Low boost on rs2 setup

[andyg plym]

Evening lads, any suggestions on this ? Spec:

Rs turbo,manifold,injectors,inter cooler, air box ,3 inch full system with only 1 silencer high boost chips (1.9 bar) , 3bar vmap and r201 resistor mod on ecu,samco hoses and new vacuum lines. I tested the ecu in ather car and it went really well

Car was boost leak tested recently and found a leaky tb hose, adjusted and instantly improved boost from 1.3 to 1.5 bar. I say 1.5 bar, but that is a struggle...the boost gauge flickers and you feel the car holding back.

Other faults are: oil pressure warning comes on, I know it's the switch and will be fitting my new one as soon as I find time.i know they would appear unrelated but could this be contributing ? Nothing shows when put on a scanner

My main question is (if we assume the the boost system is airtight ) could this be electrical at all ? Maybe wgfv even though it appears to be quite new, maybe fuel pump related as its still on a stock s2 pump

Any help appreciated

[ManiacuV6]

Check if you have the same injectors , fuel pressure regulator . Is good to have new spark plugs and Good ignition coils.
Try to compare your car's setup with the car in which you tested your ECU .

And please check you PMs !

[Tonks4x4]

Whip the top of the wastgate and feel for play in the wastgate valve.

This was what was wrong with mine, I recently found

[andyg plym]

Thanks mate pm on its way to you

[andyg plym]

Whip the top of the wastgate and feel for play in the wastgate valve.

This was what was wrong with mine, I recently found

Thanks Brian , did you have same symptoms ?

[Tonks4x4]

Yes exactly the same, but mine was intermittent one day it would do 1 bar the next 1.2, then the next 0.7 bar and now with another wastegate it's 1.6 all the time

[andyg plym]

Il have a look, how much play did you have ? I'm leaning towards fuel pump at the minute

[Tonks4x4]

It had hardly any from the top with the wastegate lid off but once of the car the valve seat fell out and the valve had approx 8 to 10 mm of movement side to side

[andyg plym]

Am I just being stupid here but I just remembered when I put my waste gate back on the car, whilst lowering it onto the 4 studs the cap from the underside kept falling out. I had to hold my fingers under it until it was almost back on the manifold. It came out like that. Should that be connected to the shaft ? It would sit in the bottom of the waste gate and is very sooty.
Thinking about it the cars I've broken recently never had it fall out. Il have a look today

[bertman]

Its supposed to be loose Andy,some can be a right pita to get off.

[andyg plym]

Thanks rob, loose as in not connected to anything ? Thought maybe the shaft should go through it ?

[bertman]

No not connected to anything.It acts as a seat for the wg valve to close against.If it didn't come out you could not get the valve out

[macspring]

If the fuel pump is the original S2 one and it is not relayed, you'll do no harm at all swopping in a 044 pump. The original pump will be way outside it's comfort zone / ability with old age and the higher RS2 spec.

Looking forward to hearing what the cure is when it's found.

Kind regards.

[andyg plym]

Ideal thanks, il check for play as mentioned then go from there at the end of the day it's under 90k so you would of thought it would be ok

[dobbin]

wastegate

andy i have same problem with my rs2 1.5 bar holds strong if i change wastegate spring to 1.9 bar spring car boosts over 2 bar i have been chasing this fault for months
i am certain its wastegate faulty will be taking mine off today will let you know how i get on. i have a rs2 fuel pump if u need one as i changed mine thinking it was fuel pump to 040 in tank