sometimes it runs perfect and sometimes it backfires

2005 TOYOTA 4RUNNER
390,000 MILES
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FROST
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2005 toyota quantum refuse to rev up and sometimes backfire and also struggles to start. done a diagnostic and only fault was a cam sensor which i replaced but problems still there
Oct 4, 2011 at 5:33 PM
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KHLOW2008
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After replcement of the camsensor, is the trouble code still the same?
What is the exact trouble code?
Which engine do you have?
Oct 4, 2011 at 6:06 PM
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FROST
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yes trouble code still the same.did check wiring.
the exact trouble says cam sensor
petrol engine 2.7
Oct 4, 2011 at 6:18 PM
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KHLOW2008
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I need the code number.
Oct 7, 2011 at 5:23 PM