last sunday i took the scoob to a rolling road on the way there it did not seem to be boosting as it normaly doe's 15.5psi just seemed down a bit.

had a run and came out 265bhp-252lbft

then monday it had dropped again to 10 psi ?

went and saw Mr.Darley who had a look and replaced the main pipe work from the intercooler to inlet manifold and from intercoooler to dumpvalve!

took the scoob out and it was all back to normal if mot better

fine tuesday,& wednesday!

thursday night dropped back down to 10psi?

car spec my98 uk, full de-cat,dawe's device.

i know it aint the pipe's as there new thank's to p20spd

help?

 

 

 

some one must know

 

Is there a leak somewhere near the dump valve?. I'm not sure but it could be somewhere around there

 

yer thats what i thaught

but Mr.D replaced the pipe from the intercooler to dump valve and the main 1 from the intercooler to inlet manifold on monday night and it solved it but now it's back again?

scoobymods

 

bump

 

where are u based
i have heard that they is a garage on endike lane in hull that knows a little about cars
he likes the slow 1s
as his car has 310 bhp i have heard !!!!!!!!!!

 

right had it down to a garage today for Bj to look at.

checked all the pipe work and it's all fine

sprayed the full engine with bake cleaner to check for leaks and nothing, swapped dump valve's and still the same.

idea's? turbo blade's???



help please



scoobymods

 

idea's please?

 

anyone else?

 

Try taking the dawes off and cleaning it out and check the small bleed hole on the dawes elbow is not blocked mine did funny things once and it was small bits of dirt in the dawes .

Mark

 

have stripped the dawes down and cleaned it out

 

bttt

 

lmfao

 

Looks like iits going to be a hard one to solve mate..


You no were i am if you need a spanner or two.

 

thanks trickie i got all the gear to do the job if only i knew what job i had to do?

 

right then ??

ok it look's like its the turbo actuator that's gone.

removed dawe's device and replaced standard boost solenoid.

still 10psi on road test.

took the actuator off and had a look at it, then replaced it and took the car out again.
still only 10 psi boost.

disconected the pipe to the actuator and 25psi which is great for me but not for the car

so it looks like the actuator is not closing fully and letting boost escape.

took the heat sheild off again and adjusted the actuator rod to fully in as far as it would go and still only 10 psi boost?

Mr.D said to try and connect the turbo housing direct to the actuator with a single pipe with the boost solenoid disconnected but still on the road 10 psi

also reset the ECU but no joy.

so need another actuator for a TD04 if ya have one hiden in ya garage any where let me know.

 

bttt

 

bttt

 

up

 

If you get 10 psi with a direct connection and 25 disconnected then the Dawes should be able to control the boost ok as it is effectively disconnecting the wastegate supply until target boost is achieved, then supplying just enough to maintain boost.
If you can get a low pressure airline you can check your actuator on the car, it should start to open smoothly around 8-10 psi and be full open by 12psi.
It is not uncommon for Dawes valves to need cleaned out a few times, especially if pipework has been disturbed. Try blowing through it, when blowing in the bottom (straight conn) there should be zero flow if it is seating correctly.

Andy

 

Andy i have removed the dawe's device and gone back to standard boost soleniod,
and now im getting fuel cut in every gear its boosting to between 18-20 psi.

ya may remember me i came up with adam (new boy) when he had his apexi power fc fitted and mapped

any more advice m8?