I just installed new plugs about 2 weeks ago it ran great for a couple of days had power like never before..Ok now it seems to be back to the way it was a loss of power..Is it possible that i didnt torque the plugs right and they are not firing right.

 

only one way to find out, get under there and check em

 

Did you change ALL the plugs (2 leading, 2 trailing)? Are they in the correct positions? Have you tested the coils? Are the wires connected properly, and to the correct plugs?
Are you getting any CEL?

 

HI, I have no CEL and i did change all the plugs and made sure they were all in the proper place..The coils have some miles on them and i know that one of them is good..Is it possible that bad coils can foul plugs out..

 

one affects the other...
Test them all https://www.rx8club.com/series-i-do-yourself-forum-73/diy-testing-all-rx-8-coils-gm-ls2-yukon-coils-sparkplug-wires-222641/

It could be other issues. But, I put my money on that

 

Thanks for the fast response..I will test them all to make sure

 

I was just reading about the affects of a bad coil and my car seems to have those problems bad idle..lack of power when accelerating..but what is strange is it ran great for 2 days then failed..

 

Bad coils> plugs> CAT converter> blown engine.

Check the first three, before you learn about the 4th option!


*Yes, I know. A little over dramatic. Just getting the point across

 

you know what i think happened i took my car to get an oil change they knocked off a vaccum line that took me a while to find and i had a CEL lean code i think all that extra fuel fouled the plugs..ugh

 

A lean code means there isn't enough fuel in the fuel/air mixture.

 

but if the ecu thinks it's running lean, wouldn't it dump more fuel to try and correct the lean issue?

 

That's why he said the " i think all that extra fuel fouled the plugs..ugh " part.

Logic - gotta love it.