misfire

2007 SUZUKI FORENZA
77 MILES
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JAMESPARKERAUTOMOTIVE
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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
May 17, 2013 at 11:29 AM
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HMAC300
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check your fuel pressure should be 55-57 psi
May 17, 2013 at 12:21 PM
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JAMESPARKERAUTOMOTIVE
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did all pressure checks, vacuum, fuel, plugs, everything is good, of course did fuse checks too...thanks
May 17, 2013 at 1:00 PM
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HMAC300
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then check compression and check coils for resistance.
May 17, 2013 at 3:03 PM
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ALLPRO82
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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.
Jan 2, 2023 at 8:55 AM
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STRAILER
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Excellent addition to this thread! Please feel free to use 2CarPros anytime!
Jan 2, 2023 at 2:04 PM
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