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2004 Cadllac SRX AWD V8 Northstar
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Discussion Starter #1
Having this issue with my wifes SRX. It starts fine when cold but when you drive it and stop for 15-45 min it has a long hard start but always starts. It has 60 psi on the fuel rail and holds after cutting off so its got fuel to the injectors. I have changed the Evap purge valve solenoid, changed all plugs, changed a bad 02 sensor, and checked all coils. Also have tried checking for vacuum leaks but no luck with that either. I get the same p0300 random misfire code and both p0420 p0430 catalytic conv. Please if anyone has any other tricks let me know.
 

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2004 Cadillac SRX V8 AWD
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336 Posts
sounds like maybe you want to check with replacing those converters, and depending on miles you should still be able to. I have an 04 4.6 as well, and the factory warranty is up July 2016, and 200k miles.
 
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