MAP sensor...?

[kineticz]

Right, checked the pipework for leaks, no luck, everything is tight and secure as it should, used soapy water and no bubbles anywhere. So I'm considering whether it's the MAP sensor? The MAF went a couple weeks back so maybe the MAP has had it's day too? No fault codes on the ECU.

 

[james walker]

rare for a map sensor to go dan... is it fully flush to the housing on the toyosprts sensor pipe?

also check the o ring in the sensor, could have split causing it to leak slightly.

remind me of your running issues again mate?

 

[kineticz]

Only boosts to about 10 psi mate full throttle, no recirc sound or anything when I let off, feels like it's holding back and when it reaches 10psi it drops back to about 5

I'll check the sensor and the ring tomorrow

 

[Cowie]

Mate maybe nothing to do with your problem but have you checked your DV,serviced it lately?mine was running crap the other weekend,no boost as such and it wasn't until I realised I couldn't hear the DV that I checked it,after a service was as good as new again,just a thought...

 

[kineticz]

Hmm it's possible mate what's the best way to check it?

 

[kineticz]

Looks like you might actually be right mate I fitted the old Bosch DV and it ran better but still dropped off boost when I floored it so I suppose that's due to a weak spring.

A mate has said it's possible to block the DV mount off?

Would a dual piston DV work?

 

[gezmeister]

Looks like you might actually be right mate I fitted the old Bosch DV and it ran better but still dropped off boost when I floored it so I suppose that's due to a weak spring.

A mate has said it's possible to block the DV mount off?

Would a dual piston DV work?

I've heard that a dual piston can work on the vag engine, i'm sure stef cupra has a hks ssqv on his with no running problems

 

[Cowie]

Looks like you might actually be right mate I fitted the old Bosch DV and it ran better but still dropped off boost when I floored it so I suppose that's due to a weak spring.

A mate has said it's possible to block the DV mount off?

Would a dual piston DV work?

Do you have the forge DV mate? if so give forge a ring and ask nicely they may send you a service kit out,otherwise they don't cost a great deal mate,just new O rings,grease,and internal bit.

 

[kineticz]

Thanks for the info dude. What is it that stops the DV from working properly?

 

[Cowie]

I'd assume that the the lubrication of the piston decreases over time,causing the piston to 'stick',some new grease and piston body and it's all good again.

 

[kineticz]

Right so these twin piston valves, how do they keep the MAF happy? I've had a look but it seems they're all 100% atmos so how does it recirculate air?

 

[james walker]

tbh dan, no issues with a forge 007....
what dv do you run?

 

[kineticz]

I sold my Split-r for some cash and a cheapy recirc DV which held boost fine for a while but it appears now it's time for a new one lol

 

[james walker]

yeah id get a new forge oo7 and that should sort the issues id say dan, if its not holding boost the dv is letting go.

 

[kineticz]

I hope this is the case this problem has racked my brain for three weeks lol I miss booooooooost

 

[james walker]

dv is one of the biggest causes of not holding boost mate, other than a leak...

 

[kineticz]

PITA lol.... Well I'll get a new one and report back

What is the psi limit of the OEM DV out of interest? When I tried it still only went to 10psi but didn't drop back as much

 

[james walker]

http://www.awesome-gti.com/

cheapest around at the minute and free delivery

 

[james walker]

PITA lol.... Well I'll get a new one and report back

What is the psi limit of the OEM DV out of interest?

no idea on figures, but i know stage 2 map with extra boost the oem diaphragm will fail.

do you run standard tip aswell?

 

[kineticz]

Yeah I've got Awesome bookmarked mate they've got those DV's cheap on ebay too atm thanks

Forge TIP mate. Just seems strange as with the OEM DV it only boosted as high as the uprated one but didn't drop back as far under throttle.