Help Help Is it a vacum leak

[SIMO]

check the vacume pipe thats goin to the actuator from the boost solinoid on the right turret!!

[Bobbys14]

Could be alrite man, is it standard or aftermarket?

Standard actuator on a gt2871r, the car was not started for a year so actuator would have got no use!! Do you know should it be open on idle??

[SIMO]

see can you move the actuator arm goin to the wastegate by hand could be tight from left idle doubt it but try it anyway.

[Bobbys14]

Rite been out at the car for the evenin, i blocked the airfilter pipe and put 2bar of pressure in to the system got a few minor blows tightened clips and that sorted them out no more leaks then started the car and no change at all?????

[colm]

check your waste gate, it shouldnt be open on idle.

[Bobbys14]

check your waste gate, it shouldnt be open on idle.

Its an internal so actuator could be my problem? Tryed to force it closed more when the car running but just wouldn't go!! Would the timing be off on idle? its a reconditioned engine with metal head and s13 inlet sprocket vvl removed! Really getting to me now!

[Bobbys14]

Bit of an update, Defo no leak had 2bar in the system and no leaks,
checked sensor's
removed:
Afm: car cut out
Trottle position: car reved up
o2: no change! should there be a change here?
If i remove a vacume line there no change either!!!

[Bobbys14]

Anyone in meath with diagnostics to check the silvia?

[Bobbys14]

Just an update, martain tracey told me he would put it down to leaking compression on a valve or piston ring, with the engine only rebuilt i was hoping it wasn't and the only thing i tought it could be to do this is the vtc removed is messing with the timing on low rpm so i stuck it back in along with a set of rocker arm stoppers and so far so good vacuum is back good and idling nice at 800-900rpm..

Thanks for the suggestions ppl

Bobby

[Arnie]

Good man, I saw similar problem with s14 in KK, thought it was down to coilpacks (melted) but didn't realize timing can affect running so much.
On that car there was boost when engine was revved up, and huge amount of exhaust gas blowing on idle, just couldn't believe it. It was after h/g job so someone didn't put it back as it should be then.