Right peps losing my rag
Right I have a 99v5/6 turbo 2000
When brought car had a cheap nasty manual boost controller plumbed into boost system as well as factory boost solenoid
I plumbed all back to factory and when hitting boost goes to 1.5 then 0.9 it feels like turbo coming in and out even tho foot down
Basically fluctuating
Have fitted another 2 port solenoid and factory pipping with pill in and still the same
So to
Keep it ok had to put manual boost controller back on
But don't want it on car want it bk to factory
Please anyone help

 

For a start your car should never hit 1.5 bar as the fuel cut will happen a lot earlier.
Not much help but you need to take it to a good Subaru specialist so they can actually test it as I would guess that something else has possibly been done to the car and the MBC may have been fitted to cover whatever is going on.

 

Do you Wreckon car car has possibly been mapped in it life as spoke to last own and he hasn't had it mapped

 

Anyone have any input please I love the car to bits but losing love for it slowly

 

Boost spikes? is the car standard? mods such as decat down pipe etc can cause overboost issues.

Ive just removed a k&n induction kit from my my99 2000 which has transformed the power delivery no end... do a search

 

If it was mapped I see no reason to have a MBC on it.

 

Might be over boosting. Check all you hoses and vac pipes especially the one that goes to the waste-gate actuator.

 

Replaced all vac pipes with new stuff and even fitted pill back in correct place
Car has straight through exhaust on dump valve which I fitted due to old one seized
Air filter that's all mods
Car was sitting for 4 years before I had it
Was doing it with standard exhaust
Just getting me down cause I really like car

 

Still got problem and with manual boost controller car feels slow

 

I have similar symptoms I hit 4k sometimes 4.5 5k and it splutters rapidly power comes and goes through all gears

 

Ye it's like the turbo surging

 

Turner did you fix yours

 

Manual boost controller! There is your problem!!!

Do it right connect it back up normal and call a mapper

 

But when putting back to standard piping cars boost is all over place bouncing to 1.5 bk to 0.9 then 1.5 then 0.9 and so on and foot is planted

 

Check the map sensor or try a different one. Make sure someone hasn't put a modification to the wiring to the map sensor to fool the ecu. Check also the wiring to the ecu under the metal plate under passenger carpet hasn't been played with also.

 

Also further to the above. Try disconnecting the battery for a few hours to reset the keep alive memory.

 

Have tried another map sensor boost solenoid map sensor another pipe work with pill
Haven't checked ecu yet
As said when manual boost controller on holds at 0.9 psi but feels really slow
Haven't drive car for nearly 2 months due to this problem
Booked in with Scooby specialist on 28th nut will have a look at ecu tomorrow cheers
Any more help welcome

 

what mods are on the car?

might be worth getting it checked over and mapped for mods if any fitted.

you mention bar and psi in your boost measurements.. is it 15psi or 1.5bar?

 

Sorry 1.5 bar and mods are exhaust with no cats,air filter,dump valve, that's it really

 

Unusual to get that high a boost spike with those mods but it needs mapping really for them if it hasnt already been.

Being a 99 might also be worth replacing the maf sensor as they are very fragile especially with air filter changes

 

Doing exactly the same as my old turbo 2000 did when I got it.

I took it to Powerstation and fitted a new maf a new O2 sensor and mapped it and that fixed it.

It also needed a new clutch, weather this added to it as it was slipping I do not know

 

How much is mapping on my Scooby I have it booked in with cmc developments
Checked ecu and some wires have been messed with think it had gauges fitted
Connected standard pipes up again took it out
And put foot down comes on boost and bang straight round to 1.5 bar and then to 0.9 and keeps flicking between and foot on deck

 

Just a thought I have changed all boost piping to blue silicone pipe work don't no if bigger inside
And I put standard pipe work back on where it fits to actuator and turbo
Do you Wreckon if pipe bigger it will cause boost fault

 

What size restrictor pill have you got in there? You want a 1.2mm. If you go smaller than that then that could be your problem.

 

I couldn't tell you I had the standard pipe work from a Subaru breakers

 

I no the pill I brought off net was 1.0 but then I brought standard pipe work with pill in off Subaru breakers

 

Can I drill the 1.0mm to 1.2mm

 

Yeah with a 1.2mm drill bit. It may be hard to get that size. Maybe a carburetor jet drill bit is available that size.

Edit- you can buy 1.2mm drill bits from eBay easy enough