mk4 black smoke from exhaust HELP

[orangejuice]

Can any1 help, i Have a 99 AGU mk4 1.8t golf with 195 remap, lately the car has started smoking from the exhaust when at running temp, starts off with a little black smoke on tick over but when you rev it is alot worst, if you hold the revs on it clears, its just the initial rev or launch when it throws out the smoke & if you leave it ticking over for 5 min onwards it really smokes when you rev it. Any1 got any ideas, thanks.

[Wayne]

Black smoke would suggest overfueling so might be worth getting it scanned and seeing if any fault codes are stored.

[orangejuice]

Scanned for codes it came up with map sensor & temp sensor, ive replaced these & problem still there. had a recent full service as well.

[Wayne]

Scanned for codes it came up with map sensor & temp sensor, ive replaced these & problem still there. had a recent full service as well.

Could be a problem with the map in that case.

[orangejuice]

the first map i got was faulty so invested in a bosch unit, the codes have stayed clear so far, gonna clean out tb tonight & see if that helps, does the agu suffer from valve stem problems?

[Wayne]

does the agu suffer from valve stem problems?

Will make no difference, oil being burnt would be blue smoke.

[orangejuice]

i know it uses a little oil but no signs of it at the exhaust, gonna scan again this week to double check everthing. ill post how i get on

[Ant1981]

Could use a little oil on start up if it were valve stem seals.

[orangejuice]

on start up it runs clear, it starts as the temp builds up to 75plus.