The car is a 1993 Mk1 1.8 Eunos and I’m having problems with fuel supply.
I bought the car as a non -runner and a few checks showed the fuel pump wasn’t working. The wiring to the pump is all working fine and I have power at the pump when cranking. I removed the pump, tested it and confirmed it had failed so I bought a used one from a specialist breaker and fitted it. The car still wouldn’t run and it slowly fell to the bottom of the Very Big List of Things I Have To Do.
Now I’m back on with the job and I’m back to square one with a non-running car. Tested the wiring again - definitely OK. Removed the replacement pump and tested it on the bench and its not working.
Now either I have been unlucky enough to buy a pump that was actually stuffed OR something else is blowing fuel pumps, which I find hard to believe. I’m going to buy yet another fuel pump but it would be good to know if anyone else has any other theories about anything that might cause a pump to fail.
Worth draining and flushing out if you can. Also replace the fuel lines as they will be perished, if it’s rubber bits could be flaking off and clogging up.
It doesn’t take much to cover the filter with crud and cause running issues, I used cable ties to raise slightly the fuel filter sock about 20mm at its endpoint, when I have finally gotten al the crud out I shall remove the cable ties, do check the sock filter is clean.
Not yet. I have yet another fuel pump waiting to be fitted. The sock on the end of the old pump was reasonably clean. I’m going to double check through all the electrics before fitting yet another pump though.
I’m finally back on with this: I have a replacement fuel pump and the electrics seems ok but I don’t want to fit the new pump only to have it fail. As others have said, it makes sense to look at the various fuel pipes. Under the car, how much is rubber and how much of the pipes are metal? What might be the best plan to check out the various pipes? Is it simply a matter of straight replacement?
To bring this one to an end, I eventually found the problem. It was in fact the remains of an immobiliser unit hidden high up under the dash. It was only partly connected but it did interrupt the feed from the fuel relay to the pump which meant the pump was only getting power every now and then. I spent a fair bit of time carefully removing the immobiliser and repairing the wiring and it now starts and runs as it should.
That said, the petrol in the tank is ancient and smells vile (like varnish) so I’m going to drain that out and I should be good to go.
Thanks for everyone’s help and ideas.
