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Misfire

Tiny
JAMESPARKERAUTOMOTIVE
  • MEMBER
  • 2007 SUZUKI FORENZA
  • 77 MILES
07 suzuki forenza - replaced thermostat, head gasket, valve cover gasket, intake manifold gasket, tps, brake switch, spark plugs, ignition pack. Has newer water pump and timing belt. Getting CEL and misfire on 2 and 3, codes po300, po302, and po303 - having troubleshooting what to do next - please help
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Friday, May 17th, 2013 AT 11:29 AM

5 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check your fuel pressure should be 55-57 psi
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Friday, May 17th, 2013 AT 12:21 PM
Tiny
JAMESPARKERAUTOMOTIVE
  • MEMBER
  • 2 POSTS
Did all pressure checks, vacuum, fuel, plugs, everything is good, of course did fuse checks too. Thanks
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Friday, May 17th, 2013 AT 1:00 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Then check compression and check coils for resistance.
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-1
Friday, May 17th, 2013 AT 3:03 PM
Tiny
ALLPRO82
  • MEMBER
  • 1 POST
Suzuki's are different than most any other vehicle on this misfire thing. One of the most common things that fixes this problem is by purchasing a remanufactured throttle body with a blue or green dot on it and do a relearn procedure using only a tech 2 scanner. Yes, you have to buy the scanner too but they're only a couple hundred dollars.
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Monday, January 2nd, 2023 AT 8:55 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
Excellent addition to this thread! Please feel free to use 2CarPros anytime!
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Monday, January 2nd, 2023 AT 2:04 PM

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