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Egr insufficient flow

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Jord, Jan 6, 2013.

  1. Jord
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    Jord Member

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    Hello people
    having problem with the motor, before anyone says I've searched and searched the forums for help, helped a little but still can't pin point it
    basically I've had my engine management light on for ages, had it scanned which identified that 3 glow plugs were out dead, anti shudder valve teeth were broke
    so I replaced the glow plugs and anti shudder whilst replacing my leaking radiator
    Whilst there I cleaned out egr valve that wasn't too bad choked up, also sorted intercooler pipe seals from leaking
    turned engine on still engine management light on, scanned it, and cleared fault, lasted about 20mins, light back on, Egr Insufficient Flow
    checked all pipes and joints look ok, I've left it until now, the car was driving great good mpg and no turbo limp, until the other day on motorway, turbo limped out,
    then the otherday I took it on motorway again still with good mpg, I floored it through the gears giving it a good blast and was absolutly fine, but still showing same fault
    I inspected the vac pipe on egr and noticed abit of oil around the connection, is this normal or is this a sign of diaphragm split?
    The weird thing is the car is driving fine
    any help would be great
    thanks
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  2. NHN
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    NHN Modmetractor Site Sponsor

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    Assuming its a BKD 2.0 tdi, check the other part of the egr system, the egr cooler/valve at rear top left of engine, its got a spring valve as such, so its maybe stuck, you can work it back/forth by hand & you may need to move the maf piping aside to get behind there if you have big hands/arms.
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  3. Jord
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    Jord Member

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    Yeah sorry forgot to state it was the dreaded bkd, is it attatched to the egr cooler or the turbo? Is the accuator that your talking about?
    Also forgot the add I stucked through the vac pipe on egr and there was no vaccuum but this was when the engine was off, I am right in thinking if I have it running and suck through it, it should stall the engine?
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  4. NHN
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    Yeah its part of cooler & yes actuator, the word escaped me earlier lmfao.

    Stall the engine, unless the solenoid for this inside the solenoid valve block has some connection with others to cause this, I'm surprised it would do this, but I'm happy to learn if it does.

    has the valve block connector popped of as that has 6 pipes going to it & if thats of, its a major issue.
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  5. Jord
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    Jord Member

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    thanks
    no i hasnt done it, but i read on another forum about this problem and someone said it would stall it if blow through it when idling?
    i will check everything youve said either today or tomorrow and report back ha, just baffles me that im getting really good mpg but constant engine management light saying insuffient flow :think:
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  6. Rick @ Unicorn Motor Dev.
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    Rick @ Unicorn Motor Dev. Member Site Sponsor

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    Hi Jord,

    very likely that the EGR valve isn't moving how it should, when it should. Common issue. The best solution is to get it blocked off and mapped out. The car will be smoother and more reliable.

    Rick
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  7. Jord
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    Jord Member

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    I would love to do it, but I've decided to put it up for sale, just want it running good to get decent money for it, looking at a4 avant b8 so that will be getting some mods ha
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  8. Jord
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    Jord Member

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    Finally managed to check it today, the accuator is free and moving fine? Does it sound like egr valve?
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  9. NHN
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    If its where I advised, then yes if it moves freely, then it would appear to be working, but of course this is controlled via other systems to open/shut it.

    EGR itself is dead center front & has a plunger type internal valve on the bkd anyway.
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  10. Jord
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    Jord Member

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    Yeah followed your advise, cheers
    the anti shudder valve is brand new, I did clean the egr valve when fitted anti shudder and seemed free on the plunger, could it be the diaphragm inside split possibly?
    I know I'm asking loads of questions just dot wanna fork out on parts that are working, I'm hoping to put car up for sale once sorted
    thanks for advice and help, much appreciated 😃
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  11. NHN
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    If those 2 parts are working, then next port of call from my knowledge would be the solenoid valve block & associated piping that supplies the egr etc.
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  12. Rom
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    Rom Member

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    Had the same on mine a while back.
    My egr was stuck open, but still gave flow code.

    I ran it for a while, as stuck open is in theory like an egr delete. But took being winter, took longer to warm up, and mpg suffered.

    Got a new OEM egr from euro for £70.

    I may have deleted it, but the mapping it out part is beyond my budget atm.
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  13. Cyrix
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    Cyrix Member

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    Pull the vaccum line off the egr, stick another bit of tubing on this and suck, if you can feel resistance the diaphragm is alright and the plunger is moving as you already verified when you cleaned it. If you feel no resistance then it's split.
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  14. Jord
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    Jord Member

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    tried it, diaphragm has split, thanks for the advice everyone 👍😃
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