Intermittant Stalling Issue

[Matrix]

Hi all

My Ibiza Cupra Mk3 has an annoying intermittent problem; when I rev the engine to 1500rpm approx. if I let the revs fall the engine will stall.

I wanna get my Cupra remapped to Phase1, but not before I’ve sorted out this problem.

I have replaced the crank sensor, air mass meter, temp sensor and had the ECU remapped back to standard.

Apart from the revs occasionally hunting the car is fine, pulls all the way to the redline.

Anyone got any ideas as to the reason this is happening?

 

[Robbie C]

Have you run a VAG com on it yet?

maybe a dodgy lambda sensor?

 

[Matrix]

I did pull out a few VAG COM Fault codes the other day:
17511 - Oxygen (Lambda) Sensor Heating: B1 S1: Performance too Low
P1103 - 35-10 - - - Intermittent
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
17535 - Fuel Trim: Bank 1 (Mult): System too Rich
P1127 - 35-10 - - - Intermittent

The only one I was concerned about was the 17965, research point to a faulty N75, so I’ll change that to a N75J, just in case.

Only problem with the Lambda is there’s are two I believe? Which one to replace or both if need be; which I would imagine will be costly.

 

[Black TDI Turbo]

17511 - Oxygen (Lambda) Sensor Heating: B1 S1: Performance too Low

Refers to B1- Bank S1 - sensor 1 which is the pre cat sensor. There around £80 i think.