 1995 F-150

Sounds alot like the ignition sensor. In my old Chevys it was under the dist cap, mounted on the dist itself. Mine was flat, slightly curved rectangle shape, with two flat prongs coming out both sides. If it would get an internal break in it, you cant see it. I would have the same problem as you, part was only about $12. And comes out with unscrewing two screws.
Might want to give it a shot.

Posted on Sep 21, 2009

  • 2 Answers

SOURCE: Windstar 2001 had it since new. over 120,000 miles

The problem with your van is the CAM Sensor, I believe the noise you are hearing is kind of a chirping sound. I just had mine fixed (12/19/09) it was about $150 for parts and labor from a local Mech. not a dealer.

Posted on Dec 21, 2009

wracefans24
  • 1985 Answers

SOURCE: I have a 93 ford escort. 1.9. I recently had the

If it is not turning the check engine light on it won't be a sensor causing it.
So you need to go back to basics,Have you replaced the fuel filter lately?
it also sounds like some moisture in the fuel system,beyond that check plugs and coil.

Posted on Dec 25, 2009

skychief2001
  • 21873 Answers

SOURCE: Replaced plugs and coil pack on 2001 ford taurus now car will not start

You will need to figure out if you have spark to the plugs, and if not- if you have voltage to the coil to proceed.

Posted on Aug 04, 2012

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