couped

since ive gotten my car about 8 months ago ive been noticing a steady decrease in power, its only a d series and because of that ive been putting it on the back burner..
stock exhaust from the manifold to the muffler which is new oem

could this steady power loss be due to a clogged cat
any ideas such as plugs, wires, timing, bad air flow have been ruled out

appreciate the help in advanCe

boredom

found your answer in the question

5literbeater

could be a clogged cat or maybe a fuel filter becoming increasingly restricted. also check air filter

mercuryman757

possibly a tired fuel pump or old fuel filter , or a weakening coil. whens the last time you did a tune up ??

mercuryman757

check the easiest , cheapest, and most common things before jumping to conclusions. if you need help ive been a mechanic for over 15 years . text me if you want its faster . 757 232 0740 .

couped

tune up done 3 months ago
i will replace fuel filter here soon just to do it, maybe thats it
possibly weakened coil or cat being clogged

will check in order from cheapest to most exspensive
i'll post back when i found problem

thanks everyone except first post

Lord Humongous

Ze truth...it hurts

Slooby

Easiest way to rule out the cat is to take it off if it is bolted up and if you can't see threw the pipe its shot.

5literbeater

hooking up a vacuum gauge is another way to check for clogged cat.