Juddering and cutting out

[Usman123]

Hi 

 

Recently changed fuel filter on Skoda Octavia ran fine until now car gas started to judder and cut out after downshift in gears loses all power. 

 

Please could any one help 

Cheers 

[TheClient]

Car details may help, engine size, type, model spec, year.

[Usman123]

Skoda Octavia 1.9 pd 2007 

 

Thanks 

[Usman123]

Flushed the heater  matrix, changed filters ran fine a week or so, did  a trip to the airport all went well motorway miles and now suddenly just randomly cuts out judders a d cuts out, even in neutral 

[Gissin]

so it ran fine until you changed the filter - you sure you re fitted it correctly, checked for leaks, used the correct filter

[Usman123]

Ran fine before and a week after the filters were changed everything looks in order no leaks etc 

[Gissin]

you done a scan on it for codes?

[Usman123]

Yea no codes showing 

[Usman123]

Drives fine cold problems occur when car is warm, havent noticed the fans work could be a temperature problem ?

[Usman123]

Battery and alternator  tested both fine not sure wer  to go next 

[Gissin]

possibly injector issue if appears when hot, does it happen more under load?

[Usman123]

Slowing down at a junction mostly 

[Gissin]

sounds like fuel supply, but without seeing it ( can you make a video ?) seeing it first hand , no codes-  it's just shots in the dark. what did you have it scanned with ?

Dodgy/clogged fuel filter or fitting.

fuel pressure regulator

injectors

lift pump in the tank and the tandem pump which acts as a fuel pump and vacuum pump ( I would expect stalling with these)

have you checked all your vac pipes for leaks?

also could be mass air meter and the speed sensor

Edited 10 January, 2018 by Gissin

[Volf]

Sounds like what I had with my last Octi (2.0 BKD)

 

Starts from cold, runs okay until warm. Then splutters under load and cuts out when you slow down. Then it's very hard to start again.

I replaced :

 

- Injector loom

- Injectors

- Fuel filter

- Fuel pick up pump

- Fuel pump relay

- Tandem pump

- MAF sensor

- Fuel and other temp senors

 

Couldn't get to replace the speed or crank sensor, Never found what the issue was. But knowing my luck it could of been one of those last two sensors!

Towed it to a garage who had a look, couldn't test drive it as no MOT, Went to give it one and failed it. So after that I gave up!

[Usman123]

Hi thanks, had another look around car turned off again as soon as it turned off  opened up the fuel filter and surprise surprise the filter had no diesel, turned the ignition on diesal does flow to the filter.

 

Any thoughts fuel pump ?

 

Did also stumble across diesal on the fuel filter line one line looked to be leaking sorted that out, until further testing 

[Usman123]

Also any help with the relay ? Is it situated in the dash ? and what number relay would it be ?

 

Thanks 

[Usman123]

Relays checked fuel pump changed , still no luck

Edited 15 January, 2018 by Usman123