fueling problem

[colinanddonna]

filled up my wedge with fuel the other day but broke down on the way home, just like running out of fuel. the problem was traced to a faulty fuel pump , so this was replaced however the problem still exists. there is no petrol at being pumped into the engine even with the new pump on. can anyone give me an idea what the problem could be (blockage or is there a filter somewhere) as i want to be at Chatsworth this weekend
thanks Colin

[BrianTVR350]

Colin,

I'm assuming the following...

That you have fitted the correct pump.

It's powered and running.

(The way to check is as follows, take off the coil lead, take of the plenum to air flow meter hose. Switch on ignition and go round and move the flap within the air flow meter you should be able to hear the pump running)

If if everything looks OK, check the swirl pot, which is either between the fuel tanks or in front of the pump under the rear wheel arch... They have been known to get blocked up... And then the fuel hoses have been known to perish...

Regards,

Brian (and a Red 350i) which will be at Charsworth!

[B@man]

Did fuel p**s out all over the place when you disconnected the inlet to the pump ?

I changed the swirl pot to pump hose over the weekend and was somewhat surprised at the amount of fuel that sprayed out.... and washed the chassis coating all over me.

I've now fitted a fine mesh strainer and a valve in said pipe..

Simon (still waiting for his new shock eye bushes)

[ferlin]

This may sound daft but when I had a pump fitted recently I had the same problem. It turned out that the connectors on some pumps are switched over and on opposite sides ie what was a larger spade and positive was now a smaller spade connector and negative. I hope you understand what I mean.
The pumps did have symbols next to the connectors though but we never checked them and just assumed things were the same.
Therefore my pump was running backwards and sucked all the fuel from the engine pipework.
Check this before you do anything else!

[Campbell]

I would check for fuel pressure or movement round the rail, pop off one of the fuel lines off the regulator and kick over the engine to see if fuel comes out.
If no fuel you could have a blokage in the filter or in the swirl pot, or the swirl pot could have rusted up, well worth looking at if your pump in new.

Cambelt

[colinanddonna]

thanks for your replies, ive got a few things to check so hopefully will be up and running again soon
Colin

[colinanddonna]

problem has now been sorted thanks to Ferlin's reply. the fuel pump which came off the car had a large positive and small negative terminal, the pump that replaced it was the opposite so it pays to check these things properly
thanks for all replys Colin