blueovalboy500

Hi.
Hope someone can help me. Please.

I bought a 07 plate focus st225 last December and it was running excellent. It is standard with a decat already fitted when bought.
The last month it has got very flat and unresponsive. I took it to a rolling road who suggested I change the 3 sensors. MAP,MAF AND BCS.
I also had it serviced and did a smoke test as the rolling road guy said I could have a leak somewhere. No leak found. Still running the same after all the new sensors.
Could it be the actuator?
What do you suggest I do next?
CheeRS

Dal_

iTrader: (2)

Would you say that it's not boosting correctly and has got gradually worse? Does it make it to 1/2 boost on the gauge? (perhaps a bit more with a decat)
If not then it's likely to be your boost solenoid that's given up the ghost. About £40-£50 from Ford and a 15 min fit

blueovalboy500

Thanks for the reply Dal. Yeah everything you say is what its doing but i changed the MAF, MAP and BCS which i beleiove stands for the Boost Control Solenoid last week.
I see you mentioned Boost Solenoid. Is this different to what i have mentioned above?

CheeRS

Dal_

iTrader: (2)

Ah, no - sorry my mistake.

Might want to check the symposer tube as apparently that has a diaphragm in it that can fail which causes similar symptoms to the BCS going. (Some people blank theirs off to avoid the problem)
You've not got a whistle / noise like a bearing gone on a water pump have you?

blueovalboy500

Thanks for the reply Dal.
My mate in Ford's did a smoke test and there was no leak anywhere which i thought i had.
Wouldnt that have picked up the Symposer pipe if it was split?

Im on the verge of maybe contacting scc and getting it in and looked at but its a long way for me and i need the car everyday.

blueovalboy500

I do have a noise but its the aux pulley thats making it and not the alternator as previously thought.
It varies with the engine rev's.