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2003 Honda Pilot misfire codes 911

Tiny
FRANKMARINO
  • MEMBER
  • 2003 HONDA PILOT
  • 95,000 MILES
Check engine light came on and I pulled the codes: p0301, p0302, p0303, p0304, p0305, p0300. The engine idles and runs smooth with some loss of power. I accelerated in neutral and found that at about 5000 rpm, the acceleration gets erratic as if there was a rev limiter.
I replaced the spark plugs, egr valves, cleaned intake and replaced all gaskets with no luck.

Any help is appreciated.
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Thursday, August 15th, 2013 AT 7:12 PM

11 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So you have a constant miss fire?If you clear the codes do they come right back?Also have you done a compression test yet?
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Thursday, August 15th, 2013 AT 9:59 PM
Tiny
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Codes come back. And I have not done a compression test yet.
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Friday, August 16th, 2013 AT 2:18 PM
Tiny
SATURNTECH9
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I would do a compression test to rule that out.
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Friday, August 16th, 2013 AT 5:35 PM
Tiny
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Where can I get instructions to perform a compression test on a 2003 PILOT?
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Sunday, August 18th, 2013 AT 5:50 PM
Tiny
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All you do is remove all the spark plugs then screw in the compression tester hose hook up the gauge. Thenhold tthe throttle wide open crank the engine over 10 ten times write down the readings. Then check the other cylinders the same way.
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Sunday, August 18th, 2013 AT 6:13 PM
Tiny
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Finally got compression test done. The results are:
cylinder 1 - 250psi
cylinder 2 - 240psi
cylinder 3 - 240psi
cylinder 4 - 240psi
cylinder 5 - 240psi
cylinder 6 - 240psi
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Sunday, September 1st, 2013 AT 7:29 AM
Tiny
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Compression sounds good have you checked the fuel pressure yet?Does it miss fire at low rpm under load?Miss fire at only during acceleration?Or miss fire high ROMs under load or under random conditions?
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Monday, September 2nd, 2013 AT 10:23 AM
Tiny
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The engine runs smooth under all conditions. There is only one thing that does not sound right coming from the engine. When I accelerate under load over 2000 rpm, the engine makes a whistling sound. My wife says it sounds like the Jetsons automobile. Other than that, the car runs fine. If it wasn't for the 4-wheel drive disengaging, I could live with the check engine light on. I will clear the codes again and hope for some luck.
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Tuesday, September 3rd, 2013 AT 4:54 PM
Tiny
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Keep me posted
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Tuesday, September 3rd, 2013 AT 8:50 PM
Tiny
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No luck.
Codes come back.
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Tuesday, September 10th, 2013 AT 6:54 PM
Tiny
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So have you had to put gas in the tank since this 7 days for the light to come back on?As long as it took for the light to come on iam wondering if you have bad gas in the tank from when this all started. What codes do you have now?
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Wednesday, September 11th, 2013 AT 7:33 AM

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