Right started up.....no probs ISCV working...then it come off that (i think) and now goes up down up down rev wise not buy a lot say 500rpm..constant...can hear a loud hissing too All vacuum pipes are on and there are no fluid leaks.......Boost gauge is reading ok.

Do greys make a hissing noise?????????Sounds like an air leak but cant see where..the WRC inlet uses o-rings and cant be that

 

what's your idle afr? too weak can cause hunting at idle? stupid question, i don't suppose you have a wideband lambda sensor do you? yet there you are trying to do diy

 

try and find where the hissing is coming from??

 

if you suspect an air leak, spray some easystart stuff around all the joints and you'll hear an increase in engine speed when you spray over the leaky joint.

is the throttle body to inlet manifold properly tightened? that's a common leak point

are you sure the hissing is not just coming from the air going past the nearly fully closed throttle plate?

 

Hissing it aint an air leak..........if you disconnect the ISCV it goes to around 700rpm and is even......its only when itsconnected..so i am cleaning it.

Thanks guys false alarm!!!!

 

foreigneRS...yes thats what the hiss is Before i ran a piston dump valve which made the same sorta noise...so never heard without dump before...that i can remember..lol.

ISCV needed cleaning and fuel pressure needed upping a little virtually perfect now and ticks over at 1000rpm

 

Where are the pictures - and can we see the cam pullies rotating as proof of the engine running ?

 

Will put new pic post up later..with engine running

Just out to test drive now its fully warm and everything appears ok.

Back later...maybe really later if it breaksdown

 

I must admit im pleasantly surprised that you have a fuel pressure gauge Phil

 

well done mate.hope all is good

 

and probably not even from bosch