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2001 Dodge Stratus R/T code po300


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cgkdds
Novice

Sep 17, 2013, 10:07 AM

Post #1 of 15 (5627 views)
2001 Dodge Stratus R/T code po300 Sign In

engine misfires up to 2000 rpm and then runs good. I've replaced plugs,cap and roter.fuel pressure is good and replaced fuel with high test pump fuel 93 octane.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 17, 2013, 12:48 PM

Post #2 of 15 (5594 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

Check engine light?

What are the code numbers?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 17, 2013, 1:42 PM

Post #3 of 15 (5578 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

the only code coming up on my scanner is PO300


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 17, 2013, 2:33 PM

Post #4 of 15 (5570 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

What was the fuel pressure reading and was this taken during the failure?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 17, 2013, 3:17 PM

Post #5 of 15 (5564 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

50 PSI and yes


Hammer Time
Ultimate Carjunky / Moderator
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Sep 17, 2013, 3:26 PM

Post #6 of 15 (5563 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

Are you telling me that you had 50PSI while the car was running and misfiring?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 17, 2013, 3:39 PM

Post #7 of 15 (5559 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

yes


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 17, 2013, 3:43 PM

Post #8 of 15 (5557 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

There is a problem with that statement.

The spec with the engine running is only 38PSI at idle.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 17, 2013, 3:53 PM

Post #9 of 15 (5553 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

I'll recheck it again tomorrow and get back to you. my pressure set is at the shop and I'm already home for the evening.


cgkdds
Novice

Sep 18, 2013, 4:35 PM

Post #10 of 15 (5522 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

49 PSI running. I checked the specs in Haynes manual and it seems to fall in specs for the engine. It has the 3 liter 24 valve engine. Coupe body.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 18, 2013, 4:47 PM

Post #11 of 15 (5521 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

Not with the engine running and vacuum connected to the regulator.
This is from Alldata which is far more trustworthy than Haynes.


Regulated Pressure w/Vacuum Connected 270 kpa (38 psi)
Note: At curb idle Regulated Pressure w/Vacuum Disconnected 330 - 350 kpa (47 - 50 psi)
Note: At curb idle



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 19, 2013, 6:56 AM

Post #12 of 15 (5509 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

ok so I found a vacuum hose cracked going to the fuel pressure regulator and replaced it. still running a bit over your spec though. it's at 41.5 psi warmed up at idle. I'm not sure 3.5 psi would cause my problems but I am up to any suggestion at this point. I wish now that I would have gone into the mechanical side of car's instead of the body side!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 19, 2013, 9:18 AM

Post #13 of 15 (5506 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

Somebody is just going to have to analyze all the data using a scan tool and look for something out of place.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



cgkdds
Novice

Sep 19, 2013, 12:59 PM

Post #14 of 15 (5500 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

Yeah I was kinda leaning that way. My simple little code yanker just isnt gonna cut it for driveability issues. I know some folks at a go fast Z shop but dont know if they can help me with a Mitsubishi engine. Ill give them a shot. Thank you for taking the time to help. not just me but all the countless others as well. I'll post on whatever fix I find. The more I lok online the more I see folks having a problem with this po300 code. how I long for the good old days of tuning a carb.Wink


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 19, 2013, 2:33 PM

Post #15 of 15 (5498 views)
Re: 2001 Dodge Stratus R/T code po300 Sign In

A P0300 just means random misfire. The possible reasons or causes are infinite.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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