So I have been running a walbro for a while now with no problems... Then about a week ago it started acting funny. When I started the car the pressure was higher than normal and then I would start driving and it would drop. So I went home threw the stock one in with no problems only going lean at wot. So I got a new walbro put it in and and wouldn't fire. Put the stock one in and no problem. So I tried again, and ended up with the same problem like the walbro wasn't getting power??? Put the stock one back in and that's when the trouble began. It started fine, then stumbled to low pressure back up again and then went to zero pressure. Since then I have checked fuses and relays with no luck of a bad part. Also no cel's are flashing either. Sorry for the run on but I am at a loss for what happened... Resistor? crank sensor???
Thank you!

 

bump... anyone?

 

bump...

 

check your fuel pressure regulator that might be the problem why the car is going lean at wot

 

Changed that already too. The problem is not the lean I knew that would happen witht the mods and tune running on stock pump... The problem is that the car will not get any fuel from the pump to start.?.?.?

 

seems that there are no answers on the world of evo's for this... LMFAO!

 

can you here the pump prime when you first turn the key on? is the pump running? the problem goes away when you put the stock pump in huh? thats weird. Maybe you have excessive voltage drop to the pump, do you have a volt meter?

 

fixed the problem... connections were bad to the pump.