1997 Honda Civic check eng light on - code p0505, p0301,p03

1997 HONDA CIVIC
205,000 MILES • 4 CYL • FWD • AUTOMATIC
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JND
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runs really rough, changed the distributor, rotor, plugs, coil, iac valve,and no change! don't want to spend more money chasing this code. This is an HX automatic. doesn't idle bad, but any kind of acceleration causes multiple misses, very sluggish. can't see any vac leaks. is the ignitor the next step?
Mar 25, 2009 at 12:16 PM
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RASMATAZ
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1997 Honda Civic check eng light on - code p0505, p0301,p03

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Mar 25, 2009 at 8:15 PM
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