jeddering at high speeds, blown turbo?

1.8-20v-cupra

Guest
hi every1, ill try and keep this short.
i have a mk3 ibiza cupra with a stage one, ko3s, fmic, all n valves bypassed and a few other goodies. problem is i was driving at around 100mph when the car suddenly juddered. i slowed down to 60mph and it run fine but the dump valve seemed to be alot louder. took it home, blocked up the TIP and did a compressor check to check for leaks, i found one major one, fixed it and the car seemed ok untill i started the engine and it blew loads of smoke out the back (burning oil) i let it settle as a mate said the compression check could of pushed oil into the turbo. after doing that i ran it and the smoke stopped.i took it out for a run and when i put my foot down it juddered again. boost will go to 15psi then drop to 4-5, but then will only boost to 3-4, then back down to 0. after driving it a little bit more with low revs i put my foot down and it will boost straight back up to 15. but then drop erratically to 4-5.

can anybody help me? have i blown the turbo?
 

1.8-20v-cupra

Guest
my vag com is unregistered an is crap lol and its on a mbc
 

yellonvi-R

Active Member
Sep 8, 2011
4,321
3
birmingham
Theres me out of ideas then lol if it was the turbo then i would think it would smoke constent? Ive owned around 100 turbo cars and never had one go lol so im out of sugestions ;(
 

1.8-20v-cupra

Guest
sorted lol i was running a standard dv and apparently 15psi isnt any good for them, swapped it with a 007p and its running sweet again :D
 

1.8-20v-cupra

Guest
not restrict it as such, apparently the diaphragm is torn slightly so its acting like a boost leak, bloody mk3's lol