hi, have a 2003 octavia 1.4 16v petrol,have it for 11 years,always well maintained, 166000 miles, new timing belt kit at 148000 , changed 8 months ago,yesterday engine stopped dead coming off motorway, no warning, no bangs, tried to restart it twice,full tank of fuel, turns over but won't fire, no engine warning light on dash and no fault codes showing on ecu , i note that when i turn on ignition i don't hear any noise from fuel pump as you normally would, anyone have any advice, do pumps fail just like that, or could it be the solenoid cut off or anything else,how can i check which is at fault please,thanks,Conor

Edited 3 July, 20178 yr by Conor305

I think there's a fuel pump relay which can be an issue with the 1.8t's not sure if the same as them? Might be worth checking before replacing the pump. Should tell you which one it is in your handbook. I think its under drivers side dash. Hope that is of some help?

30 minutes ago, simspj said:

I think there's a fuel pump relay which can be an issue with the 1.8t's not sure if the same as them? Might be worth checking before replacing the pump. Should tell you which one it is in your handbook. I think its under drivers side dash. Hope that is of some help?

cheers, i'll have a look and try that first,conor

 

update,powered up the fuel pump using battery charger and it primed every time so am assuming its working fine, replaced fuel pump relay with new one, fired up but wont tick over, will stay running if you give it some throttle but revs fluctuate up and down by about 200 rpm every second, tried using spare key in case immobilizer was the problem. ran the same, put the old relay back in, ran the same, got a p0400 code twice on a cheap fault code reader, but i have only just put a brand new oem egr in it 2 weeks ago,cleared fault and it hasn't showed since,still running the same, see video clip of engine running,any  ideas please, many thanks,conor

VID_20170706_222920.3gp

Sounds like its got a massive vacuum leak,though that wouldn't explain it not starting.

On 08/07/2017 at 15:36, Jux said:

Sounds like its got a massive vacuum leak,though that wouldn't explain it not starting.

cheers,got to the bottom of it on saturday morning, seems that the egr was at fault, it was an exchange one, not brand new,and had stuck wide open, not happy about it and don't understand the relay issue and the pump not priming, going fine now,thanks for the advice,conor