Grrrrrrr cut out again.

[dixie180]

Hi guys need some help please.Drove the car into town and got stuck in traffic,went to move off and car cut out.Wouldn't restart so left it for 20 minutes and it started ok.This is the second time it's happened in 2 weeks and always when the oil temp gets to around 75 degrees.Had the crank sensor changed so i know its not that.
Any ideas.



Rob

[GOLF-MK3-GTI]

Hi guys need some help please.Drove the car into town and got stuck in traffic,went to move off and car cut out.Wouldn't restart so left it for 20 minutes and it started ok.This is the second time it's happened in 2 weeks and always when the oil temp gets to around 75 degrees.Had the crank sensor changed so i know its not that.
Any ideas.



Rob

When you say it cut out, Did it just lose all power?, Did the revs go all over the place?

Could be ECU Relay?

[dixie180]

Hi.Just cut out and revs just died.Didn't have the flashing oil light syndrome either.It only cuts out when oil temp gets to about 75 degrees.I changed ECU relay and the car ran worse so i put the old one back in.


Rob

[Luke1981]

The car shouldn't run worse with a new ecu relay. Did you purchase OEM? Relay number 109 

[GOLF-MK3-GTI]

Have u tried a new ECU Temp sensor?? Try starting it with this plugged out?

[dixie180]

Yeah ECU relay 30 and new one is white,the old one which is still in the fuse box is black.Where is the ECU temp sensor.The only temp sensor i know of is in front of the block above the oil filter ?.Sorry forgot to say new one is from VW.


Rob

[GOLF-MK3-GTI]

Yeah ECU relay 30 and new one is white,the old one which is still in the fuse box is black.Where is the ECU temp sensor.The only temp sensor i know of is in front of the block above the oil filter ?.Sorry forgot to say new one is from VW.


Rob

It on-top of the water flange, the one which is infront of the engine block, Its got a 4 pin connector

[dixie180]

Yeah changed that and its original VW.Always had a problem with the temp not sitting at 90 but have put that down to worn thermostat.



Rob

[GOLF-MK3-GTI]

touch the relays after driving the car for 10-15 mins, they should be warm to touch, if they are cold, you then have a duff relay.

The fuel pump relay is also common to naff up, Keep an eye on them.

[GOLF-MK3-GTI]

Have you had the car on VAG-COM?? to see if any faults are showing up??