I fitted a dump valve to my car about 6 months ago and it has worked fine until yesterday.what happens is, when on idle the boost sits at about 0.2 below 0 where it used to sit well below that. It still boosts fine but there is no sound from dump valve when I release or change gear now. Instead its gone back to the chatter I used to get. I had the valve off and it moves freely enough. It is leaking a little air tho when on tickover. I assume its not the dump valve coz surly it would still work when boosting and releasing. What should I check cheeRS

 

Have you checked the rubber seal inside?

 

is the boost gauge fitted into the same pipe where the dump valve vacume is?

 

have you checked all your hoses including the one on the top of the dumpvalve going to the plenum?

also is this an ERST or a cossie?

 

is it piston or diaphram?

if the latter then the diaphram has split

 

its acossie. havent relly checked anything except for taking it off and making sure it still moves which it does. It stpped for a while, then started working again and nows stopped again. I'l cheeck all the hoses but how do i ckeck the seal?by taking it apart?

 

Yep, just take that sucker apart dude!

 

ok took it apart and theres a small split right on the rim. Is this my problem? i assume so. Can i buy just the seal? how much if i can?

 

BINGO! Get yourself a new seal they normally cost about £5 - £10 or dump the dump valve cos they really are

 

now the problem is where do i get one from in wolverhampton. tried pj's but they got none. anyone olse round here likly to have them?

 

Im not sure about in Wolves, but if you give Hi-Tec a call on 01384 561777 speak to Tony & tell her i told you to call, she should be able to sort summat out for you. There in old hill near the merry hill centre.

 

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get more than one while you're at it mate, this won't be the last time. shitty things.

 

Just ditch it, DV's suck more arse than the annual feltching convention