Turbo Electrovalve

[dawsy 22]

Just a quick question what does the turbo electro valve do as I disconnected mine and it made no difference to the running of the car Cheers Ian

[djadams]

Depending on what car we're talking about here it allows the control of the wastegate (old diesel/most petrol turbos) or the variable geometry (variable nozzle) vanes in a more modern/high tech diesel.

If it didn't make any difference, there must be something up - most turbos will default to safe condition (wastegate or vanes fully open, minimum boost) when control fails.

[dawsy 22]

Sorry about the lack of info its a 2001 C5 2.2 if the vanes were fully open would the turbo be louder than normal by that i mean they all have a bit of a swish to them but mine is a lot louder with very limited boost ,thanks for your reply I have had this fault for some time now and just cant find the cause Regards Ian

[Monkeyfeet]

If there's no vacuum on the turbo it should be at full boost. The greater the vacuum the less it should boost. Maybe your's is stuck on semi boost? Might be worth a look at the turbo linkages maybe. Full boost permanently should throw an alarm btw. I agree that you should notice a difference in it

[dawsy 22]

Thanks Fellas that is my job for tomorrow I will report back

[waynedance]

May I ask if stuck at full boost would that mean top end power but non low at low speed?

[dawsy 22]

May I ask if stuck at full boost would that mean top end power but non low at low speed?

I believe that is the case but mine is playing up and I am trying to go through things one at a time to try and ascertain where my fault is as I have said in previous posts it sounds like air is either blowing by or leaking I have checked for leaks and have not found any so now I am checking other avenues this all started when I changed the swirl diaphragm.Thanks Ian