Originally Posted by cong

any ecu fault codes show up when u connected the plugs to clean the boost seleonoid

Originally Posted by greasemonkey

The archetypal "hesitation" problem with the MY00 cars only affected the regular AE802/782 ECU, not the PPP one, so whatever's going on with yours is something else. - okay GM noted - I definitely have the PPP STI labelled ECU


This could be causing overboost. Do you have a boost gauge fitted to check this? - I don't as yet have a boost gauge fitted cos I have an AFR and Boost gaueg to be mounted in a A-Pillar within the next 10 days or so - I think I will temp plumb in the Boost gauge to see whats going on.


Top mark? You mean the top hole or the notch, and hot or cold engine? Did you also change the filter (and if so did you count the amount of oil you pre-filled it with as part of the 4.5 litres)?

Yep the top mark when its cold. Yes I filled the filter and included that as part of the 4.5 litres - when shes cold she is dead on the top mark.


You mean IFR6D's? Did you gap them correctly (0.7-0.8mm)?

Well when I bought my plugs it did state that they do not regapping ? To be fair I didn't check them as I thought they would have automaticllay been done.

How long ago was the downpipe fitted?
D/P has been fitted for a couple of weeks service and BB done last week. When I first had d/p fitted it did seem to be better but I seem to recall that the car felt like it had a slight bit more lag ? Having read previous posts I did do an ECU reset and the car was better.

Can you describe the noise? Again, do you have a boost gauge to quantify whether the boost pressure really has dropped? Well it just sounds like there is a lot more noise coming from the engine - sort of like its doing more work than it should be at the certain rev point. It is difficult to explain cos the Vortex makes quite a racket...lets just say that the car sounds as though it is under full load when I half depress the throttle. As I say the car picks up from 0-2rpm no problem but the throttle feels wrong from about 2.5krpm upwards. The boost comes in at around 2.8rpm and as I have previously mentioned it just doesn't feel right...I guess the boost gauge should give me a bit more to go on. It seems I have to depress the throttle a lot further to get the car to move.


Eh? You mean Test Mode (connecting the green plugs together)?
Yes test mode

Something funny there, should stop cycling as soon as you turn the ignition off.
yes what I thought too - very odd indeed - I used brake cleaner cos my understanding was that this stuff evaporates out.

Unlikely, if it clicks as it should when in test mode. Depending on what you meant by the "top mark" on the dipstick, it could still be oil getting into the solenoid.
Well the car did a very similar thing the last time I had the oil changed by a dealer. They filled it up to 4.5 litres as per my request and for weeks the car felt a slightly hesitant. I do remember cleaning all the pipework /solenoid etc and it seemed to clear.



You haven't told us exactly what type you used. Assuming they're IFR6D's they should be alright.
Sorry they are NGK Iriduims - Platinums were in it before with no problems. These plugs are NGK Iridium BKR6EIX - they did show as being the correct plugs for the Scoob ?


It's unlikely to be the restrictor, but there's nothing to lose by spraying some brake cleaner down it. MAP sensor, unlikely. Noted

As mentioned above there are a number of potential causes for this problem, but the likeliest one is an overfill of oil getting up into the boost solenoid.