(20-07-2014, 09:31 PM)Poodle Wrote: Injectors could make a difference to power, but not enough that i'd expect you to feel it. More likely the maf has gone, try running with it unplugged and see if theres a difference.

Boost gauge feed also feeds the wastegate actuator, so when the pipe came off you would have been running with the wastegate held shut and over-boosting.

(20-07-2014, 09:53 PM)Toms306 Wrote: If theres no difference with the MAF unplugged then it's broken...

(21-07-2014, 05:37 AM)Poodle Wrote: Not if it's broken, no lol. You just did try it, that was the whole point of the exercise.

Basically, if the ecu isn't getting maf readings that are close to what it expects, then it resorts to a set of "safe" default values, ie low values which will make sure the car doesn't smoke, but also make it feel down on power. Unplugging the maf forces the ecu to resort to these default values, so if there's no difference between maf plugged in and maf unplugged then the maf is dead and needs replacing to restore power and economy.

Do you have one of those stupid K&N style filters? They're known for killing mafs.

(21-07-2014, 12:35 PM)Poodle Wrote: Proper siemens vdo maf is about £70 new from euros, wouldnt bother with second hand unless its a known-good and low mileage one and pattern parts aren't worth the chinese newspaper they're made out of as a rule.

Did you take the cold air feed off yourself? If so that will have knocked the power back a touch once the engine is warm, wont have made a difference to the maf though.

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Theres some people say you can sort them for a while with a spray of electrical cleaner or similar, probably worth a try before shelling out.

(21-07-2014, 06:16 PM)C.A.R. Wrote: Haha love it, Dukes of Hazard horn. I want one.

The MAF is a dud by the sounds of it, only buy Chinese if it comes with a warranty, otherwise buy genuine. Great advice from Poodle, it's just not worth buying 2nd hand unless you don't have any money, as chances are it won't work!

(21-07-2014, 10:09 PM)Poodle Wrote: There's a part number kicking about somewhere, you should be able to find it on servicebox pretty easily. Most of the 2.0 8v hdi engines use the same maf, certainly the bosch-managed systems.

(23-07-2014, 02:06 PM)Poodle Wrote: Bargain! Well the money you've saved there can go on a new maf. :p Try cp4l, its euros but with discount already applied, should be a fair bit cheaper.