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Old 19 Aug 2016, 09:57 pm
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Default Frustrated

I have a 2004 non turbo. I can't keep it running. Replaced the ecm , speed sensor, O2 sensors, another ecm. Code is always po300 misfire, po0032&38 O2 sensors. The car will run fine for days, then the check engine light will come on, then blink, then die slow and painful, spitting and sputtering until you let off the throttle, then it dies. Anybody have any ideas?
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Old 19 Aug 2016, 10:04 pm
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Default Re: Frustrated

Quote:
Originally Posted by bsblair View Post
I have a 2004 non turbo. I can't keep it running. Replaced the ecm , speed sensor, O2 sensors, another ecm. Code is always po300 misfire, po0032&38 O2 sensors. The car will run fine for days, then the check engine light will come on, then blink, then die slow and painful, spitting and sputtering until you let off the throttle, then it dies. Anybody have any ideas?
If the P0300 keeps triggering after resetting with the OBDII Scan Tool I would suggest checking your fuel pressure. It should be 58 +/-5 PSI. Make sure it holds the pressure.
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Last edited by ptcruisersteve; 19 Aug 2016 at 10:08 pm.
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Old 20 Aug 2016, 10:17 am
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Default Re: Frustrated

Check wiring to cam and crank sensors.
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Old 20 Aug 2016, 10:51 am
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Default Re: Frustrated

Welcome to the forum

P0300 - Multiple Cylinder Misfire:

Possible Causes:
1. Fuel system problems exist
2. Erratic Camshaft or Crankshaft Sensor signals
3. Ignition system problems exist
4. Engine mechanical problems exist
5. PCM has failed

Post what has been done to diagnose the problem besides what has been posted in post #1.
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Last edited by ptcruisersteve; 20 Aug 2016 at 10:56 am.
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Old 20 Aug 2016, 11:32 am
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Default Re: Frustrated

Because Trump

Last edited by sanatanadharma; 10 Nov 2016 at 08:02 pm.
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Old 22 Aug 2016, 10:45 am
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Default Re: Frustrated

Point me as another recommendation for checking out the fuel pump. This sounds classic to a failing pump. I've experienced the same on and old Dodge Caravan, Hyundai Sonata, and a Ford F150. Pump bearing get worn and don't spin right, pump gets hot and seizes, only to act "normal" for a while once cooled back down.
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Old 22 Aug 2016, 12:44 pm
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Default Re: Frustrated

The 2001/2002 PT's have a valve on the left end of the fuel rail that can be used to test fuel pressure. On the newer models you will need a fuel pressure testing kit with an in line adapter or you can make one using fuel fittings and hose. A parts store like Autozone or Advance may have a fuel pressure testing kit in their loaner program. It may or may not come with the adapter you need.
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