MAF Replacement no change + other issues

[PacificQuest]

Afternoon,

In as brief of an explanation as I can be, I have the following issues I was hoping someone could some advice to;

Leon 20VT

1. First got the car, check over diagnostic showed code 16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low

2. Never got round to fixing it for some time

3. Went abroad leaving car locked in garage for 6 months

4. Battery life non existent as you would imagine

5. Fired car up and EPC light was on

6. Battery wouldn't hold charge so called AA Roadside to bump start. Asked him to plug it into his computer out of curiosity, and it came up with a accelerator pedal issue (didn't give me the code), and reset it. EPC light went off.

7. Fully charge battery (4 hour charge) and the next day was fine (still hesitant in 2nd/3rd - put it down to the MAF still)

8. 48 hours later, the Engine Warning light has come on. Read into a lot of threads and most said it was the MAF, being that I had the original diagnostic, I bought one (Bosch from ECP) and replaced it today.

9. Engine warning light still on, and hesitates every now and again but much better than with the old MAF

10. Secondary Air Pump needs re-sealing because it fires up in the mornings like a London Taxi (found a cool guide to fix)

I added the last bit in the event it was linked to any possibilities.

I'm hoping that it could just need an ECU reset where it was flat lined for so long.

Any one got any thoughts?

 

[hyphon12]

Did you check the wiring to the MAF was ok? did you replace it with a genuine Bosch MAF or was it a recon one?

 

[PacificQuest]

I haven't checked the wiring in detail - read up on some red grease you can get to help with the plug.

Part was bought out of a box from ECP with the end caps still on and looked pretty much brand new. Went for the £120 part exchange with £30 off

 

[hyphon12]

Well to be sure I'd rescan the ECU for faults. Never know with it being sitting for so long other things may have become an issue.

 

[PacificQuest]

Okay not had a chance to plug the ECU in yet, just ordered a cable off ebay and hope to have it on Tuesday .. £5.60 with disc ?!

I've had a closer look at the MAF, and spotted some oddities that I'm unsure of.

I'm attempting to add pictures -

This shows a gap .. is this common, or have I been given the wrong model?

Another image -

I've spotted that my plug only has four pin clips, the one on the right is missing - or shouldn't be there, however the MAF socket has five pins .. is this correct?

 

[PacificQuest]

Still waiting for my cable to arrive - should've been here Tuesday grrr

Started the car up today, and low and behold - the Engine Management light has gone out!!

I'm hoping it was just the 'getting used to' on the new MAF

Obviously still going to run a diag as soon as possible

 

[PacificQuest]

Roger, so got it working. Cheap-o software wouldn't let me do much but I got some codes;

VAG-COM Version: Release 409.1-US

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

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 06A 906 032 MJ
Component: 1.8L R4/5VT 0003
Coding: 11510
Shop #: WSC 06402
VSSZZZ1MZ4R069881 SEZ7Z0C2296294
3 Faults Found:
17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
P1297 - 35-10 - - - Intermittent
17545 - Shareware Version. To Decode all DTCs
P1137 - 35-10 - Please Register/Activate - Intermittent
16486 - Shareware Version. To Decode all DTCs
P0102 - 35-10 - Please Register/Activate - Intermittent
Readiness: 0000 0001
-------------------------------------------------------------------------------
Address 03: ABS Brakes
Controller: 1C0 907 379 K
Component: ASR FRONT MK60 0103
Coding: 0022017
Shop #: WSC 00001
No fault code found.


Secondary Air Pump needs sealing - could this be the fault, or have I got a bigger problem on my hands?

Help!!!!!!

 

[nd-photo.nl]

That code could be a hard one.

I had it as well, you need to check all (!!!) pipes and connections from the Boost circuit, so from turbo exit to throttle body. And check the vacuum connections under the intake manifold!

 

[PacificQuest]

Thanks for the advice!

I had a mooch around this morning, and I remember the bloke I bought the car off saying that it had been recently ditched because I pointed out that the intercooler mount under the hood wasn't connected flush - so I stuck my camera under the bumper and found this;

One oily covered Intercooler.

I think I'm gonna have to get the bumper off and have a good look.

Fingers crossed it's only a pipe issue

 

[nd-photo.nl]

Big chance its leaking. Leaking = boost loss = power loss.

If it is, consider an uprated version: http://www.ebay.co.uk/itm/320762147730