I have an 05 evo been driving it since dec 07. Ive had no probs other than the battery being in trunk and an 80amp fuse for the relocation wire blew out a few months back and everything died but that was an easy fix replacing the 80amp fuse.

Drove it today and parked it at a friends house I go to leave for home and it doesnt start just keeps cranking, has plenty of battery life it reads 13v. I checked spark its fine, I checked all fuses underhood and underdash and the battery relocation 80 amp they all checked out fine.

Car has 31k miles and the fuel pump is supposidly a walbro 255 I shall see tomorrow when I pull the backseat out but from what I can tell no fuel is reaching the rail. I took a fuel line off and not a single drop came out when cranking the engine. I can hear the fuel pump priming, I think, so it may be a relay? But which relay is the fuel pump relay I havn't been able to find in searching like a diagram or picture of where it is. My guess is one of the 2 on the firewall behind the Intake Manifold, or underdash on the fuse panel.

Any Suggestions, Also mods are as follows ECU was reprogrammed by dynoflash.com and its also tuned through an apexi SAFC. All which have been on the car and working fine since I purchased it back in dec.

 

Well since you are not getting fuel to the rail I would assume...I am going out on a limb here.... but your pump is bad.

 

couldnt it also be a clog somewhere?

 

well the only thing thats really between the tank and the rail is the pump and the fuel filter. i would check to see if that walbro has been installed right. i've never really heard about a fuel filter getting so dirty that it prevents flow but you could check that too...i'd look at the pump first though

 

yeah but if its installed incorrectly problems should have risen sooner than 6 months it would seem, however once i take a look the previous owner could have been lying about the walbro install and it may be a bad pump. Even if its bad though I still should see some fuel at the rail shouldnt I? just low pressure if I did a pressure test? I'm not getting a drop up there all of a sudden.

 

Bump for help for a local guy.

Saw your thread on the local md/va evo forums.

Good luck.

 

thanks man hopefully I can get it started today its stuck at a friends house

 

How much gas is in the car? Is it parked on a hill perhaps? I always start with the easy stuff first.

 

yeah it had half a tank and its parked on level ground. Im going to double check though maybe something punctured the tank and it drained because I purposely tried flooding it last night and couldnt smell any fuel at all.

 

i was traveling down a long bumpy gravel road lots of dust and bumps

 

Ok the pump isn't priming I will try and run a 12v source directly to the pump and see if it cranks up then. If it doesnt crank bad pump I would assume and if it does work then maybe its a relay somewhere, I've triple checked all fuses they are fine. Does anyone know where I can find a diagram that shows me which relays are for the fuel system, I can't seem to pull anything up here or google.

 

worst comes to worse a new walbro is like $85... 90% of the time fuel issues are result of faulty pumps...

 

Ok i was dumb earlier I didnt test the pump in it right I wasnt grounding it. Once i grounded it, it worked fine. So what can cause it not to get ground? It seems to be getting power when I use a test light on the fuel pump drive connector once I turn the key on or try starting

 

Check the connections on the fuel relay. On the VIII it's on the passenger side firewall near the strut tower.

 

can you hear the pump run while cranking? if so i have seen a rubber o-ring in the pump assembly shift allowing pressure to leak back into the fuel tank resulting in no flow at the rail or even out of the pressure line in the pump itself