Question about Pontiac Sunfire
Throttle position sensor, egr valve, coolant temp sensor, but really unless you are having a problem with the PCM it would show a code if any of those were out.
possibly a weak fuel pump? you would want to find out the operating pressure for your vehicle and either test it or have it tested if you are nervous around the fuel system
the fuel filter you changed, was it inline or in the tank? most of todays vehicles will have a filter mounted on the fuel pump inside the tank, some have both in-tank and inline.
just a few thoughts,
hope this helps!
Posted on May 24, 2011
Testimonial: "thanks for your help. I had the car at a GM dealer for two wks. they said they checked ignition and fuel systms. comp, valves and pwr to pcm. "
I want to suggest doing this as the platinum spark plugs do cause a multiple cylinder misfire error code(p0300) . You cleared out the O2 error and wrong type plugs can cause O2 sensors to go out. Now this is just a suggestion. Try not to panic as this can be a simple fix. Some breakdowns occur after engine is at full operating temperature and it can be wires but it is definitely an ignition problem. Let me know if this works or if you did get it fixed and thanks for using FixYa.
Posted on May 26, 2011
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Posted on Jan 02, 2017
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