Thread: Fuel pump help?!?

As some of you may remember, I finished my DET swap into my s13 a few months ago. The car runs great and the motor pulls hard and is rock solid, I even just did my first track day with it. Problem is that the stock fuel pump went out about 3 months ago, not a big deal I knew it would and was prepared for it. I installed a walbro 255 model GSS341 per the website and all was well again. Fast forward to last Thursday, the pump failed and I needed my car ready for said event. My dad overnighted me another brand new walbro and all was well again. Car ran great all weekend and was a blast. Now today, 5 days later, the fuel pump died and won't even prime again. Anybody have any diognostic tips I should be looking for? What could have cause this? Any help would be amazing!

The set up is a completely stock s13 redtop with the walbro. That is it thus far.

Check the plug with the car off to see if you have a short maybe? or maybe the pump never turns off? you can also try and hotwire it to see if it turns on and if it does then you need to rewire the fuel pump with a relay.

Are you 100% sure it's a Walbro? I have heard about fakes out there. Did you run your car dry, or dirt in the fuel tank?

Both of the pumps that failed in the lasttwo weeks are walbro, bought from an authorized reputable dealer. Both times car had over a quarter tank of gas. Tank is clean.


Anybody know how much voltage I should be seeing at the pump when running? I suspect a bad relay is sending max voltage at all times and burning up the pump. Could that be the culprit? I am by no means an electrical genius.

IIRC the pump gets 12v, so I wouldnt suspect a voltage issue

I believe the problem is a faulty FPR. If my theory stands my faulty FPR is allowing the pump to exceed the needed level and push at max. This would also explain the smell of fuel when sitting at idle.