walbro 255 weird problem

[shay4g63]

Okay, so i finally got the wally installed.. threw in a spare ecu NON eprom*original ecu is eprom and at ecm tunning for socketing* turn the key to on position. I don't hear Nothing. The fuel pump is rewired. So I fire up the logger, And TEST the pump. bam there she goes firing away?

Why don't i hear it prime when i turn the key to on. But when I test it with the logger it fires?

 

[9!'clipseDOHC]

On DSMs the fuel pump doesn't turn on until the engine is cranking.

Why would you expect the pump to run under those conditions? You have to crank the engine for the pump to turn on or use the test connector to power it.

They don't prime by turning the ignition on. The MPI relay switches power to the fuel pump either when the starter is activated or the ECU sees CAS pulses and thinks the engine is running.

 

[shay4g63]

Oh okay. HAHA.. I've been driving my company work truck to much I guess..

I find it funny that when the chev 1500 is idling beside you it sounds like it has dual walbros in it.