ECU glitched? Your thoughts please.

[Steve_Perry]

G.,

Thanks for the comparitive info

You wanna get your car back on a rolling road I'll bet your car will be up on measurable HP.

S.

 

[GrahamC230K]

Me too and tomorrow is going to hard to resist, but cant afford........hmm group discount

 

[Shude]

Graham you should have upgraded your pipework to late 99+ style with the relocated MAS at the same time, would have meant buying a couple of different plastic pipes but would release 4bhp . This is something I plan to try in the not-too-distant future...

 

[Steve_Perry]

Originally posted by Shude
Graham you should have upgraded your pipework to late 99+ style with the relocated MAS at the same time, would have meant buying a couple of different plastic pipes but would release 4bhp . This is something I plan to try in the not-too-distant future...

Nick, is this change only relevant to 4cyl or Kompressors only? or is it something that can be done on the V6's too?

S.

 

[Shude]

Originally posted by Steve_Perry
Nick, is this change only relevant to 4cyl or Kompressors only? or is it something that can be done on the V6's too?

I only know of it on the 230k engines, the MAS is in a different place on the v6 (we know now ). The newer 230k engines push out 4bhp more and I always wondered why...it's because the MAS is relocated to somewhere else on the pipe, apparently there can be a lot of turbulence on the pipe where the MAS is located on mine and Graham's, if it's moved to the later location it leads to smoother figures and a small power increase. This is also why it costs about £700 more to get the pulley upgrade for older 230k engines from Kleemann: the price includes the moving of the MAS (it doesn't cost £700 to move the MAS, more like £50!). Something to think about...

 

[GrahamC230K]

Relocating the MAS was not something I had time to even think of in the scenario.


I wont be touching it either. Sounds like something far to fussy to go messing about with. The quote from the dealer "we quite often find customer MAS sensors fail shortly after they have been in for a service" is a classic.

Maybe there will be a 99+ C230K at the GTG we can look at.

 

[GrahamC230K]

How many miles has your car done Steve when it failed?

 

[Steve_Perry]

Originally posted by GrahamC230K
How many miles has your car done Steve when it failed?

Hi G.,

My car was on approx 68,400 miles when the MAS was replaced.

S.

 

[GrahamC230K]

Originally posted by Steve_Perry
Hi G.,

My car was on approx 68,400 miles when the MAS was replaced.

S.

Hmm. 61K

Interesting,

thanks

 

[Steve_Perry]

Originally posted by GrahamC230K
Hmm. 61K

Interesting,

thanks

G., no probs.

Remember though, I'm absolutely positive that my MAS had been going for significantly longer than when it actually failed completely. I reckon my car was on approx 65k or possibly lower when it started the slippery slide. GF has said that MAS failure is fairly common.

S.

 

[Dieselman]

From VW and Seat forums it would appear that the MAF will burn out if you so much as show it a K&N filter box, let alone fit one.

DON'T DO IT!

 

[smiggy]

I have been quoted £165-190 for a V280 ait mass sensor, about the same as for an SLK one.
Can anyone tell me how exactly to go about getting this fabled £70 one.
A part number would be great!

I have the anti-tamper tools to get the MAS out of its housing, if necessary)

Cheers

 

[Dieselman]

I have been quoted £165-190 for a V280 ait mass sensor, about the same as for an SLK one.
Can anyone tell me how exactly to go about getting this fabled £70 one.
A part number would be great!

I have the anti-tamper tools to get the MAS out of its housing, if necessary)

Cheers

You can buy the cheap one from the dealer, unfortunately you need the diesel engine to go with it!!

 

[smiggy]

Oh dear.- no it is petrol, of course but it still has same MAF

I have the same symptoms - 98 SLK - this failed overtaking a lorry on a hot day. - no intermittent failure. Since then it revs to 4500rpm in 1st, then to about 3800-400 in 2/3/4th. you need to come of the gas to get it to change up.
Lovely and smooth up to that point, stable idle.

Mercedes Coventry put it on Star and said it was the brake switch.
Then they took it out and though it was cured to start with, it then broke again and went back to exhibiting the same fault. - Yeah, right!
I did not pay them to fit this switch.

They put it back on star and now say it is the recirculating air valve (£483 fitted). But if I take off the tube from this and rev the engine the flap appears to be working fine. I said I thought it was the MAF and they say they checked this and it was OK (8-13 sthg/hr and mine was 12 - but surely it needs to vary with load/revs according to the very good graphs presented earlier).

The only thing they will do next is change the air valve.
Can anyone suggest anything more sensible/cheaper than this?

 

[smiggy]

In addition.

The Star comes up with Fault P0803 - Air flap switchover acuator.

However, in the faul codes posted on this forum it says P0803 is 1-4 upshift skipshift solenoid control circuit malfunction.

Could it be that they have got it wrong?
could a skipshift solenoid control circuit malfunction cause the above symptoms?

Any help much appreciated.

 

[GrahamC230K]

They put it back on star and now say it is the recirculating air valve (£483 fitted). The only thing they will do next is change the air valve.

.......
Can anyone suggest anything more sensible/cheaper than this?

I'll check my reciept at home if you wish.

The air recirc valve is NOT that much and I don't think that hard to fit. I had mine done when I had a new ECU

 

[smiggy]

Cheers, that'd be useful

Air Flap actuator £207
Hot film Air Mass sensor £247

Cheeky gets.

 

[GrahamC230K]

Cheers, that'd be useful

Air Flap actuator £207
Hot film Air Mass sensor £247

Cheeky gets.

Mass sounds about right. I paid £149.02+vat for my air flap, not sure if that is before or after the 10% discount I got.

 

[smiggy]

Thanks Graham.

I have today found an exchange MAS and a s/hand air flap for £125 which sounds a bit better.

I have given up on the mythical £70 one, but I guess they are finding them somewhere to fit into these exchange parts.

I just hope it works.

The great thing is they will accept returns for a 25% charge, so I'll try the MAS alone first, then the air flap.

 

[smiggy]

Well, the MAS fixed everything and was easy to change (thanks for the warning about needing the Screwfix anti-tamper things!)

Next stop is a refund from Mercedes.

Total bill from mercedes £163 for brake switch and diagnostics + £483 for air flpa actuator, followed no doubt by £247 +labour for an MAS.


Total bill with your help about £150

Many thanks

Stuart