ok people i have a 95 wrx turbo import jdm.it has had a few mods include,
fmic,uprated pump,simtek ecu, vf35 turbo cat back 5" hks exhaust anyway i have started to notice latley that when i put my foot down hard i get a puff of smoke coming out of the exhaust.mostly when i pull away from light ect. but it is slowly getting worse now im thinkin that it could be the turbo playing up but thought i would ask you guys as im sure you are more clued up on scoobies than i am.its more a puff of smoke rather than constant it does not smoke when its sat ideling. of when i start it up.no funny rattles or weird noises.
i have not taken the turbo of yet to have a look. it does seem that after the first puff it sort of clears its self. any ideas people would be much apriciated regards.

 

is it missfiring at all???? and does it only happen when booting it?

 

Is the smoke black, or bluey-white?

If it's bluey-white, then after a run, park up, leave to idle for about 5 mins, then get someone to rev it while you observe... If bluey-white smoke comes out, chances are it could be your turbo on the way out (thrust bearing starting to fail).

 

yeah i have noticed that every now and then it will misfire when i put my foot down its only done it around 3 times. the smoke that i get a puff of is 99% bluey-white but last night when it done it looked more black but could be down to it being dark out not to sure. i have also noticed that if the car been running slowly then after a while you can see the dust ecy building up in the exhaust system so thought that might not help when i boot it as it will throw it all out but want to get to the bottom of it.

 

Try that test I mentioned above - idle for 5 mins after a run, then rev it.

Bottom line, if there's bluey-white smoke, then it's generally not good: normally turbo bearing failing... or possibly piston rings... or valve guides.

You're definitely not getting confused with condensation steam being burnt off from cold?


Note: If it's black smoke being puffed out on changing gear whilst accelerating, then that's normal(ish,lol) (as the ECU will have been mapped to go rich on WOT).

 

ok well i know that the car when mapped was set to run rich.
i will be giving the car a full service this weekend and ill see how it goes.
like i said its not bad at all but i get a little paranoid as i dont want it to be trashed. i dont really rag it i poodle around most of the time but there is always a time when i put my foot down and usally thats when i get a puff of smoke.but cheers for the help people ill see how it goes failing that ill send the turbo of for a rebuild...