plugs 1,3,5 foul and the fuel economy is terrible
the check engine light is on
i get a code P0300 multiple random misfire
the car seems to run fine
when i clean the plugs and its cold
for about 20 min
then it stumbles on acceleration
i have swapped the injectors , coils ,removed the cats,& mufflers
swapped plugs on the 02 sensors
soaked intake with carb cleaner
im thinking fuel pressure regulator , or bad timing on camshaft passenger side i think it may be off a few teeth
but it runs fine when its cold .....
the engine is smooth at idle .....
its when u drive it thats its a problem .....
i dont know what else to do
taking off the timing cover is a last resort thanks .:Sean:.

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It might be the ECU . The ecu has Injector driver that might me misdelivering fuel.. just a thought
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but is is possible for only one side of the engine ?
i will look into this i have some pics of the plugs
they r from left to right 1,3,5 &amp; 2,4,6,
http://www.auctiva.com/hostedimages/...aspx?gid=63260 8&amp;image=88389090&amp;images=88389090&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1



http://www.auctiva.com/hostedimages/showimage.aspx?gid=63260 8&amp;image=88389116&amp;images=88389116&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1



http://www.auctiva.com/hostedimages/showimage.aspx?gid=63260 8&amp;image=88389124&amp;images=88389124&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1



http://www.auctiva.com/hostedimages/showimage.aspx?gid=63260 8&amp;image=88389168&amp;images=88389168&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1








http://www.auctiva.com/hostedimages/...aspx?gid=63260 8&amp;image=88389239&amp;images=88389239&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1



http://www.auctiva.com/hostedimages/showimage.aspx?gid=63260 8&amp;image=88389256&amp;images=88389256&amp;forma ts=0&amp;f ormat=0&amp;lgdin=1



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Edited by: seantg

 

are you running stock plugs? Try gaping them just a little less to see if they burn all the fuel off then.
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when i got it it had regular NGK plugs
then as part of the trouble shooting process
i put in the NGK platinum plugs u see in the pictures
so what i will do is make the gap a little smaller on the 3 im having the
problems with
im going to do that right now !!!
thanks for the suggestion .:Sean:.

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Edited by: seantg

 

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yes I hope it helps I had a similar problem with a Evo 8 that I had and I ended up gapping the plugs at at .240 to make it run right












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