intermittant dv chatter

[james walker]

guys, noticed recnetly in low gear the dv dumps normally with the normal whoosh sound, in higher gear i.e 4th or 5th then it occasionally chatters, like the turbo stall sound....

anyone else get this, ive got forge 006 reversed at the minute but it did it the other way round aswell.

i do have loud whooshing noises on part throttle also, kind of like a sucking noise and if i hold the revs then it constantly sucks then dumps and occasionally chatters?

now when i bypassed n249 i binned the oe pipework, so at the minute i have larger diameter vac pipe from the metal vac source then a smaller vac pipe inside the larger one from the dv top to the vac source if you understand me?? wondering if this could cause the siisue at all? or any other issue it could cause....

induction sounds very whooshy to me. also worth noting i have lean running values aswell.


hmmh, stumped tbh.

 

[james walker]

should of said, i have now reversed the n249 bypass so back to stock n249 running

 

[rsmith]

My 007p occasionally chatters, only chatters when i am in 1st/2nd moving very slowly then when i build up RPM, like i am going up a small ascent and then dip the clutch, its like there is not enough boost to open the DV for it to dump, as i have the N249 bypass and the a yellow spring, i am thinking this is why it is happening.I am not worried about it as its only a minimum amount off boost going back over the turbo.

 

[james walker]

right, been out and its happening all the time in 6th, occasionally in other gears, never did this before.

 

[wayne lcr]

have you done any logs james to see if you got a boost leak? since ive put the stand air box back on and now running the dv in reverse my dv only gives a little dump now.and its a brand new 007.

 

[james walker]

boost logs are fine, only issue with logging is slightly running lean and thats causing some timing pull.... recently occured issue this chatter

 

[james walker]

anyone else... maybe dodgy dv, was serviced 6 months ago ish, new o rings piston and regreased??

 

[wayne lcr]

was it the dv then james

 

[james walker]

no idea yet mate, havent tried another one....

 

[james walker]

any other ideas please... doing this pretty much all the time now.

 

[james walker]

is it possible for a forge one to be broken... or is it likely the o rings go...

seems to have deteriorated over 2 days, wondering if the dv has shat itself?

 

[Steely]

006 is a piston type still isnt it, i had issues where the piston can stick shut so the vac isnt enough to dump everytime,

give it a strip down, not got any vac leaks on the vac side of the dV have you?

regrease the o-rings, I work with compressed air systems as a job so managed to get hold of a silicone based o-ring grease ( used on systems in excess of 150 psi pressure, ), its superior to Forge's supplied grease TBH, its temp threshold is fantastic, ,

pm an adress and i can send some out if you want might cure it,

 

[james walker]

yeah piston type, hav e split in pcv hose after the pcv valve.. was there befor that split though

pm on the way

 

[james walker]

noticed now the 006 chirped when reversed... it now doesnt chirp at all just chatters.... any ideas?

 

[rsmith]

noticed now the 006 chirped when reversed... it now doesnt chirp at all just chatters.... any ideas?

Why don;t you revervse it back to normal, failing that i would put back on the standard Dv and see how you go.

 

[james walker]

does the same when reversed back mate..

trying the apr r1 now, diagphragm based so no sticking there