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Electrical Holley fuel pump not pressurizing when turn key to Acc

Electrical Holley fuel pump not pressurizing when turn key to Acc

GreatCJ8

Jeeper
Posts
28
Solutions
1
Thanks
14
Location
Virginia, USA
Vehicle(s)
1 owner 1985 Scrambler Renegade
tech question. Holley sniper fuel pump not spinning up when I turn the key?
Where do start, pun intended.
I did check the fuse.. 85 AMC 258 i6 / 4.2l

Got an event tomorrow and heading to work now. Guess I'll be wrenching in the middle of the night...
Again 😅

20250919_125115.webp

20250919_125105.webp
 
Solution
Got a new relay & 40 amp fuse for the holley system. Got home, not expecting it to work I plugged them both in. Turned the key and it primed! I asked if they had a 2nd but they only had the one.
I need a spare for the trail now..
In the morning I'm swapping the old fuse in then trying and then the same with the relay.
My $ is on the relay.. but yeah maybe I'll go trail riding 🤔 😆
Maybe. Mine was a ground problem out in Moab. And other problems.
 
Ok. Putting it all back together.
Found TWO dangler wires 🫩😮‍💨
I can't find what they go to, plz help. I missed the va4wda trail ride but still wanna go to the event today 😕 these 2 are of the same wire.. the other has a spade attachment. Thought I got a pic, brb

20250920_112206.webp

20250920_112405.webp
 
Ok, pretty sure I figured it out #TIL #iykyk, so the oil pressure unit wire is off and the fuel injection will cut power If oil pressure drops below five psi, so with no power going to the sensor no power would go to the electric fuel pump..
My ??? Is, does anything attach to the top "of the one in the pic"? It's a purple wire btw.
 
Ok spade to the top of the oil unit. I don't like how easy that goes on/off (adds to upgrade list). Now to figure out the other wire...
 
Going to get the gopro out in the morning and climb under for the best view.. got the Blue Ridge Jeep Invasion this weekend.. gotta represent CJs, yo 🫡😆
 
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This wire took me out of last weekends event & now threatens this weekend's at the blue ridge jeep invasion :unsure: anyone know what it is for? The male end plugs in toa wire that is covered in cloth (oem) this wire is an online fuse iirc? It's stiff, not braided like regular wire.

20250924_183616.webp
 
I agree, online lol... Inline I meant. Unpluggable to change it. Which also means my toolbox needs a spare lol. Thanks CJ
 
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Got a new relay & 40 amp fuse for the holley system. Got home, not expecting it to work I plugged them both in. Turned the key and it primed! I asked if they had a 2nd but they only had the one.
I need a spare for the trail now..
In the morning I'm swapping the old fuse in then trying and then the same with the relay.
My $ is on the relay.. but yeah maybe I'll go trail riding 🤔 😆
 
Solution
Go for it !
 
Got a new relay & 40 amp fuse for the holley system. Got home, not expecting it to work I plugged them both in. Turned the key and it primed! I asked if they had a 2nd but they only had the one.
I need a spare for the trail now..
In the morning I'm swapping the old fuse in then trying and then the same with the relay.
My $ is on the relay.. but yeah maybe I'll go trail riding 🤔 😆
Fantastic news! :chug:
 

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