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Have a misfire detected during driving at.

Tiny
ANONYMOUS
  • MEMBER
  • 2003 CADILLAC ESCALADE ESV
  • 125,000 MILES
Have a misfire detected during driving at moderate speed, but not during idle or slower driving. I've heard that not having the gas cap tight or air filter housing secured can cause this, but I've looked at those and they seem okay. Checked the plug wires to make sure they're on & seem to be. I've also heard that a stuck fuel injector can cause this and is there a fuel injector cleaner available that may help fix this problem? The diagnostic code is P0300B (I have a code reader)

I also have a code (U1041C) loss of ECBM communication. What exactly is that?
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Saturday, January 12th, 2013 AT 7:58 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
That is a body code.

Gas cap or air filter is not the issue.

What about basic, like plugs, wires coils? Are you up on all your basic maintenance?

Additives for fuel injectors rarely work. They need direct injection cleaning from a shop.

Roy
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Sunday, January 13th, 2013 AT 3:41 AM

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