Ouch. melted coil, blown fuel pump fuse. TB reset, ridiculous idle, air leak

[paulazoid]

Hi all,

Seat Leon 1.6 2005

I was recently driving and the emissions warning light came on, went into limp home mode, next day it was fine and then it died just as I got home.

It had a melted coil, which I've replaced along with a new set of spark plugs, wouldn't start, fault codes indicated throttle body issue and it ran an error while trying to run the basic settings adaption. I cleaned it, disconnected the battery, left it overnight to clear the ECU, still the same. In the end, the fuel pump fuse had blown (doh!)

I now am getting fault codes signalling an air intake leak. I have cleaned the TB and performed a reset/adaption.

The car is now turning over fine after being left for a while, but soon develops a ridiculously erratic idle and won't rev, beyond 2000rpm if even. It's undriveable.

here's the codes, bearing in mind the battery has been disconnected, ECU cleared previously. I'm stumped and looking for a bit of advice on values of sensors etc to check (I have VCDS lite, registered.

VCDS-Lite Version: Release 1.2
Wednesday, 21 May 2014, 20:05:39:27620


Chassis Type: 1M - Seat Leon/Toledo
Scan: 01,02,03,08,15,17,19,22,35,36,37,46,56

-------------------------------------------------------------------------------
Address 01: Engine Labels: 036-906-034-APE.LBL
Controller: 036 906 034 DS
Component: MARELLI 4MV 5959
Coding: 00031
Shop #: WSC 06402
VCID: 66BF5E7F117F
VSSZZZ1MZ5R077723 SEZ7Z0E2996872
2 Faults Found:
17961 - Barometric / Manifold Pressure Signals: Implausible Correlation
P1553 - 35-00 - -
17912 - Intake Air System: Leak Detected
P1504 - 35-10 - - - Intermittent
Readiness: 1010 0101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 1C0-907-37x-ABS.LBL
Controller: 1C0 907 379 L
Component: ABS FRONT MK60 0101
Coding: 0001025
Shop #: WSC 00001
VCID: 3319F72B122D
2 Faults Found:
01314 - Engine Control Module
004 - No Signal/Communication - Intermittent
01314 - Engine Control Module
013 - Check DTC Memory - Intermittent

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6Q0-909-605-VW5.LBL
Controller: 1C0 909 605 A
Component: 39 AIRBAG VW51 0A 0008
Coding: 13113
Shop #: WSC 06401
VCID: 2237026FBDD7
1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 1M0-920-xx2-17.LBL
Controller: 1M0 920 902 A
Component: KOMBI+WEGFAHRSP VDO V06
Coding: 04406
Shop #: WSC 00000
VCID: 253D1973ACF9
VSSZZZ1MZ5R077723 SEZ7Z0E2996872
3 Faults Found:
01039 - Coolant Temperature Sensor (G2)
30-10 - Open or Short to Plus - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01316 - ABS Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.LBL
Controller: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00006
Shop #: WSC 06402
VCID: F093B827A3BB
2 Faults Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01316 - ABS Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1C0-959-799.LBL
Controller: 1C0 959 799 E
Component: 9A Komfortgerát HLO 0004
Coding: 00066
Shop #: WSC 06402
VCID: 3905C5033041
2 Faults Found:
01330 - Central Control Module for Central Convenience (J393)
53-10 - Supply Voltage Too Low - Intermittent
00929 - Locking Module for Central Locking; Front Passenger Side (F221)
27-10 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 56: Radio Labels: 1J0-035-18x-56.LBL
Controller: 1M0 035 186 K
Component: Radio GRO 3 30
Coding: 00401
Shop #: WSC 06402
VCID: 3013F827E33B
No fault code found.

End --------------------------------------------------------------------------------------------------

 

[paulazoid]

yup, I guess this fault finding exercise is about as interesting as my car

 

[paulazoid]

Seeing as my last request for help was so successful (I even dealt with the usual unhelpful, no codes no help attitude by providing a comprehensive breakdown, scuse the pun), I'll keep this short, reckon it's a faulty ECU, so now I need the SKC and a replacement ECU from a car with the same engine type. BCB 1.6 16v

Has anyone got any ideas as to how much this is likely to cost me, or where I can get the SKC from. Yeah I know I can get a ECU + clocks etc but if I do that will it change the cars mileage?

My next car is going to be an old old one!

 

[ben450]

Personally I think you get good and bad cars. Some people will have a very reliable car others will have nothing but trouble. I've had mine 27 months now and the only thing I've needed was coil packs and the usual maintenance. You could have just as many problems if not more with an old car. I brought a Citreon Saxo VTS when they first came out and was nothing but hassle always going wrong.

 

[paulazoid]

yeah, you're right ben, those VTS cars were nice though, really nippy at the time, I actually really enjoy fixing/working on cars most of the time, this one's just been a bit of a pain, so many things in the past year, alternator went too, and the starter motor needs refurbished but I've forgotten the size of the bolt that I need to get a crows foot type socket bit to remove it.

Anyway, found my SKC (secret key code or whatever it is) so should be piece of pie to fix now, watch this space. A crappy ECU I guess could've contributed to any other problems, and in particular, the coils, fuelpump chain of events.

So for anyone reading this thread in the future, I'll update it with procedure for pairing my ebay bought same engine code ECU via vcds (still not sure the lite version will do this but that's what tonights reading will be on.

But for a little amusement, have a wee chuckle at my expense by contemplating the actions of what must be a man of unstable mind. It's sunday night, I just bought a 1992 saab 900 turbo convertible on ebay and it's in port talbot, which is 449 miles away. I'm going to look at routes for the drive home, and transport costs to get there, oh dear, what have I done