Well, its not the MAF I guess... WTF? Techies?

devonutopia · 09-08-2004, 21:37

Hi - changed the complete top of my airbox / MAF assembly tonight, and the car is still losing power after just a couple of minutes of starting up!

Now I'm running with a working MAF too! GRRRR!

What the hell else could this problem with irregular/no boost be? The last time I had something "similar" it was time for a new turbo!

I damn well hope its not this again, because the symptoms aren't quite the same really. When the power disappears, and my foots on the floor there seems to be an extra "hiss" from under the bonnet - like the turbo when it spins up, except perhaps its not! So, what could this be? I can see myself having to pay another £30 to my local dealer just to plug my car back into VAG COM!

ScoobyChris · 09-08-2004, 22:32

Jason, may sound obvious, but before you shell out 30 quid, you made sure all the hoses are on tightly and that none of them have split?

Chris

devonutopia · 09-08-2004, 22:54

hoses on the MAF? There was another hose which was attached to the MAF/airbox - behind the box, not part of the electrical - I'll check this is OK but it went off and back on the airbox OK, and securely.

What other hoses are there? I'll have to have a good rummage around, but I don't see why there should be power when I first start the car, I get full 154bhp for about 2 or 3 minutes, then something kills all power - gotta be a sensor of some sort - only thing that could just switch off the power like that - killing the ignition and restarting the car brings back the power... for a very short length of time!

Is there a "turbo" sensor as such, because this was replaced on my last car too - and if I can find it I may swap that too!

ScoobyChris · 09-08-2004, 23:03

Was thinking more of hoses to and from intercooler and around the turbo - things which could be affecting boost. From what you described, it sounds a bit too intermittent to be anything like that............ maybe a VAG-COM session will point you in the right direction

Chris

devonutopia · 10-08-2004, 08:52

Hi - got a new symptom that became apparent as I tractored into work today, slow as always!

Basically in all gears, at around 2000RPM, the engine will suddenly make a noise similar to that of a diesel at start-up (which sounds quite nasty when its running quiet normally) It sounds like its struggling to turn over, or overfuelling, because this sudden tractorish noise is followed by mega amounts of black smoke out the back!

This noise only lasts about one second, but it might give a clue - seems the fuelling is all to ****!

Is there another sensor that could cause this?

fen_l&k · 10-08-2004, 09:00

Jason,

Double check all of the electrical connections too. If you were getting an intermittent connection on, say, the MAF sensor wire, you could get a similar problem to a dodgy MAF.

It sounds like a load of fuel was dumped into the engine - hence the smoke. If all else fails, get it to a dealer, Jason - I know its 30 quid, but could turn out a *lot* more expensive.

Cheers,

devonutopia · 10-08-2004, 09:06

Howard - I'd be suspicious of this if it wasn't intermittent. There's always boost on startup - then it just dies and all these overfuelling symptoms occur...

Gonna find a garage with vag com today.

Chavyboy · 10-08-2004, 09:12

J, are you sure the MAF you bought hasn't been damaged in the post ?

Dougal · 10-08-2004, 09:19

Are the cambelt, tensioner & waterpump OK?

Just a thought

devonutopia · 10-08-2004, 09:43

cambelt etc should be fine, as the car drives really well, as it should, when first started up. And I am using the original MAF out of my wrecked Fabia, so should be fine. Is there something that needs resetting when swapping MAFs? I didn't think so. I'm gonna have to go to my dealer today I think - A local private VW/Audi place wanted £41 just to plug me in to their vag com!

devonutopia · 10-08-2004, 10:20

Booked into my dealers for 16.15 today, so hope their VAG COM will throw up whats wrong with my car.

Never known a turbo diesel to overfuel like mine has been, along with the lack of boost - hopefully its nothing worse than a new turbo sensor.

fen_l&k · 10-08-2004, 10:28

Jason,

I'm not sure a turbo-related sensor would cause overfuelling like you described. The turbo comes in much lower that the 2k rpm you described. I keep wandering back to something in the area of the MAF......

... but then again, I'm no techie!!!

devonutopia · 10-08-2004, 10:41

Cheers H.

Whats the chance of two faulty MAFs - The MAF from my wreck was stored, opened, but protected from rain etc (was inside the shell) Could this have damaged it? When the new one arrives, I'll try fitting that one as well, but my money still lies elsewhere!

ScoobyChris · 10-08-2004, 10:57

Quote:

Originally Posted by devonutopia

Cheers H.

Whats the chance of two faulty MAFs - The MAF from my wreck was stored, opened, but protected from rain etc (was inside the shell) Could this have damaged it? When the new one arrives, I'll try fitting that one as well, but my money still lies elsewhere!

