Wastegates 90 Hp Model

[Guest SHELLMAST1]

Hi all my problem started in oct03 at 3000rpm engin going into limp home mode ford at last have found the fault after 5 attemps the wastegate is not closeing thay want to change the turbo but am i correct in thinking the wastegate is a seperet pieses on the 90hp models please help

 

 

fitted price by the way south east ford price for turbo

[seatkid]

am i correct in thinking the wastegate is a seperet pieses on the 90hp models

Dont know, possibly.

 

Did they say they what they have eliminated before concluding its a turbo fault?

On the previous 4 attempts what was their conclusion? Was something else changed? Was the fault intermittent or solid i.e. does it always go into limp home mode after 3000 rpm?

 

 

The wastegate is closed by vacuum via the WCS (Wastegate Control Solenoid) which is activated by the PCM (Engine ECU). It could be that vacuum isn't getting to close the wastegate because:-

 

1) Leaks in the vacuum pipes pre or post WCS solenoid. Pre-solenoid are a host of possibilies as the vacuum is also used by brake servo. Leaks from cracked vacuum pipes are fairly common. Check these pipes.

 

2) Faulty WCS solenoid - this can be changed as a separate item. You could check with a meter if the coil was open circuit which is one possible failure on this bit. Using a meter see if the WCS solenoid is getting voltage at idle to low revs (i.e. the solenoid should open and allow vacuum to close the wastegate).

 

3) Wiring fault e.g. no voltage to the WCS from the PCM

 

4) PCM fault

 

5) Vacuum pump faulty - (but the brakes would suffer badly)

 

6) Boost pressure sensor or other sensor fault.

[Guest SHELLMAST1]

First time changed maf 2/ time changed boost presure selinode 3/ time changed vacume pipes 4/ time said nothing wrong with car / went to another ford dealer thay went out in it coupled to computer all sensers working ok wastegate not closing showing over boost on engine so it goes into limp home mode swich off and it resets but go over 3000rpm up hill and it trips

[seatkid]

Over boost on engine is wastgate not opening.

 

Did they measure over boost from the cars sensor or using an independant gauge? Possibilty that boost sensor is faulty.

 

Could still be a wiring fault or PCM fault (giving permanent voltage to WCS and so permanent vacuum to wastegate actuator)

 

If the dealer has diagnosed it as a sticking wastgate then get them to agree that if changing the turbo doesn't clear the fault then they foot the bill. If you go elsewhere they will just say tough luck.