Codes codes P0300, P0303 and P0304, engine in limp mode?

Tiny
JSHADE93
  • MEMBER
  • 2013 FORD FUSION
  • 1.6L
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 106,000 MILES
I have the car listed above that while on the road to Texas stalled out on my wife and basically went into limp mode. Bought and obd2 reader and got codes P0300, P0303, and p0304 stating all misfires. Replaced the spark plugs and still didn’t help. Took to local mechanic shop that was available on Christmas Eve, they checked coils, compression test, they tested for spark and also fuel pressure but the only thing they came up with was the high pressure fuel injectors, spent $500.00 and replaced those but it didn’t fix the problem. They are advising me now to chance the ECM stating that’s really the only thing left to cause these codes. I’m now reaching out trying to get more opinions and advice.
Friday, December 27th, 2024 AT 10:17 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
I have seen the turbos fall apart on these cars and cause huge internal vacuum leak. I would remove the intake or exhaust tubing to check the turbo endplay/condition. If the turbo is okay, you may have a catalytic converter that has come apart blocking the exhaust. When you say you spent $500 on injectors do you mean the high-pressure pump?
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Saturday, December 28th, 2024 AT 11:48 AM

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