FC turbo 2 boost problem

[goggs78]

I have no boost at all, the guage goes up to zero (sometimes just past it) and gives up, it\'s not the guage because there is definete lack of power. I think it\'s a split pipe somewhere unless someone has another possible cause. To make my hunting eaiser, how many pipes are the coming of the turbo? and which ones are likely to fail. Any help will be much appreciated, cheers.

This smiley looked funny so I put it in.

[drutin]

howzit

check your oil level too

the pipes to check would be firstly your intake pipes to the turbo from the airflow meter to the front of turbo they usually crack next to the turbo, because its airflow metered they run crap
then check the rubber hose coming from the outlet of the turbo snail to the plastic or alloy (depending on series ie 4/5) then check the rubber hose on the other side of join to the intercooler

usually the intake pipe is crack or the outlet rubber hose or the pipe to intercooler blows off

hope helps
let know what you find

later
glen

[goggs78]

cool, will hopefully have a look tomorrow, I\'ll let you know.

[goggs78]

Had a bit of a look, not much time to do anything major, checked all the hoses, they seemed fine, then I checked the wastgate arm, which seemed like it wasnt on the pin properly, so I wedged it back into place with a REALLY big screwdriver. not 100% sure if it was out of line enough to cause no boost, but when I get paid I will test drive it and see if it worked (i\'m poor this month). I\'ll keep you posted.

[Brett]

I think its a fairly common fault for the pin to drop out of the waste gate arm - Have a feeling Grinder found his arm hanging off....

[goggs78]

I seem to have more boost now, but I dont think I quite have enough, It goes up to where it says x10 on the guage, is this right?

[goggs78]

pleeeease help

[Prof]

You still having boost issues ?
 
It could be the boost solenoid or the piping leading to it.  There is a hose that joins up with the small pipe that comes off the compressor out side (the vertical pipe coming up from the turbo and going to the intercooler) and goes to the wastegate.  It\'s job is to blead off some of the air to the wastegate, delaying the opening till a higher pressure is reached.
 
If this pipe is blocked or the solenoid is not woking, then the turbo will only make about 5psi before the wastegate opens.  With the boost solenoid working, it should reach 8+. (you will only get top boost in the higher gears - 3rd, 4th and 5th)
 
The solenoid itself is normally located on the oil filler neck unless it\'s been moved.

[goggs78]

Mine goes halfway then stops. sounds like the solenoid is the problem, I think I found it but I\'m not sure, can anyone post a piccie of it and tell me how to test it cheers.

[Prof]

Heres a pic from the service manual.
 
The solenoid is fed with a pulsing signal from the ECU, so a bit difficult to measure with a meter.
 
However, if you disconnect the plug from it, you can measure the resistance of the coil.  It should be about 50 ohms.  If you then apply 12v across it, you should here it \'tick\'.
 
Another test you can do, is to detach the vacuum pipe that comes from the turbo to the solenoid, and block the hose with a bolt or something similar.  Then test drive and see if you make the same boost levels.  If you do, then the solenoid is faulty and not opening.
 
Good luck.:Thumbs-up

[goggs78]

ok, cheers for your help so far, I will try this tomorrow and let you know.

[Brett]

Bear in mind 90% of TII boost guages dont work properly - none of mine ever went beyond the half way point, so you may be making maximum boost and not realise it.  I\'d hook up another guage to be sure.

[goggs78]

the car definetly feels underpowered, either that or I have extreme paranoia!

[goggs78]

neither of the two pipes go to the turbo, they both loop back up and connect into a block with 4 different colour connectors on it.

[goggs78]

I took it out for a run today, it got more boost, but when it got to 3/4s (as high as it went) the boost started droping off. It seems to have good and bad days and I really cant figure out what\'s causing it.