i dont know if somone made a thread about this but i have a 07 tl type s auto with 125k one day i was doing some pulls with my buddy and i realized after the car would start a little weird so the next day i start the car and it has a weird smell (rich smell) and i was driving i did some pulls and the car started to sputter around 2-3k rpms and act sort of weird but the sputter would go away and would only happen for when im doing like 1-2nd around 2-3k rpm but after i did some pulls it would get worse but then go away and one day i was driving and cel started flashing while i was accelerating and it was sputtering and then when i let the accelerator go it would turn off , i checked the codes for the misfire and it was a misifre on cylinder 4 and i changed the spark plug and got better , i then changed my ignition coil since i had a valve cover leak and a little of oil would get in the spark plug well and replaced the car with new plugs and that coil pack , the car was good but then the white smoke started to occur and it wasnt bad but i did a couple highway pulls and then i got home and the smoking got worse, i drive the car normal and it doesent sputter but only sometimes , people recommended to test my fuel injectors or run a can of seafoam or it can be a clogged cat ??? help please

 

How's your coolant level?

That's usually what white smoke means, coolant being burned off in combustion chamber.

If coolant is disappearing then time for a block test to look for clues of blown head gasket.

 

a clogged cat wouldn't cause white smoke.. also you didn't actually tackkle the issue with the valve cover leak and just put in a new plug/coil, now you'll just foul up the new plug

my bet is on HG leak as well, time to source a new head.

 

i did actually i put new valve cover gaskets as well as the spark plug tube grommets

 

start testing.

 

did a seafoam and it got better but came back , tested my app sensor and it wasnt that i also tested my injectors and they all reading 14.5ohms , new ignition coils new spark plugs dont know whats next to be honest

 

so... how about that compression test

 

going to be performing compression test soon i will keep touch

 

did a compression test and here how it went
cylinder 1- 250
cylinder 2- 250
cylinder 3- 230
cylinder 4- 160
cylinder 5- 180
cylinder 6- 170
im unsure why the front head with cylinders 456 has lesss compression then the back head i also did it with the throttle all the way to the floor and all plugs out