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2008 1.6 TDCi DPF/MAF/Turbo

couton
couton
in Ford Focus Club

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Hello All!

My first post here, and my first post on a car forum for a long time! I'm hoping somebody would be able to help me with some issues I'm having with my Focus.

Time for a short story! Turbo went, appeared to be back pressure from the DPF. Cleaned DPF and that was better, but turbo was past its life and passing alot of oil. Replaced turbo, seemed much better. EGR was also blanked off.

Forward on a year and the performance isnt quite so good still, and DPF still doesnt seem right. Identified the MAF was showing 30g/sec at idle - replaced with a Pierburg MAF and now I get 10g/sec at idle. Seems much better! Also noticed the turbo didnt hold its boost (MAP was constantly changing). Identified VGT Actuator Solenoid needed replacing - success, boost now holds steady!

So, I have noticed that other people on forscan reference around 5g/sec at idle - so I am wondering still if thats too high, or perhaps this is just a side effect of the EGR being blanked? I'm thinking of removing the blank to see what I get.

Pending that, has anybody seen the same as this? I'm also starting to wonder whether running for a year with still an incorrect MAF reading hasnt helped this turbo in terms of back pressure.

Many thanks,
Paul

  • Quote
    • 4 months later...


    • Author

    Update on my issues!

    After some research it seemed that idling of the 1.6 TDCi should be around 5.5g/sec of air being consumed with the engine warm - I was almost double this with the EGR blank in place so removed that and idle readings when warm was down to the correct value of 5.5g/sec so it appeared much better, and was much nicer to drive.

    So, you'd think that would be the end of the story! It seems not, P0490 (EGR Control Circuit High), P024F (EGR Control Stuck Closed), and P1412 (EGR Valve Frozen).

    I replaced what was a Valeo EGR with a new Valeo valve (700444). Reset the EGR valve adaptions with Forscan, but still saw the codes. I've replaced it again this weekend with an original Ford EGR valve (2002309). It seems "happier" in that the codes dont appear quite so often with this valve.

    I'm wondering if its worth seeing if Ford will do a PCM update, or if that will just be very painful for me!?

    Thanks,
    Paul

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    • Like 1

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