Blitz dumpvalve and idling problems

[mazheriqbal_mohammed]

Hi all just got a secondhand blitz dumpvalve for the scoob with fitting kit for a classic MY00 which arrived in the post today. Got the part put onto the car with minimal of fuss and then fired up my baby for a quick run to test out my handywork. Going from a cold start the car behaved as normal, then when sufficiently heated up i gave it some revs to test the dumpvalve. Valve Whooshed away beautifully and the performance of the car seemed as normal but when i got to a set of traffic lights and dipped the clutched the revs of the car went below 800rpms (where they usually idle) to around 500rpm then darted back up. Then at the next stop the revs went right down and the car stalled

Having previously had a baileys dumpvalve on the car that i put on myself i am confident i fitted the dumpvalve correctly so confused as to what the problem is can anyone help???

Cheers

Iqy

[scoobyfuzzy]

possibly the spring in the dv is too soft, i had same kind of problem, changed the dv to a different one and it was fine

fuzzy

[p1ggm]

have you made sure ll pipes and connections are tight, mate fitted a ssqv the other week and has the same prob

he had a leak

[mazheriqbal_mohammed]

Hey guys cheers for the advice

When i got the Blitz dumpvalve all the instructions are in Japanese and with my Japanese being a bit rusty thought i would have to guess a bit! The d/v seems to be adjustable at the top, with a long theaded pin and bolt. I have figured that tightening the pin seems to tighten the spring of the d/v but i am unsure if this is adviceable but will give it a try and see what happens

<< have you made sure ll pipes and connections are tight >>

Used the existing blanking plug from the old d/v (which worked fine!) so the only other bit that could be loose would have been is the adaptor to the intercooler. Will give it another go and see what happens, i just hope previous symptoms are not a sign the d/v is knackered?!?!?

[Andy N]

Hi Iqy, I have had this problem with two Blitz dump valves in the past and it was due to faulty items. They were both drawing air and causing poor idle and both were sent back to Racelogic to be replaced.

[mazheriqbal_mohammed]

Hi Andy how you doing mate

<< I have had this problem with two Blitz dump valves in the past and it was due to faulty items >>

Crap, that is what i was possibly fearing was the problem.

Although got some advice from AndyF and he adviced i have had a mess about with the tension of the spring by tightening it up more, did this but the problem still persists but the decrease in the revs is only to about 600rpm's now.

Just to get opinions the problem only occurs for the initial return to idle revs and then almost instantly the revs go back to 800rpm's and hold there consistently as per usual so i am wondering if it is worth leaving the d/v on and putting up with it or to replace with my old valve? The reason i ask is that i read on scooby net that d/v such as the hks can cause irratic idling, so is what i am experiencing just a normal function of this type of d/v (but judging by Andy's reply it may just mean the d/v is bitting the dust!!).

Cheers

Iqy

[Edinburgh-Chris]

Mate,

I have the exact same problem with my Blitz BOV.......i am glad i am not the only one!

When i gun my car after warm up the revs bounce up and down for a couple of seconds and then return to normal. It actually stalled on me the other day when i ripped home from raceland and i got a bit of a fright!

If you hear anything from someone with sound advice drop me a line would you......am desperate to sort the thing without returning to the standard unit.

Cheers,

Chris

[mazheriqbal_mohammed]

Hi Chris

I am a bit gutted about the problem as i only just got the d/v second hand, hence the main reason why i was wondering if the slightly irratic idling is a natural part of the way the valve operates or if it is a problem that has developed over time and was the reason why the bloke sold me it in the first place

In the meantime returned back to the Baileys but will keep you posted if i hear anything!

[Edinburgh-Chris]

Strangely enough my Blitz BOV is also second hand but i got it of a wrecked STi in the scrappies!

Sounds like a formula is developing mate!!!!!

Cheers,

Chris