Unable To Boost

[D LAW 4LT]

Hi I recently bought a xr6t which seems to be a great car so far.I purchased a cappa performance flashtuner for it to get a little more boost out of it as im not into tyre frying stuff just a little more than factory power.With a 10 pound setting with the tuner the car felt exactly the same as stock????I gave cappa a call and was told it was a problem with my car.They said the hose from the cooler could have come off or a split in the hose under the throtle body,then I was told it could be a faulty boost solinoid.

Last but not least it could also be a bad waste gate,has any body heard of these probs or maybe come across them.They said this is why the car wont boost.

Any info will be great.

Thanx DLAW4LT

[ZAP]

Have you checked the intercooler hoses ?

It is a very common problem for them to blow off.

All the other items listed by CAPA are common problems.

I would try the 8psi tune and see if it makes any difference, if it does it could be a bad tune on the 10psi slot.

If you are not used to the power of a stock T, it is possible that the problem has been there since you bought the car. Have you also made sure you have followed the flashing procedure exactly ?

There have not been many reports of problems with the Edit box.

[69ADY]

First off... welcome to the Mayhem mate...

Secondly, try and get your waste gate actuator checked out.. I too had a boost problem.... THERE WAS NONE, actuator was totally stuffed. Replaced it and car was itself again.

Just a thought... good luck

Adrian

[D LAW 4LT]

Thanx for your reply, I dont think its the tuner as I feel the change in the gearbox shifts so somthing is happening just no boost.Where is the cooler hose located?

I also tried the 8psi setting , same thing , no boost.

thanx again

[ZAP]

The Turbo hoses are the big black rubber hoses crossing the engine and around the front to the intercooler.

You will need to check every one. They can look ok, but I would loosent he hose clamps and remove then replace and make sure you slide them on cleanly.

After than make sure the hose clamps are tight. Some hairpray on the inside of the hose will make it stick better.

Make sure you check the 2 pipes going to the intercooler. IF you are not mechanicly inclined, take it to a mechanic and get them to check them.

[D LAW 4LT]

do these coolers have any vacuum lines coming of them,as it sounded he was sayin to check for vacuum lines.Does this sound right?

[Paradoxx]

Ok things to check for...

The turbo... the hose that comes from the bottom of it is the outlet hose which connects to the intercooler. This is normally connected with a spring loaded hose clamp which is useless, you will NEED to replace this with a proper screw in type hose clamp, some suggest the use of 2!

This is the first place to start.

Once you have proven that you can test and tune from there. If you still have a problem then check other things like actuator etc.

[D LAW 4LT]

it still feels like there is boost , just all the same with no matter what setting on the flashtuner.

ill start with the hose fitting and see how I go.

[Paradoxx]

Yopu will still get positive pressure if the hose is partly off... my car is currently in that state now... you can hear the pressure leaking.

[Eugene]

Where to start,

Welcome to the Nut House.

there are several areas for you to look at.

Has the car ever been to ford for service? if it has, there is afair chance the rubber between the "crossover" and throttle body is not installed properly, I have had mine to Ford three times, and each time I have to go home and refit the rubber, in the end I replaced it with Silicon tube, 3 1/4" ID, about 10 buck worth.

Remove the hoses going to the cross over, two on the exhaust side, and the inlert from the air-cleaner, remove the three 10mm nuts that hold it down, Loosen the crossover side hose clamp on the throttle body rubber, remove the boost feed line to the BOV at the passanger side rear (small black hose), now lift and slide to the left the cross over.

remove the factory black bit, replace with 40mm of 3 1/4" id silicon hose, put it on the throttle body first and tighten the clamp , now reverse the above procedure for the refitt of the cross-over, that's the first problem solved.

now remove and replace all of the factor spring hose clamps in the IC tubing run

from turbo to cooler pipe, from the pipe into the cooler, from cooler out to rubber, from rubber to alloy under battery, and from alloy under battery section to the rubber up to cross over.

Second problem solved.

now chack if you have boost.

there is more, but that should keep you going for a while.