Dump valve not dumping?!

S

southwalesgt

Member +
Hi there

About a month ago I fitted an induction kit to my 93 GT, but I didnt like the wastegate flutter sound coming from it. Its seemed to replace my dump valve pssssssh noise.

So I removed it last night and fitted my standard airbox and k+n panel filter back on, took it for a spin just now for a few miles and couldnt get it to dump at all. Its just a baileys dump valve and before it used to dump pretty much everytime I came off the accelerator.

What could be causing this? Ive checked the pipes from/to valve and they seem fine. Would it have seized whilst I had the induction kit on?

Any help would be appreciated.
 
durmz

durmz

Member +
southwalesgt said:
Hi there

About a month ago I fitted an induction kit to my 93 GT, but I didnt like the wastegate flutter sound coming from it. Its seemed to replace my dump valve pssssssh noise.

So I removed it last night and fitted my standard airbox and k+n panel filter back on, took it for a spin just now for a few miles and couldnt get it to dump at all. Its just a baileys dump valve and before it used to dump pretty much everytime I came off the accelerator.

What could be causing this? Ive checked the pipes from/to valve and they seem fine. Would it have seized whilst I had the induction kit on?

Any help would be appreciated.
Click to expand...


have u checked the spring in the dump valve? ie took it off and shuvved ure thumb up there?

checked the vacuum line is still on the back of it?
 
TurboDave

TurboDave

Member +
Try some thicker vacuum pipe or buy some fuel hose.

The thin crappy pipe can implode on itself and stop the vacuum reaching the bov.

Are you running a FMIC if so what one?
 
S

southwalesgt

Member +
Standard tmic, only mods are dump valve and polish/ported head! I think i'll leave it as it is for now, see if it starts dumping more after a few days. Cos when I had the induction kit on there it wasnt dumping at all, just chatter through induction kit. Its weird cos before I fitted Induction kit it dumped all the time
 
Last edited:
S

southwalesgt

Member +
On the way to work this morning the dump valve was going off as usual, think it just needed a bit of pursuation to get it going again!

Cheers guys
 
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