Hi all,

 

I've got a cutting out problem which would suggest a failed PTU but I'm 99.9% sure it's not. Basically the engine will cut out wether idling or while driving and I will get a strong smell of petrol. The engine will then turn over but not start. A few minutes later, it'll start. It can then repeat this 5 minutes later or be fine for a few weeks.

 

I was using a series 1 PTU and when the engine cut out, I replaced it with another series 1 PTU which I kept in the glove box and I know works but still had the same problem. I then changed it for a series 2 but today, it cut out again, so I've kinda ruled out the PTU.

 

I've got no ecu error codes and am going to clean all the engine bay connectors tomorrow but can anyone think of what might be causing this?

 

Cheers

 

Vijay

Is it an auto box you have Vijay.

Hi Tony,

 

nope it's a UK manual :)

 

Vijay

Any fuel leaks? Fuel return hose?

 

Maybe the pump is going.

 

DOes it only happen when idleing?

 

What mods do you have? It could be an air leak or a MAS problem.

no fuel smells until it's cut out. What's the fuel return hose?

 

I did wonder about the fuel pump but thought there wouldn't be a smell of petrol when it cut out. The fact that there is a stong smell of petrol made me think no spark.

 

It happens while driving as well.

 

Mods are JWT cone filter, JWT chip with Apexi AVC-r boost controller and de-catted exhaust system.

 

The MAF should still let it idle and go to 2500rpm in limp home mode.

Anyone?

Im clutching at straws here but...

Dont know if its possible but what about over-fuelling?

This kept me buisy for a day when mine wouldnt start.

 

Apparently the water temperature sender unit sends wrong signals to ECU and overfuels.

 

Topless suggested I should pull fuelpump fuse...turnover...replace fuse and ..HeyPresto....it worked :hyper:

Got a new sensor the next day so it didnt have a chance to re-occur so not sure if this was 100% to blame but its fine now :duffer:

Hi,

 

The temp sensor was been changed a while back but I can look at that on the Conzult.

 

Been advised by a man in the know that it looks like it could be the CAS. Gonna clean all the connectors and hope. If not, I'll have to change over the CAS :(

 

Cheers guys,

 

Vijay

oh yer...forgot bought the CAS :headvswal .....Good Luck:duffer: