Misfire

Tiny
SMIFFSON
  • MEMBER
  • 2003 HONDA CIVIC
  • 2.0L
  • 4 CYL
  • 2WD
  • MANUAL
  • 101,600 MILES
My car is misfiring on all cylinders checked the usual plugs and coil packs (Civic type r ep3) my next thought was injectors. I happened to disconnect my IAT sensor and the misfire stopped, I have ordered a new one as it is only £30 but I am thinking it is not the part that is faulty and the misfire is going away due to the extra fuel the engine management is putting in with the IAT disconnected.
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Tuesday, May 30th, 2017 AT 1:57 AM

4 Replies

Tiny
HMAC300
  • EXPERT
If the code is 0300 then it is a random misfire and may be low fuel pressure so check that as well as a vacuum leak like a broken hose/cracked/off etc. See link for fuel pressure.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Tuesday, May 30th, 2017 AT 5:44 AM
Tiny
SMIFFSON
  • MEMBER
With the IAT sensor disconnected
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Tuesday, May 30th, 2017 AT 2:27 PM
Tiny
SMIFFSON
  • MEMBER
IAT connected
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Tuesday, May 30th, 2017 AT 2:32 PM
Tiny
HMAC300
  • EXPERT
Do a compression check and get back with results as well as fuel pressure like I asked the first time.
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Tuesday, May 30th, 2017 AT 3:29 PM

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