Hey guys,

let me start from the begining.....

My dad has a Type ra we have just fitted a new gear box and diff with DCCD which works perfect.

But now when the car goes to hit full boost you hit your head on the wind screen. I have read a few topics on here that say to cheeck the maf the maf is fine. All the sensors are working fine ( apexi fc ) shows all is in line.

The only change that has been made to the wiring on installation of the DCCD is a wire into the signal of the TPS which i have disconected to see if that was it and it was still the same.

would be greatful infact very greatful for advice.

Thanks in advance!!

regards

 

car is mapped for a little under 1.3 bar but its not getting any where near that, Also the knock sensor isnt rising above 23.

 

any one???

 

bump

 

please help guys

 

bump??

 

Any body willing to help? I can't beleive with all the members on here no one has replied!! Come on please guys needs sorting today!!!!

 

sounds like it is hitting the fuel/boost cut, you say mapped for under 1.3, has it only done this since fitting the g/box,do you have anyway of adjusting the boost say to run it on actuator pressure?

 

have u checked the intercooler gasket isnt leaking as i had the same on my ra and it was solved after sorting out a new gasket

 

yes only since gear box has been fitted, Put a new maf on it still the same. There is a dawes devise which i have turned down a turn and a half. still the same. Also there is an apexi fc on the car.


The car has a FMIC i have had all pipes that have input with boost off and checked.


thanks for the help guys keep it coming tho please this is critical regards

 

You sound like you've got yourself into a bit of a mess that, frankly, we are going to be struggling to diagnose remotely simply due to the number of modifications here that may or may not be interfering with one another.

Looking down the thread it seems the car has an Apexi PowerFC and a Dawes Device? Why does it have a Dawes when it has a mappable ECU??? Are you trying to run more boost than the car is mapped for? If so, why haven't you just had the map tweaked? Have you tried removing the Dawes and allowing the ECU to control boost itself again?

It also has an FMIC, is the car actually mapped for it?

You also say when installing the DCCD gearbox, you have wired into the TPS? If this car is an STi Type RA it should most likely have had a DCCD box in the first place. If it didn't, and the new box is an upgrade, then it's a WRX Type RA? Or have you simply wired in a Neetronics (etc) diff controller to replace an OE one?

If this issue is "critical" then the quickest way for you to diagnose this problem is almost certainly to put it in front of a good Subaru specialist with experience of the engine management you're running. As things stand there are far too many unknown unknowns here for us to help you in a meaningful way.

The obvious thing that comes to mind, if this problem started happening only after changing the gearbox, is that the neutral position switch is either disconnected or duff, or you have fitted a recent newage 6MT box with a switch that functions the opposite way (1 in gear rather than 1 in neutral). However, there's about as much chance of that guess being correct as there is of me finding the needle in this here haystack.

If you want this sorted quick, the internet isn't where it's going to happen.

 

Cheers split pin!! I have read many a post on here and you are a guru in the subaru world. The Jolly Green monster fitted the dawes device and mapped it and the its been to api for mapping.

I never thought the nutrul switch would cause this problem, it is the only thing that has changed on the car that didnt come of to do with the original wiring.

The ecu for the dccd is a dccdpro from the states. as a stand alone system but uses a gforce meter and a signal of the TPS.

Would it be possible to have you number Splitpin? As some one with your knowlage on these things would be priceless.

If the nutrul sensor on the gear box fixes this i will buy you a drink!!

Regards

 

No drinks necessary as I doubt it will be that simple. If Simon or David have first hand knowledge of the car then they would be the people to call. It sounds counter-logical to find a manual boost controller on a car with a mappable ECU - but there will probably be a legitimate reason if either or both of the above have had their hands on it, so you should in the first instance speak to them as they know more than any of us on here.

The NPS is nothing more than an educated guess based on what you've told us. It could be that you've not reassembled the car properly after changing the box, or it could be something on the box itself. If it's the box itself, the neutral switch is the obvious thing to check and rule out.

 

Nothing to do with the NPS, mine is currently waiting for exactly this and it's running very badly, as it can't tell when it's in neutral, so it stalls...

( If no one is looking, she's off like a scalded rat, except for a CEL and extra-ordinarily average fuel consumption )

HTH

dunx

P.S. sounds like boost cut to me, check every single hose !

 

You're on an OE newage ECU aren't you? The reason why I raised it as a possibility to rule out is the opposite of your scenario - ECU thinks car is in neutral when in fact it's being driven hard. Although I haven't the foggiest idea what, if any, use the Apexis make of the NPS.

Agreed - although if a Dawes is controlling boost, there's very little opportunity for hoses to be dislodged or damaged given that there should only be two short pieces. Unless there's some sort of hybrid setup, in which Simon or APi will know more about it than any of us here.

 

Well bit more info for you...


The nps has been changed and the caris now fixed. Thank you kindly split pin!!!

Your knowlage is awsome!!!

pm me your pay pal addy i will send some money over for you

regards

 

No need - this is how the forum works, but thanks for the offer. Good to hear it was something so simple.

 

Thanks everyone out at loton park tomorrow get to try out the new dccd and LSD
Splitpin your a legend thanks m

 

You da man splitpin, once again another mystery solved.

 

Thats the second time I have seen someone mistake that for thumbs up

 

Oh well a double slice of humble pie here....

NPS damn them , mine's awful, and no sign of help till next weekend

dunx

 

Now you know why i get trell to do the typing for me , i type like a duck in hand cuffs , all the best with your car Dunx , these cars seem to take you on an emotional roller coaster but when they are going well its fantastic.