Fuel Pump Relay

I checked ignition and there was no spark.I checked fuse panel under the hood on fender well and found that ecm-1 fuse had no power.I supplyed power to it, truck started and my dash warning lights where working. Where should I start looking for the open circuit.

1997 Chevy Truck

Is the fuel pump supposed too kick in everytime u turn the key on if so what would cause it not to.I replaced the relay.I'm having to prime engine to start after it sets overnight. Fuel pump only kicks in maybe 2 out of 5 times.

Thanks I found the problem. The contact in the key switch was burnt.

Engine 5.7 and 1500 series

So I could have a faulty relay or what should I check?

Replaced fuel relay and still can't get fuel pump to kick in every time I cycle key any suggestions?

Hi just got the truck last week
and even my insurance agent was impressed
it was a 1 owner and only has 101,000
(350 or 5.7 with OD auto trans)

ok anyway which leads to my problem
i just put a cat back system in it
and while under the truck I could hear the fuel pump humming away key off and not even in the ignition

i was thinking fuel pump relay possibly stuck?
But I cant seem to find it
i went back to the prior owner
he's trying to find the owners manual for me
(their in their 60's and seems the Mrs. Took it out to read and never put it back)

all help would be greatly appreciated, Thank U all, signed Joe M.

It should be on the passenger side on firewall next to blower motor. At least that is where mine is on my 89 chevy

Electrical problem
1990 Chevy Truck V8 Two Wheel Drive Manual

Have a 1990 3500 chevy truck. Fuel pump runs with key off. It will shut off after 5-10 minutes. Misses while idling. Have check relay and fuse. Both good. Where is fuel pump oil pressure switch and could a faulty one be causing this?

I dont know what you meen by fuel pump oil pressure switch. The electric pump will have a fuel pressure switch built in. Have you checked the ignitioon switch and ignition relays.

Oil pressure switch is located behind distr. Unhooked it and fuel pump shuts off. Put new one on and pump is doing same thing. Showed high oil pressure all the time, then when I unplugged it it showed hi pressure at start up and then none when key off. With new switch, it shows 60 lb at start up and bleeds down to half way when key shut off. Also check gauges lite is coming on with new switch.

If your check guages lite is coming on it will store fault codes in the computer. You can pick up a scanner for about $30. That will help you pinpoint the problem more accurately.

[Computer will not store codes as I have to unhook bat cable for pump to shut off. Replaced ignition switch and it is still doing it. When I unhook ing switch the pump runs right. Help

Wow thats a weird one. Did you ever have any wiring problems in the past, wires melted together or anything like that. Maybe you got a bad switch from the parts store.