I guess it depends how much shock it suffered when it was inverted

Chris

devonutopia · 10-08-2004, 11:03

Quote:

Originally Posted by ScoobyChris

I guess it depends how much shock it suffered when it was inverted

***DGW*** · 10-08-2004, 11:51

Jason, how soon did the symptoms start after fitting the 'crashed' MAF?

devonutopia · 10-08-2004, 12:01

Quote:

Originally Posted by DGW

Jason, how soon did the symptoms start after fitting the 'crashed' MAF?

The same as with the old MAF too - full power for around 2 minutes, then it all goes pete tong and I'm left with with slowest Skoda in the country... after the one sat on blocks at mate's place!

We'll see what the dealer has to say at 4.30.

devonutopia · 10-08-2004, 18:23

Well.... It would appear the MAF from my wreck is also under-performing, so I guess it is partially to blame for lack of boost BUT it is also the case that the temperature sensor is being "sporadic" too...

Cheap to replace, but a the moment the car seems to think it's sometimes a lot colder than it really is, so the auto choke is kicking in and overfuelling the engine!

Booked in for Friday afternoon now to have the temp sensor fitted and the MAF on its way from ebay, which should be working!

ScoobyChris · 10-08-2004, 19:22

Glad it's not too serious and should be fixed by the weekend

Chris

big k · 10-08-2004, 22:05

Quote:

Originally Posted by devonutopia

Well.... It would appear the MAF from my wreck is also under-performing, so I guess it is partially to blame for lack of boost BUT it is also the case that the temperature sensor is being "sporadic" too...

Cheap to replace, but a the moment the car seems to think it's sometimes a lot colder than it really is, so the auto choke is kicking in and overfuelling the engine!

Booked in for Friday afternoon now to have the temp sensor fitted and the MAF on its way from ebay, which should be working!

nah wouldn't have thought it was the temp sensor at fault !

09-08-2004, 21:37	#1
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Well, its not the MAF I guess... WTF? Techies? Hi - changed the complete top of my airbox / MAF assembly tonight, and the car is still losing power after just a couple of minutes of starting up! Now I'm running with a working MAF too! GRRRR! What the hell else could this problem with irregular/no boost be? The last time I had something "similar" it was time for a new turbo! I damn well hope its not this again, because the symptoms aren't quite the same really. When the power disappears, and my foots on the floor there seems to be an extra "hiss" from under the bonnet - like the turbo when it spins up, except perhaps its not! So, what could this be? I can see myself having to pay another £30 to my local dealer just to plug my car back into VAG COM! __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

09-08-2004, 22:32	#2
ScoobyChris Briskodian Join Date: Mar 2003 Location: Andover Posts: 18,086 Thanks: 15 Thanked 322 Times in 280 Posts	Jason, may sound obvious, but before you shell out 30 quid, you made sure all the hoses are on tightly and that none of them have split? Chris __________________ Holding up the traffic in a little Italian..........

09-08-2004, 22:54	#3
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	hoses on the MAF? There was another hose which was attached to the MAF/airbox - behind the box, not part of the electrical - I'll check this is OK but it went off and back on the airbox OK, and securely. What other hoses are there? I'll have to have a good rummage around, but I don't see why there should be power when I first start the car, I get full 154bhp for about 2 or 3 minutes, then something kills all power - gotta be a sensor of some sort - only thing that could just switch off the power like that - killing the ignition and restarting the car brings back the power... for a very short length of time! Is there a "turbo" sensor as such, because this was replaced on my last car too - and if I can find it I may swap that too! __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

09-08-2004, 23:03	#4
ScoobyChris Briskodian Join Date: Mar 2003 Location: Andover Posts: 18,086 Thanks: 15 Thanked 322 Times in 280 Posts	Was thinking more of hoses to and from intercooler and around the turbo - things which could be affecting boost. From what you described, it sounds a bit too intermittent to be anything like that............ maybe a VAG-COM session will point you in the right direction Chris __________________ Holding up the traffic in a little Italian..........

10-08-2004, 08:52	#5
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Hi - got a new symptom that became apparent as I tractored into work today, slow as always! Basically in all gears, at around 2000RPM, the engine will suddenly make a noise similar to that of a diesel at start-up (which sounds quite nasty when its running quiet normally) It sounds like its struggling to turn over, or overfuelling, because this sudden tractorish noise is followed by mega amounts of black smoke out the back! This noise only lasts about one second, but it might give a clue - seems the fuelling is all to **! Is there another sensor that could cause this? __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me.** See the mongrel's 260bhp Dyno Video!

