running rich, smells and missis

[ste drivs]

i have a 2000 mk4 golf 1.8 20 valve turbo,when i drive the car it smells like it is running rich ,and some times it pops through the exhaust when i let of the throttle at slow speeds say second gear and i put my foot on the throttle again it feels like it missis abit as there is to much fuel being used,the car has a dump valve and air filter fitted.dont no if this is the problem as they were on the car when i bought it,was also told it had been mapped and chipped so how will i no if it has,does anyone no why it is running like this or what i could do to sort it.thanks ste

[richw911]

Read these 

http://www.golfgtiforum.co.uk/index.php?topic=189447.0

http://www.golfgtiforum.co.uk/index.php?topic=94010.0

[Toby]

Does it have a decat and exhaust?

Mine allways pops n bang's i love it   ,

Get it hooked up on vag-com.

Do you have a boost gauge?

[ste drivs]

my mate has a snap on machine will this work,also i think it has had another engine fitted so were is the engine code so i can tell what engine is in it.thanks for the help,ste

[richw911]

my mate has a snap on machine will this work,also i think it has had another engine fitted so were is the engine code so i can tell what engine is in it.thanks for the help,ste

http://www.golfgtiforum.co.uk/index.php?topic=89491.0

[ste drivs]

the engine is an arz,would like to take the dump valve and air filter of,so what engine will i need to get the parts of to put it back to standed.thanks ste also the owner of the car said it had been chipped and mapped so is there a way i can tell

[Toby]

If you had a boost gauge you could see.

Keep the dv vslve, there alot better than standerd, n replace the air filter with a pipercross pannel filter n standerd air filter box

[richw911]

the engine is an arz,would like to take the dump valve and air filter of,so what engine will i need to get the parts of to put it back to standed.thanks ste also the owner of the car said it had been chipped and mapped so is there a way i can tell

ARZ is cable throttle? 

[richw911]

If you had a boost gauge you could see.

Keep the dv vslve, there alot better than standerd, n replace the air filter with a pipercross pannel filter n standerd air filter box

Not an atmospheric one? 

[Toby]

Depends what ones fitted iv no idea