Starting to get peeed off now.
Only boosting at .6 bar. Should be more like 1 bar as usual.
Checked everything. It lasted a week then went back to normal for a week. Now it's back .... AGAIN!
I tried taking off the vac pipe to the actuator and it went past the 1 bar mark. Feathering the throttle as to not overboost.
Put the pipe back on and hey presto... 0.6 bar.
I'm thinking actuator nackered!
Any suggestions???

 

I had the same problem last week and the pee was missing in vac pipe then the waste needed adjusting
It is running mint now but that was a v5

 

Ok cool bud.
Tried everything possible. Cleaned out boost solenoid, vac pipes. Checked for leaks and split pipes. There's no smoke or funny noises. Cars a v4 type r. It runs sweet as, apart from the low boost. I had this problem about 5 months back also. Lasted for a week. Then till 2 weeks back it was boosting fine. Pulled like a train. It's starting to get on my **** now lol. Don't know what else to check.

 

hiya mate what fuel you using??

 

I put a manual valve on mine and bypassed the solenoid. If yours boosts past 1 bar with no pipe on then it sounds like your soleniod is not functioning properly. Either refit another or get a manual valve.

 

Using v power and octane booster.
Well I've bought myself a new actuator, so I'll put that on at the weekend, see if that helps!

 

X2 nothing to do with the actuator, common sense really

 

try getting a specialist look at it mate, to much grief you have suffered already....

guessing is expensive

 

Right. So I've put my new actutor on an still only .6 bar.
Done a power probe test on the boost solenoid an that works fine. I'm really stumped now.
Literally can't think of anything else! Tried to run diagnostics an it couldn't read it due to some electrical device in the car!
All I have is an upgraded head unit.
Any more suggestion would be welcomed guys!

 

As I pointed out above its not your actuator, this has to keep the waste gate closed until the desired boost is reached . At the moment you are running actuator pressure so your boost solenoid is where I would be looking.

Even though you have tested it still could be faulty.

 

Ok. Been having a look for boost duty solenoids an I can't find one that matches the one I have in the car at the moment. Could it be the other parts of the boost system?
i.e not the actual 3 port, but the other electrical connectors?
The part numbers I have seen for them end in 12 and 13.
Mine ends in 190, if this is any help.

 

Oh yeah. I fitted an hks filter and stainless induction pipe. That's when the boost went down. After about 20 miles of driving. Still have the orange label maf in so I don't see why this would be the cause.

 

In your first post you mention removing the vac line from the actuator and the boost was rising past 1bar.

This means your boost solenoid is not bleeding of any air off when piped up ,to keep the actuator closed, there fore its opening at the actuator own pressure which is 0.6bar.

Even put a manual boost controller on and you'll see.

I dont know what you are getting at mentioning duty cycles because the way your car is behaving the solenoid is doing nothing.

I have an after market boost controller ,If I turn it OFF the boost is actuator pressure.

Can you swap out a solenoid with someone? Or bring the car to a specialist

 

I have been thinking it is what you say it is.
If I get one that's a different part number to mine, would it still work the same??

 

Don't know anyone else with a Scooby. So I'll just have to buy another.

 

Just buy a solenoid from the same year car as yours mate.Loads of people breaking them.Some of the traders might be able to help you

 

Update.
Now fitted new actuator and different solenoid.
Still .6 bar.
**** knows what to do!

 

You had the car mapped as you have said you've put on a hks and exhaust if u haven't mapped it yet that could be your problem.

 

As said above with the actuator un-plumbed the car makes 1 bar plus so you know the mechanical side of things is fine. The only 2 things it could be is the solenoid or the ECU telling the solenoid to stay closed for what ever reason. ( limp mode because the ECU is not happy with some thing? )

 

do what you should have done from day one, get it to a specialist to be looked at, your just throwing money at parts that are fine.

 

Yeah I will bud.
Just gotta find the time. Powe engineering in Uxbridge any good??

 

I told you it wasnt the actuator mate , if you and to keep asking for advice and not listening plus throwing money away on parts you dont need go ahead.


See post below, probably more helpful lol

 

Also check that your car is not in diagnostic mode. There is black and green plugs under the dash on the drivers side, that should be disconnected , if you find they are connected the car is in diagnostic mode causing the boost only to reach actuator pressure.

Here's is a guiden to stop you going round in circles:

Scroll down to Classic Ecu reset shows a pic of the connectors your looking for.

http://www.scoobypedia.co.uk/index.p...ledge/ECUReset

 

Just put my standard air box back on and it boosts as it should. 1bar. Thinking I should by my mods all at once then re-map. Hopefully that will help.

 

Doesnt really make sense that just refitng the airbox did that