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Hi Im David, thanks for visiting the site. have a back pressure test done to check for clogged cat
take the front o2 sensor out, screw the back pressure gauge fitting in its place. start the car and let the idle settle. it should read no more than 1. then rev engine to 2500 rpms and the needle shouldnt move.
were you able to do a back pressure test?
ok. please keep me updated
glad to hear it, but when you replace coils spark plugs should ALWAYS be replaced with them in a rough idle situation as the rough idle will directly affect the plugs.
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