Dutch24V

Just installing the new MAF and decided to clean the air filter (K&N panel with standard air box) too. Question: As it's a new MAF I don't want to flood it with oil when I first drive with it, so how much of of the K&N air filter oil I should I use and on what side(s) (only the outside-air exposed side I presume?) to spray?? (the instuctions are in Dutch and unfortunately mine isn't that good!) Cheers, Ducth

Just installing the new MAF and decided to clean the air filter (K&N panel with standard air box) too. Question: As it's a new MAF I don't want to flood it with oil when I first drive with it, so how much of of the K&N air filter oil I should I use and on what side(s) (only the outside-air exposed side I presume?) to spray?? (the instuctions are in Dutch and unfortunately mine isn't that good!) Cheers, Ducth

Mat: It is but cheaper than the alternative at present. Most of it is leaking down the outside left hand side and back of the block though and not burning in the combustion chamber. Tommy: I had the same when I replaced mine. Huge difference and so much smoother!! Kev/RW1: Friday evening I put the ECU into basic settings and did what was mentioned above. That evening she drove like a b*tch - stalling everytime I clutched and at every set of lights. Yesterday she was a little better and today she hasn't stalled once. Also, acceleration seems a lot smoother than before and she picks up a lot sharper. Anyhow, I have ordered a new MAF today from Bosch. 229 euro excl.. which is just a tad better than the 335 euro excl. VW want. It's also a swap job as you mentioned. Should get it Wednesday. Can't wait to feel full power again!! Dutch

That is correct. Have had these compression readings for over a year now, but haven't checked them recently to be honest. As you say, the VR is a pretty resiliant lump when iffy. I drive +/- 100 km per day with a fairly heavy right foot and she still keeps going!! ...Using about 5 ltrs of oil (15w 40) every 3000km's or so though but coolant remains good with no leaks so far.

Sorry, I didn't mean PSI then! The other 4 cylinders read between 11.9 - 12.6, so 2 and 6 are very low compared to them. Not sure what unit it was then - BAR maybe?? When I do the basic settings bit I presume the water temp should be something like 70 or above?? Dutch

That's what I was thinking but nice to have it confirmed. I did a VAG-COM scan and it came back with zero erros. Also checked the throttle angle and it was moving up in nice small, smooth steps. Initial angle with no acceleration is 11.6? Haven't done the basic settings bit yet but might try it later this evening for a laugh. ...one other thing leading on from the overrun Q. I have low compression on 2 (+/- 7 psi) and 6 (+/- 9 psi) and know the HG is on it's way out. Sometimes she emits a little puff of white smoke when cold too, but only when on throttle, not it would seem on overrun. Does this vaguelly point to possible valve stem and/or piston ring wear also?? The head is coming of possibly next month but need to make sure I have enough cash in the bank before braving such a job!!

OK, thanks for the tip. One question though, stupid maybe but..., what do you mean by 'on the overrun'? Heard this phrase several times just not sure exactly what it's refering to!?

Unfortunately so true!! I have already sourced my own bolts as couldn't be bothered trying to explain again to dim-wit sitting behind the VW desk!! To be honest I didn't actually reset my ECU after replacing as just presumed it was a plug'n'play part. Will it make any difference then to the running then or is the reset just to check the angle is correct?? I lined up the litlle cross hair thingy with the sensor in the correct place so guess it should be fine. What if it isn't?? Will order a new MAF tonight then, from Bosch!! Again, thanks for all the advice Kev...

Thanks for comfirming that Kev. There is a Bosch dealer almost next door to my local VW dealer as it goes, but..., do I have to take the inards out of my existing MAF first and swap them at the bosch dealer, or send of my complete MAF and wait for them to send it back with new inards?? Reason being I can't be without the car for any time as it's my daily driver! BTW: When I ordered the TPS I specifically told VW to order the correct bolts as the new TPS is smaller than the original, as you had warnned me. Guess what, it still arrived with the original, now far to long bolts!! F*#@ing muppets...

Replaced the TPS yesterday and no difference, except the car doesn't stall now when I unplug the MAF!! It still drops out sometimes at lights though, or when clutching in heavy traffic etc. I'm going to order a new MAF as mine is still the original (190000+ km's now) so geuss it needs replacing anyway? Unfortunately it's the 461 version so must pay 335 Euro plus vat from VW, unless someone know otherwise?? I also received my Ross-Tech VAG-COM lead today so will run a diagnostics test on the 60km journey home and see what comes up. I have already replaced the following in the last year to no avail: ISV Crank sensor 1 cam sensor (must do the other still - I presume there are 2?) Coil Pack Plugs HT Leads ...and checked intake/all pipe work for air leaks etc. I'm also thinking the frequency valve on my carbon canister could be the culprit if it's stuck open, but guess the VAG scan will tell me for sure. Anyone have any other ideas as I'm running out ?? She drives perfectly apart from the intermittent stalling and has (well, seems to have anyway) full power throughout the rev range. Although I did notice yesterday at low revs she hesitates until the revs get above 2.5 - 3k. I'm sure a new MAF will solve it but maybe I'm missing something?? Cheers... Dutch '94 VR

OK, noted and will mention it when ordering the new one. Cheers...

...have been thinking about this and have come to the conclusion that my TPS is dead, or rather dieing! Just unplugged it and no more stalling - obviously it takes alot longer for the revs to drop but they never drop out completely. So, plugged it back in and unplgged the MAF and she died instantly. I have heard before that later VR6's do not stall when the MAF is unplugged and seem to remember years ago trying to diagnose another problem and when I unplugged the MAF I vaguelly remeber she didn't die. Will purchase a new TPS tomorrow from VW and post back in a couple of days with the result. Dutch '94 VR

...can't find the sticker without removing ecu, which I won't do as couldn't figure how too quickly! I presume it has AG as it's final code as I don't have a factory fitted imob.? Anyway, it's probable that VW were correct in telling me to go for the 461 maf then judging from the previous posts from yourselfs? Is this maf used in any other vw model or will I have to stump up the 335 euro plus vat Corrado price??

OBD

err, I tried this yesterday on my '94 CP VR and she spluttered and died. I had only just started her though and she was stone cold!?

OK, will check this evening and post back...

Err, no idea to be honest. Is there a sticker on it that will tell me??

I have a question about the different types of MAF sensor in the Corrado VR6. Fisrtly, I have a '94 VR with a coil pack. I have just spoken to VW and they have told me the following: My car, based on chassis number, was manufactured on 31st March '94. It requires a MAF sensor with part number 021 906 461. This is because the last 4 digits of my chassis number are before 0015, which is when they changed to the newer?/different? MAF apparently? However, after reading through the following post: http://the-corrado.net/.archive/forum/viewtopic. ... hlight=maf ...I would have thought I would need a MAF with part number 021 906 462 or 021 906 462A, as I asume that 461 is the first incarnation and 462 the second etc, and as a '94 VR with coil pack is the last incarnation of the VR in a Corrado presumed I would need the last incarnation of the MAF to match???? It is possible to swap the insides from a 461 to a 462 and vice-versa so guess I can't go wrong if I buy the cheaper 462?? (GSF sell the 462A's for 70 quid, where my local VW want 335 Euro plus vat for a 461!!) Also, is it true that an 'A' after an official VW part number means it's official but recon.?? Dutch, '94 VR