Hi All,

I have a 2015 Ford Focus 1.0 Ecoboost, Had the PO299 fault so took out the vacuum pump valve (which had completely degraded) and replaced it, feeling pretty happy with myself (as that is literally the first repair I have ever done on a car) I found the issue isn't fixed.

So now going down the rabbit hole I purchased Forscan and the ran a diagnostic whilst out for a drive, I had the following PIDS

MAP
Desired Boost Pressure
Measured Boost at Throttle Inlet Sensor
and the Wastegate

I am hoping the measured boost one is the correct PID

but it wasn't tracking the Desired Boost pressure that closely, only getting up to 16psi rather than the 20-25psi the desired boost was showing.

Then weirdly the wastegate% stopped about 6 minutes into the drive, and stuck on 15%....

Any ideas what it could be? The car felt reasonably sluggish throughout

Thanks for the help I am a total noobie to this, but determined to learn more about fixing the car 

Check the one way valve hasn't collapsed in the small vac pipe from the vac pipe to the solenoid, in the vac pump outlet.

Hi Dave, That was the first thing I checked actually and it had completely degraded, I replaced that but still having a problem 😞

Sorry, I presumed by the title that "vacuum pump valve" was the wastegate you had changed.

Change the wastegate, the diaphragm can perish

Hi Dave, do you mean one of these?



I have checked the Wastegate with a vacuum pump and it is moving in and out correctly, the wastegate is also moving correctly on the diagnostic

 

Is it definitely a wastegate or is it a variable vane actuator (just askin)?

Unsure about your statement "moving correctly on the diagnostic" if boost pressure is now tracking the demanded value, is there something else going on cos you said it was stuck (not that I know what it is unless it's the brown (?) solenoid which actuates the "wastegate" and, on very old cars, there is an air filter on the end that can block?)?
Sorry if I'm on the wrong track or missing the point...

HI Shearers! Thanks for post, I think the wastegate actually stopped moving when the car went into limp mode. Once I had turned it off and started it again in the morning it seemed fine.

I am not entirely sure which PIDS to show on Forscan but I think

Manifold Absolute Pressure seems to be moving between 2.9 and 17psi? 
Then there is Desired Boost Pressure which seems to be ranging between 14.6 - 27.3

and finally there is 'Measured boost at Throttle Inlet Pressure ranging between - 13.5-17.5

 

Is the Measured Boost PID showing me the 'actual' boost from the turbo, and the Desired is what it should be?

 

It is a wastegate turbo.  Variable vane generally isn't used on petrols as they have a wide enough power band already.

The wastegate will stop moving when in limp mode, it's kept open to prevent engine damage from overboost.

4 hours ago, Rikkstar said:

Is the Measured Boost PID showing me the 'actual' boost from the turbo, and the Desired is what it should be?

I would think so?

So there is a fault causing that code?

https://www.dtcdecode.com/Ford/P0299

• Turbocharger vanes sticking (NOT APPLICABLE)
• Air leak between turbocharger and throttle
• Charge air cooler (CAC) restriction

14 hours ago, Rikkstar said:

Hi Dave, do you mean one of these?



I have checked the Wastegate with a vacuum pump and it is moving in and out correctly, the wastegate is also moving correctly on the diagnostic

 

 

No, that's the actuator.

The wastegate is a large plastic triangle piece on the underside of the turbo, it's got a vac hose running to it, just follow the hose after the actuator hose, the diaphragm can split

1 hour ago, DaveT70 said:

No, that's the actuator.

The wastegate is a large plastic triangle piece on the underside of the turbo, it's got a vac hose running to it, just follow the hose after the actuator hose, the diaphragm can split

The triangle is the bypass valve.  That recirculates clean air back into the intake system to avoid surging.

Genuine Ford Fiesta Focus Fiesta Mondeo 1.0 EcoBoost Air By Valve 1892131 | eBay

 

The wastegate is at the end of the actuator rod, that dumps dirty exhaust the other side of the turbine wheel to reduce the turbine speed.

 

 

 

Ah, OK

Check the bypass valve then, the diaphragm can split