8v k-jet problem

[Mars Attacks]

looks like the easiest thing to check, will make sure breathers are clear too from tank. sounds like a pressure build up somewhere in there

[richandhazel]

You should hear the main fuel pump buzzing for 2 secs on start up and then continuously once started. If that is the case then I doubt the fuel pump relay is faulty.........but for the sake of ?12 or so (long time since I've bought one), it might be worth changing all the same.

I'd try disconnecting the fuel supply pipe to your main fuel pump. There is a small strainer in there and it sounds very much like that could be blocked/blocking. Its almost the first line of defense from crud in the tank.  

[Mars Attacks]

i was told that if a relay is damaged, it can slowly deteriorate. Its not simply a case of it works or it doesn't work. At least I hope thats the case as he has ordered a new one today!

[richandhazel]

Its worth changing as a matter of course just as 'vr6 says. If that doesn't fix it, try that fuel pump inlet.........the symptons you're describing are exactly the same as MK1_BOY's and that blocked strainer was the cause.

If the relay doesn't fix, it doesn't hurt to have a spare in your glovebox so you won't have wasted your money either way.

[Mars Attacks]

yeah, its worth getting for 20 notes. the lift pump is new and the white filter on the end was cleaned at the weekend, but the next job is to check for those tank breathers. where exactly should we be looking and how do you go about unblocking them?

[richandhazel]

The white filter on the end of the lift pump is not the one I think you need to look at. Take the fuel supply line off the fuel pump and look into the pump.........there is a small conical filter in there, I reckon that may be blocked.

Just trying to find you a diagram to show you the vent and breather lines.

[golfvr6]

Does the 8v have a lift pump and a in-line pump? or just the lift pump?

[richandhazel]

You'll definately have an in-line pump as well as the lift pump. Its located just forward of the rear o/s wheel........you should hear it buzzing under there.

[richandhazel]

Some of the Mk1's don't have the lift pump........all have the inline.

[golfvr6]

I'm not really up on mk1s , i've never owned one. Surely if the car has a lift and in-line pump, the lift pump is new so have a closer look at the in-line pump.