My check engine light has been on for a while now showing 7 different codes. Random missfire, missfire cylinder 1, cylinder 2,3,4,5 and 6. The car seems to have sufficient power and doesn't seem like its missing. I'm not sure what the problem could be.

 

Forgot to mention the car is a 2004 tl 6 speed

 

did you over rev the car?

 

Not sure how this is possible

 

^missing a shift! Downshifting from 6th-3rd gear for instance.....

 

the computer only prevent you going over rev on the up shift but if you are down shifting like say from 4th to 3rd can damage your engine since there is no software can prevent that from happening on MT car. Lets say your 3rd max out at 90 mph and you are in 4th gear doing 105 and now you decide to down shift into the lower gear so feel that (Vtec) then the difference casue damage, AT car does have this prevention since the gear won't go to the lower unless you in that zone. In other word once you down shift its the wheel that turning the engine and it turn too fast for the valve spring to compress and decompress causing valve not properly closed once the piston coming back up which cause a bent valve stem leaking compression.

This is how it all unfolding.

https://acurazine.com/forums/problem...32-j37-915065/

 

If you're at 150,000 miles, give or take, you might need a valve adjustment. The exhaust valves get tight and will cause a misfire that you barely notice.

 

I have the same car and had the same problem clean the throttle and get your valves check specially if your car is over 100k miles

 

I had a similar problem on a different car, timing belt tensioner was failing, causing some weird issues. This other car would have a slight backfire in the exhaust if you stabbed the throttle at idle, up to 4k and let off. After I changed the belt and tensioner the backfire went away, along with misfire codes. Also, it would only miss at idle.
Good luck!

 

if its a six speed acura TL, it was most likely over-rev'd.

have a leak down and compression test done.
after you find the results; you probably want to change out the heads