hi everyone.
i drive an evo 8 and i was at the dyno 3days ago and i was getting fuel cut at 5000rpm. they tuner said the fuel pump isn t going in high pressure mode wot.

can someone shine some light on me please. could it be a fuel pump relay, fpr, or the fuel pump itself.

and also the fuel pump won t prime when i turn the key, but it starts up fine and drives normal.

help me please!!!!!

 

Are you running a walbro or stocker?

What other mods are you running?

 

walbro 255hp

 

how old is the walbro,

what is your injector duty cycle at?

ive personally never heard of a fuel pump going into high pressure mode. maybe your spark plugs are out.

 

pretty new bout 15k miles on them.
it was working when i had it then all of a sudden it stop priming when i turn the key

 

anyone please.

 

Check to see if the fuel pump is getting power when you turn the key to prime. If no power then, it's not the fuel pump that's the problem, if it is getting power and not priming, then it's the fuel pump.

 

kool thanks j striker

 

okay change out the fuel pump and the relays. the walbro pump still not priming.. rewired the wires that was corroded in the drivers side kick panel. still no luck

please help any1

 

So, the old fuel pump was getting power, just not priming? You then replaced the old fuel pump with a new one and it's still not working? Am I understanding correctly.

 

What did the TUNER suggest that you do to resolve your fuel pump not going into "high pressure mode"?

 

Same prob here but car wont start!

 

Hello ,
My son's evo 8 doesn't prime either.
I've checked all the fuses /relays and wiring at the kick panel plugs. Nothing there.
Oddly enough this car has never primed , except when we had the transmission and tcase out. When we put the car back together and started it that first time it actually primed. First time for us. We where blaming it on the alarm system that is fitted. Clifford. But I tried to disconnect it yesterday , but it is too deeply wired into the car to make a simple disconnection.
I'm thinking now that maybe a connection in the engine bay. When we get time I'll start wiggling wires while my son try's the key on and off.
Good luck
brt426

 

Well I've jiggled the wiring and still nothing.
Could the ECM have ben tuned and the prime function terminated?
brt426

 

get retuned ftw