Could my map have gone funny after having the battery off the car for about 4 months?

It will only boost sometimes but very rarely and tonnes of black smoke pours out until it goes into limp mode.

had the error code p1557 which means error from ecu. When these problems occur the traction light comes on. All hoses and lines are connected.

Nope it shouldnt loose anything like that as far as I know!

Is the car at unit18?

Adam

No, the car is on my drive and a few people have mentioned about the map going funny if the battery is left off for long periods of time. I have tried a new mass air flow meter too and it's not that.

I'd say because its been sat, the VNT is sticking, the fault indicates Positive Deviation, so it's going into limp mode. The map will definitely not have been affected.

Brand new turbo, pistons, head gasket, cam belt and water pump dude

Ok, didn't realise that, check this link out, possibly the turbo's not been setup correctly http://wiki.ross-tec...65/P1557/005463

getting some LOG's done with VCDS will point you in the right direction.

Edited 13 September, 201213 yr by bondi

Have questioned that the veins or whatever that gubbins is was or wasn't set up properly. Mechanic said it would have been done at the turbo centre.

What do you mean getting some logs done with vcds. he did plug it in and **** about for a bit but don't know what he done.

Would poorly set up veins cause it to boost properly sometimes then all of a sudden try to boost but not then another time boost like half of what it normally does and then go into limp. All the time it does this except limp mode it chucks soot out to the extent that cars behind me swerve

doing Live LOGs involves driving the car (depending what you are logging of course) at normally at Wide Open Throttle with a laptop or similar connected to the car via the diagnostics port and monitoring different sensors and logging the data for examination.

http://www.ross-tech...ur/logging.html

Possible Causes

• Boost Pressure too High
  
• Hoses/Pipes incorrect connected, disconnected, blocked or leaking
  
• Charger Pressure Control defective
  
  • VNT (variable nozzle turbo): nozzles stuck
    

  [*]Solenoid Valve for Boost Pressure Control (N75) defective

Possible Solutions

• Check Hoses/Pipes to/between Components
  
• Check Solenoid Valve for Boost Pressure Control (N75)
  
• Check / Clean / Replace Charge Pressure Control
  
  • Check / Clean mechanism for variable nozzles
    

Soot behind will mean the AFR is out, basically too much fuel, not enough air (boost)

Edited 13 September, 201213 yr by bondi

Heard many stories of the actuator not being setup correctly. But as Bondi says needs log to se whats happening.

If its smoking then the smoke map isn't doing a very good job or your loosing air after the sensors.

Could be the actuator is not set up right, or the vanes could have seized up due to rust, rather than carbon build up. Somethings not right as it is overboosting. Could be a vacuum leak perhaps.

Edited 13 September, 201213 yr by trundlenut

Mr muscle, worth a try do a search, mr muscle vnt turbo treatment.