Leon Cupra MAF And Wheel Spin Light (TCS and ESP)

[ant61uk]

Hi all, im new to SeatCupra.Net and have just baught a seat leon cupra 2002.

There are two things that I am a bit confused about.

1. The person who i bought it off said the car had a remap to 210 BHP about, and that the MAF sensor had been disconnect as this is required after a remap otherwise it will not run right.

Previously I had an audi a3 1.8t which i believe has the same engine as my cupra AUQ and whilst driving it one day, it broke down and would not even run. The AA man plugged in the scanner and it flagged up Mass air flow sensor signal too low. He disconnected it and told me that the car ecu had defaulted to limp/safe mode i.e. reduced power, and could be driven home now, and so off I went, baught and fitted a new maf, and everything back to normal. P.s. the audi also had a remap.

The Seat Leon seems to drive ok, but is running without the MAF connection, and it does not feel like 210 bhp. Is this true with the SEAT, to disconnect the MAF after a remap, or is this purely a lie. If you connect the MAF, the car will not run right, however the local garage has had a scanner on the car and without the MAF it says the same i.e. signal too low, (assumable as its not connected), but with it, the car will not rev at all, but no fault was displayed as of yet?

I am worried about the car being in Safe mode hence not giving the 100% power.

And ...

2. The symbol on the dash is on for the wheel spin logo, not the ABS light. Again, the scanner has flagged up Engine Control Module (under the ABS header), similarily, the tcs button does not seem to work at all, and no light is display or not displayed when pressing the button? Is this a module in the engine, or is it likely to be the abs pump etc?

Any suggestions for fixing the car, or any advice at all would be greatly appreciated.

Kindest Regards

 

[Chri$]

Plug the MAF back in and clear the code. If it comes back you need a new MAF. No need for it to be disconnected with a remap. Oh, and the spin logo is also to do with the MAF being faulty/disconnected. It will go away when the MAF is sorted.

 

[ant61uk]

Plug the MAF back in and clear the code. If it comes back you need a new MAF. No need for it to be disconnected with a remap. Oh, and the spin logo is also to do with the MAF being faulty/disconnected. It will go away when the MAF is sorted.

Hi Chri$, thanks for the quick reply, when you plug the MAF in, the car will not start, you need to disconnect the MAF to start the car, and then try to reconnect it. Sometimes the car will stall, and other times, the car will run, but when you try to rev it, it will not rev, or struggle and miss fire etc.

The fault DTC for low signal disappears when the MAF is connected, but the car will not run right, which was the previous owners reason to tell me about the MAP excuse. Any suggestions? Also, the ABS Control Module remains with the MAF reconnected.

Kindest Regards

 

[cupra_r_ick]

sounds like it needs a new maf, or atleast putting on vag com, where are you based. the car NEEDS a maf to run right, end of story

 

[Chri$]

Didn't have it myself that the car wouldn't start at all, but certainly sounds like the MAF is buggered. When mine went I was accelerating then got a jolt and the wheel spin light came on and it logged a MAF and ABS code.

I was running a P Torque map with no MAF problems.

 

[ant61uk]

sounds like it needs a new maf, or atleast putting on vag com, where are you based

I live near Bingley, West Yorkshire.

Ive Just baught SUPER-VAG-K-CAN-V4-8-1-VW-IMMO-SCANNER- on ebay and tried it tonight and this gives the same faults, (ABS) Engine Control Module, and if unplugged MAF signal too low, but when plugged in, and DTC cleared, it does not refault, but the car will not run.

 

[cupra_r_ick]

its probs because when the maf is unplugged it runs on a base map. when the maf is plugged in it is listening to what the maf is saying and adjusting mixture etc accordingly. if the maf is faulty, its adjusting it wrong and running like ****

 

[cupra_r_ick]

get some logs up....

 

[ant61uk]

get some logs up....

Ill have a look, but the scanner believe it or not is a bit strange to work. It lets you read the DTCS but what do you mean by Logs?

 

[ant61uk]

Wheel Spin

Just one thing to consider, if my Wheel spin light is on due to the MAF, would that disable the TCS system? When you press the TCS button, nothing happens/displays, and the code reader is still saying (ABS) engine control module?

Kindest Regards

 

[cupra r. ash]

Get a new maf mate. Ther all kind of interlinked some how the abs,tcs. Sounded to me the person you bought the car off didnt want to pay for a new maf...
Wen the maf is unplugged then ther is no air flow being logged. Also wen its unplugged the car will run rich. The maf's are around 90quid. Or around 60quid if you give them yours aswell from gsf car parts

 

[csd_19]

When you unplug the MAF the car uses the MAP sensor to work out how much air is flowing, and to protect itself will also run a bit more rich than normal.

 

[ant61uk]

Get a new maf mate. Ther all kind of interlinked some how the abs,tcs. Sounded to me the person you bought the car off didnt want to pay for a new maf...
Wen the maf is unplugged then ther is no air flow being logged. Also wen its unplugged the car will run rich. The maf's are around 90quid. Or around 60quid if you give them yours aswell from gsf car parts

New MAF order, will pick it up this afternoon and update every one.

Thanks for your help.

 

[traumapat]

Personally id get this to a specialist vag tuner. Do you know whos mapped it? Running without the maf will as said run rich causing damage to the cat over time. But has this been adjusted by the mapper?
Hopefully youll replace the maf and it will run fine, I just wonder what the previous owner and mapper have done to the car. Was the previous owner lied to by the mapper? If the map cant run with a maf then lord knows what maps on there.

All of the tuners on this site run maps on the standard set up including the maf. even big turbo conversions.

 

[ant61uk]

Thanks to every body for your help. Fitted the new Bosch MAF this afternoon, cleared the fault codes and the wheel spin light has gone out. The car is driving a lot better and I am thinking it is fixed ! thanks again.

'Traumapat' its got a replacement sports cat, but not sure about the map. Is their any other way to check if it has a map other than taking it to a rolling road ?

 

[traumapat]

Thanks to every body for your help. Fitted the new Bosch MAF this afternoon, cleared the fault codes and the wheel spin light has gone out. The car is driving a lot better and I am thinking it is fixed ! thanks again.

'Traumapat' its got a replacement sports cat, but not sure about the map. Is their any other way to check if it has a map other than taking it to a rolling road ?

The plot thickens

A sports cat is usualy fitted along with a bigger diameter downpipe as a stage 2 mod and coupled with a custom/stage 2 map should see 230-240 bhp. Maybe it was being prepped for stage 2 rather than just a replacement cat.

Either vagcom software logging the boost, fitting a boost gauge and seeing it or getting down to a meet and just comparing against others to see what you might have powerwise (I mean comparing mods rather than racing!).

Nice result on the maf

 

[lewissykes88]

Hi do any of you know why the tcs button doesnt work or what it could be? the tcs and esp all works but i cant switch it off with the button.?

 

[AshBoy]

hi some interesting posts on here i cleaned my maf yesterday with some eletrical contact cleaner and went for a drive after it was ok for a second then went into limp mode but with no EML so took it home reset the fault code which displayed system too rich disconnected n75 and reconnected it went back out and shes fine for now boost doesnt seem the drop at high end of the revs anymore either which is reson i cleaned it in the first place. but TCS will flash up and high revs and it doesnt feel like its wheelspinning any ideas