anybody knows how to trouble shoot fuel pump relay or something???doing a wrx swap and car is almost done but doesn't want to start... it'll crank but not fire up! theres power going to the fuel pump but i don't here it turning on???
help help help anyone pls!!

 

have you tried a different fuel pump? if there is power going to it them maybe the pump is bad. i'm no expert, just a thought, good luck

 

Talk to Dave he just finished his swap.

 

the way I trouble shoot a NO relay is to take a multimeter and check the leads for continuity. there are usually 5 pins in a normal relay (2 groups of 2, and 1 by itself). 1 of the 2 groups should give you resistance. Next take the goupe that had resistance and apply it to a 12 Volt power source. Now check the Second group of 2 pins for continuity. If the relay is good they will have continuity.

Note: This only work for NO (Normally Open) relays

 

^^^Heh...that all went right over my head.

 

thanks guys,
i'll try it =(

 

you did ground the lt green wire that was goin from the relay to the ecu right??

 

yes i did!!!!
new problem: car ran for a day, now the battery is dead, change the alternator but still getting 7.67 volts. the car just dies after two min or so. check voltage while being jumped and still 7.67 volts....... going lower and lower.. could it be the wires i connected???? need some help pls!!!!! thanks