Hello everyone,

I have strange problem with my car. It boost only about 0.3 bar but if you try to accelerate few times "unlock the car" it will get full boost and problem disappear until I turn off the car. For example I turn on the car, have no boost but try to accelerate few times then have boost and I can drive it for an hour without any problem. Then I stop the car, turn it off then turn on and problem appear again. It's really strange and it looks like electronic problem. I changed boost selenoid and there is no difference. I also changed MAF because of check engine and esp but I suppose it was different problem in the same time. Now I don't have any errors on computer. Hoses are ok. I spend few hours with my mechanic but only idea is to update software in the car in Ford service (I have stock ST). Any ideas?

 

The most common problem is that your boost solenoid is acting up.

 

I tested my car on four different boost selenoids (mine stock, other stock, new one which I have now and another one) so it's not the cause of the problem...