10-08-2004, 09:00	#6
fen_l&k Briskodian Join Date: May 2003 Location: Deepest Fenland Posts: 2,559 Thanks: 0 Thanked 0 Times in 0 Posts	Jason, Double check all of the electrical connections too. If you were getting an intermittent connection on, say, the MAF sensor wire, you could get a similar problem to a dodgy MAF. It sounds like a load of fuel was dumped into the engine - hence the smoke. If all else fails, get it to a dealer, Jason - I know its 30 quid, but could turn out a lot more expensive. Cheers, __________________ Howard Octavia TDi L&K in Cayenne Member of the exclusive "Social Misfits" and "Objectionable To55ers" community

10-08-2004, 09:06	#7
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Howard - I'd be suspicious of this if it wasn't intermittent. There's always boost on startup - then it just dies and all these overfuelling symptoms occur... Gonna find a garage with vag com today. __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

10-08-2004, 09:12	#8
Chavyboy Proud Dad Join Date: Jan 2004 Location: Darkest Deepest Peterborough Posts: 3,789 Thanks: 0 Thanked 0 Times in 0 Posts	J, are you sure the MAF you bought hasn't been damaged in the post ? __________________ 2004 '54' Citroen Picasso 1.6 16v Desire HDI in Wicked Red 2004 '54' Vauxhall Corsa 1.3 CDTI Energy Ex Skoda owner

10-08-2004, 09:19	#9
Dougal Briskodian Join Date: Dec 2003 Location: Lancashire Posts: 236 Thanks: 0 Thanked 7 Times in 3 Posts	Are the cambelt, tensioner & waterpump OK? Just a thought Last edited by Dougal; 10-08-2004 at 09:24.

10-08-2004, 09:43	#10
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	cambelt etc should be fine, as the car drives really well, as it should, when first started up. And I am using the original MAF out of my wrecked Fabia, so should be fine. Is there something that needs resetting when swapping MAFs? I didn't think so. I'm gonna have to go to my dealer today I think - A local private VW/Audi place wanted £41 just to plug me in to their vag com! __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

10-08-2004, 10:20	#11
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Booked into my dealers for 16.15 today, so hope their VAG COM will throw up whats wrong with my car. Never known a turbo diesel to overfuel like mine has been, along with the lack of boost - hopefully its nothing worse than a new turbo sensor. __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

10-08-2004, 10:28	#12
fen_l&k Briskodian Join Date: May 2003 Location: Deepest Fenland Posts: 2,559 Thanks: 0 Thanked 0 Times in 0 Posts	Jason, I'm not sure a turbo-related sensor would cause overfuelling like you described. The turbo comes in much lower that the 2k rpm you described. I keep wandering back to something in the area of the MAF...... ... but then again, I'm no techie!!! __________________ Howard Octavia TDi L&K in Cayenne Member of the exclusive "Social Misfits" and "Objectionable To55ers" community

10-08-2004, 10:41	#13
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Cheers H. Whats the chance of two faulty MAFs - The MAF from my wreck was stored, opened, but protected from rain etc (was inside the shell) Could this have damaged it? When the new one arrives, I'll try fitting that one as well, but my money still lies elsewhere! __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

10-08-2004, 11:51	#16
*DGW* BRISKODA Staff Join Date: Oct 2002 Location: Cambridgeshire Posts: 16,988 Thanks: 41 Thanked 147 Times in 112 Posts	Jason, how soon did the symptoms start after fitting the 'crashed' MAF? __________________ Denis 2002 Octavia 1.8T 4X4 turbo Estate - rebreathed on by Jabba ... 31.93mpg 2007 Fabia vRS - CC, ESP, Jabba rear ARB, and full leather trim by Seat Surgeons ...47.73 mpg...

10-08-2004, 18:23	#18
devonutopia Mongreller Join Date: Apr 2003 Location: Ooo-ar, Oi be from Devonshire Posts: 29,053 Thanks: 60 Thanked 272 Times in 222 Posts	Well.... It would appear the MAF from my wreck is also under-performing, so I guess it is partially to blame for lack of boost BUT it is also the case that the temperature sensor is being "sporadic" too... Cheap to replace, but a the moment the car seems to think it's sometimes a lot colder than it really is, so the auto choke is kicking in and overfuelling the engine! Booked in for Friday afternoon now to have the temp sensor fitted and the MAF on its way from ebay, which should be working! __________________ Jason - Mongrel owner! WOOOOF! Grrrrr Custom Fabia Bonnet Lifter Kits - £45! Click Me. See the mongrel's 260bhp Dyno Video!

10-08-2004, 19:22	#19
ScoobyChris Briskodian Join Date: Mar 2003 Location: Andover Posts: 18,086 Thanks: 15 Thanked 322 Times in 280 Posts	Glad it's not too serious and should be fixed by the weekend Chris __________________ Holding up the traffic in a little Italian..........

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