Few problems -Turbo rattling - increased lag - BOV not working - Please help

[Chris.Mcd]

Hi


Fitted a Turbosmart vee port BOV yesterday afternoon everything was working fine, boosting fine, idling (sp) fine and making the pshhh noise.



However last night when out for a wee drive the BOV decided not to work at all, piston was not moving and therefore no noise was created.



I took the vee port off and opened it up and checked everyone was ok.
Everything seemed normal, spring and piston was lubed enough.



Put it back together but still nothing. Decided to put old BOV back on
and now I am suffering from extreme lag. No boost till like 5500 revs.
Very sluggish, however idle is fine, its not stuttering just has alot
of lag.



Anyone have a clue why car is not boosting till late on and why the BOV has decided not to work?




Thanks

Chris

[Chris.Mcd]

Ok think I have a bigger problem than first expected.

Just went out to look at vaccum hose to see if any spilts etc but now there is an awful noise coming from the turbo area of the engine when revving.

A rattling sort of noise.

Any ideas?

Thanks

Chris
 

[Chris.Mcd]

Anyone got any advice ?

Rattling could be heatshield ?

Could the increased lag mean actuator is stuck open?

 

[colin_ross]

Anyone got any advice ?

Rattling could be heatshield ?

Could the increased lag mean actuator is stuck open?

 The rattle could be a number of things, heatsheilds can do it. Does it sound tinny like a shield or more like something internal, does it change with the speed of the engine for example?

As for the lack of boost I'd start with your dump valve. If the vacumm hose is loose air could be escaping there or if the valve itself was stuck open that would esplain why its not making boost.

[colin_ross]

Oh, while you're at it take the dipstick out and smell the oil.  Not wanting to put the frighteners on you but vta dump valves can lead to bore wash and petrol making it's way into the oil. If the oil smells of petrol it could mean something a lot more serious is wrong.

[Chris.Mcd]

Thanks for the replies mate.

The vta bov was only one for several hours so would bore wash happen in this short period of time?

Will go check all hoses around dump valve etc again. Checked all yesterday but will take intercooler off to check hoses properly.

Any other advice ?
 

[drb5]

Bore wash happens over years, not a couple of hours.

 

The rattling i agree, sounds like the turbo heat shields. Once cool, see if they rattle by tapping them.

 

Lack of boost/power sounds like something hasnt been refitted properly. Have you tried the old dump valve again to see if that works ok?

[Chris.Mcd]

I have refitted the orignal BOV already, as soon as the new bov stopped dumping, i changed over.

 The car seems fine today, boosting correctly etc. I reset the ecu last night( well disconnected batter) Seems to have went back to normal-- strange.

 I figured out it was the heatshield that was rattling.

Thanks for the advice guys