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<blockquote data-quote="pappyl" data-source="post: 23680" data-attributes="member: 8730">You have 2 different codes here- p0138 indicates probable O2 sensor failure&nbsp; - this can be caused by running really rich from a bad injector - usually screws your cat however, or its an aftermarket shit injector- p0300 is most likely spark over bad fuel injectors, but...- ALWAYS pull the plugs and inspect they can tell you at lot to what is wrong- check coils and replace plugs&nbsp;&nbsp; (probably bad coil - probably caused by bad spark plug) - can use an inline spark connector, mulitmeter ohm check- if spark OK, pull the fuel rail and test injectors&nbsp; (need to pull off intake housing - not too hard, may have to push the AC lines toward rad a bit, be careful,&nbsp; DO NOT pry on the fuel rail to get the plastic intake off, can damage injector plugs, etc.&nbsp; Make sure you get the lower bolt off the oil dipstick connector plate.As per above, do you have any chain rattle going on?&nbsp; Pull the cam cover and check if chain is tight, any wear signs of a floppy chain.&nbsp; If either, agree to change that timing chain asap.</blockquote>

[QUOTE="pappyl, post: 23680, member: 8730"] You have 2 different codes here - p0138 indicates probable O2 sensor failure - this can be caused by running really rich from a bad injector - usually screws your cat however, or its an aftermarket shit injector - p0300 is most likely spark over bad fuel injectors, but... - ALWAYS pull the plugs and inspect they can tell you at lot to what is wrong - check coils and replace plugs (probably bad coil - probably caused by bad spark plug) - can use an inline spark connector, mulitmeter ohm check - if spark OK, pull the fuel rail and test injectors (need to pull off intake housing - not too hard, may have to push the AC lines toward rad a bit, be careful, DO NOT pry on the fuel rail to get the plastic intake off, can damage injector plugs, etc. Make sure you get the lower bolt off the oil dipstick connector plate. As per above, do you have any chain rattle going on? Pull the cam cover and check if chain is tight, any wear signs of a floppy chain. If either, agree to change that timing chain asap. [/QUOTE]

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