over/under boost

[oblark]

When coming home this evening I noticed when given the old girl some welly she would boost to 1.4 bar but then she would only boost to 0.6 bar,

When I started the car she idles ok but when the engine was cold it ran like it had a miss fire, this went once the engine warmed up.

Could the two faults be linked ???

All the hoses have been checked and are OK, so any ideas ????

[claymore]

Iffy BCS would be my first thought.

[Jamest5r]

Iffy BCS would be my first thought.

Yep that or the maf.

[woody]

MAF had me, very odd running indeed, then packed up completely!

[oblark]

MAF had me, very odd running indeed, then packed up completely!

The MAF is about 3 years old and it replaced one that failed all of a sudden.

[oblark]

I changed the BCS today and no different but I notice that the waste gate was seized/stiff to move, so some WD40 was sprayed on it and moved it back and forth, Ha presto problem gone, boosting back to normal :smile:

[M-R-P]

Glad to see somebody else have that problem with a 16t, I though it was just me lol.
Keep an eye on it as mine stuck 3 times in all. he last time, I sprayed some silicone grease on it before the plusgas in the hope that the plusgas would flush the hi-temp silicone stuff ito the bush. I've not had a problem since.

[V70 Graham]

Glad you had a nice, easy and cheap fix Rob.

[oblark]

The more I work on the old girl the easier and simpler she is to fix :smile:

[Saaamon]

Should you be able rod on the actutor by hand then? Where do people spray them with lube to un-stick them? Sorry for the questions just intrigued.

thanks. simon.

[oblark]

I took the actuator rod off of the waste gate arm and sprayed the WD40 on the arm where it goes into the turbo outlet housing.