passat

[vokera80e]

any ideas why a car won't go over 30mph...it's a vw passat diesel.

 

[Burnerman]

Its gone into limp home mode, due to a fuelling / exhaust / turbocharger fault.
Presumably the management lamp is lit on the dash - this means that a fault code is stored in the cars computer, which can be read by any garage with the suitable diagnostic gear.
John

 

[KingboyD]

Engine light or glow plug/coil light will be on, faults are prob stored.

 

[gregers]

or it could be the maf.
you can buy ob11 leads very cheaply from ebay and down load the free vag com software to read basic faults for your car.

 

[vokera80e]

He as just rang me to say that he took it to his local garage, and it was the oil pump...Baffled on that one..???

 

[Burnerman]

Some diesels (Izuzu in particular) use engine oil pressure as a means to open the injectors but I don't think thats the case with yours.....presumably the oil pressure was too low to open any hydraulic valve lifters, or the engine was shut down for safety reasons?
John

 

[dhutch]

I would guess its seen the low (but not absent) oil presure and gone into limp home mode in the hope of not eating the engine.


Daniel

 

[Mursal]

2.0L TDi or what?

They give a bit of engine oil pump trouble, otherwise he might have meant fuel pump?