chasdrury Posted February 5, 2007 Report Share Posted February 5, 2007 Hi guys Does anyone know how to clean the MAF sensor on a '94 80 TDi? I think mine may need doing... Also, I have a diesel leak on the injection pump, I need to re seal it with the Bosch seal kit - does anyone know where I can get this kit from, and has anyone had to do it before? Cheers Chaz Link to comment Share on other sites More sharing options...
Rustynuts Posted February 5, 2007 Report Share Posted February 5, 2007 Don't clean the MAF sensor until you have a spare lined up. It can (and probably will) kill it. There's a chance that electrical contact cleaner will do the best job, as it evaporates and doesn't need any mechanical removal. But be careful what type you use as some can affect the plastic housing and dissolve it. Don't know about the seal kit but a Bosch service centre may be your best bet. Link to comment Share on other sites More sharing options...
danksy Posted February 5, 2007 Report Share Posted February 5, 2007 I doubt it will need doing, John Carter and I did them last November at about 158,000 miles Mine's still going strong after notching up 40,000 miles since 208,000 and counting If you have to do it then its quite a straight forward job. Get some isopropyl alchohol (Maplins). Disconnect the maff from the air intake (IIRC there are 3/4 screws holding it in place). You place the whole thing flap side down in a container containing the alcohol (NB keep the electronics and connector out of the solution ) Link to comment Share on other sites More sharing options...
Rustynuts Posted February 5, 2007 Report Share Posted February 5, 2007 Durr, just re read the initial post. As I remember, the Audi 80 uses a hot wire MAF rather than a hot film, and these used to be self cleaning and very reliable. The way they (mafs ) work is that they run a voltage to heat them up. The airflow across them tries to cool the wire or film, and the ECU registers how much more current is needed to keep the temperature and uses this data to determine how much air is being drawn in. With the hot wire type, the ECU heats them up with full voltage occasionally to burn off any contamination, so cleaning isn't necessary. However, if it's a hot film type then my first post is relevant. Link to comment Share on other sites More sharing options...
chasdrury Posted February 5, 2007 Author Report Share Posted February 5, 2007 [ QUOTE ] I doubt it will need doing, John Carter and I did them last November at about 158,000 miles Mine's still going strong after notching up 40,000 miles since 208,000 and counting If you have to do it then its quite a straight forward job. Get some isopropyl alchohol (Maplins). Disconnect the maff from the air intake (IIRC there are 3/4 screws holding it in place). You place the whole thing flap side down in a container containing the alcohol (NB keep the electronics and connector out of the solution ) [/ QUOTE ] Thanks Danksy, don't suppose you know anything about resealing the injector pump that is leaking diesel everywhere do you!? Cheers Chaz Link to comment Share on other sites More sharing options...
danksy Posted February 5, 2007 Report Share Posted February 5, 2007 not a clue mate Link to comment Share on other sites More sharing options...
chasdrury Posted February 5, 2007 Author Report Share Posted February 5, 2007 Argh!! Anyone have any ideas!? Chaz Link to comment Share on other sites More sharing options...
danksy Posted February 6, 2007 Report Share Posted February 6, 2007 When you say leaking diesel everywhere? How big is the leak? It's more likely to be where the fuel lines connect into the injector pump, than the pump itself I don't think the pumps are servicable, so you may need a new one. The knack to runnnig a budget driver is knowing when to ignore a niggle Link to comment Share on other sites More sharing options...
chasdrury Posted February 7, 2007 Author Report Share Posted February 7, 2007 No - the diesel is definately coming straight out of the pump! They are serviceable - it seems to be a common problem with the bosch pumps, most people seen to reckon that they need doing when the car is taken out of regular service... Anyway, seal kit is on its way to me now, will be having a bash at it on the weekend! Will keep you posted! Chaz Link to comment Share on other sites More sharing options...
danksy Posted February 7, 2007 Report Share Posted February 7, 2007 good luck Link to comment Share on other sites More sharing options...
chasdrury Posted February 7, 2007 Author Report Share Posted February 7, 2007 Thanks! I think we are going to need it.... Link to comment Share on other sites More sharing options...
chasdrury Posted February 10, 2007 Author Report Share Posted February 10, 2007 Budget driving at its best!! New Pump close on £1000 +fitting. Recon pump £575 +fitting. Shark's VAG-COM (£0 - thanks Ben), a Bosch seal kit (£8.50), and a good pal doing it with me, and I no longer have a diesel leak!!! Chaz Link to comment Share on other sites More sharing options...
danksy Posted February 11, 2007 Report Share Posted February 11, 2007 Don't suppose you wrote a little guide did you ? How long did it take? Was it straight forward? Why did you need vag com? Link to comment Share on other sites More sharing options...
chasdrury Posted February 11, 2007 Author Report Share Posted February 11, 2007 I have a guide from an American site, for VW diesel pumps... I will adapt it for others certainly. Not really sure abou VAG-COM - the guide said you needed to check the timing becuase lots of the Americans had problems starting the cars after they had taken the pump to pieces. There was a lot of hype on the forum about killing your car etc etc. To be honest I think its bull since it took 2 of us less than half an hour and it couldn't really have been any simpler to do... I don't think VAG-COM is necessary but I borrowed it anyway just in case. I will do a guide though sometime this week. I have ended up with a spare set of seals too if you are interested? Also today we changed the radiator, header tank, PAS belt, alternator belt, and the oil cooler. The car runs like a dream now. Brilliant!!! Chaz Link to comment Share on other sites More sharing options...
danksy Posted February 11, 2007 Report Share Posted February 11, 2007 Well done how long did the rad etc. take? Did you take the whole front of the car off? I am contemplating doing my cambelt soon Link to comment Share on other sites More sharing options...
chasdrury Posted February 11, 2007 Author Report Share Posted February 11, 2007 The radiator is not that difficul to do actually.. When you get the radiator out (about half an hour) you have dead easy access to the PAS and alternator belt. About half and hour to chenge that, the longest part is filling and flushing the radiator with cleaner and running up to temperature! Chaz Link to comment Share on other sites More sharing options...
J_C Posted February 12, 2007 Report Share Posted February 12, 2007 Nice one Chas, well done. I'm really glad that the old girl has been rejuvenated. Enjoy her! Link to comment Share on other sites More sharing options...
chasdrury Posted February 12, 2007 Author Report Share Posted February 12, 2007 I will do John - there is a tiny leak around the engine/gearbox gasket that I noticed today, should be getting that fixed later in the week..... Been driving her tonight, feels like a car that has done 20k not 170k!! Chaz Link to comment Share on other sites More sharing options...
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