Help !!! 4.3 to v8 swap fuel pump problem

[Dayzedandkonfuzed]

87a is not used on a spdt relay in this application. You can get a spst relay too. Then there is no 87a.

This is why I gave him a part number. Don't confuse the situation, the way I explained it works perfectly, and this relay is usually easier to find.

Yes you could use an 87A relay, in fact there's 100's of relays that could work.

 

[Dayzedandkonfuzed]

I can't find it on the autozone website

This relay is super common, but they must have it under a different number. Your local parts store can cross reference this number to whatever they keep. If you google the number you will get a picture of what you're looking for. Even if you find a 4 terminal relay that looks the same it will still work, all the terminals will be labelled the same.

Borg warner's part number is R681, if this helps at all

 

[87chevyboy]

This relay is super common, but they must have it under a different number. Your local parts store can cross reference this number to whatever they keep. If you google the number you will get a picture of what you're looking for. Even if you find a 4 terminal relay that looks the same it will still work, all the terminals will be labelled the same.

Borg warner's part number is R681, if this helps at all

Thanks brotha

 

[87chevyboy]

Go to your local parts store and pick up a bosch relay number 0-332-019-150 (or equivalent.) Wire it like this:
Terminal 30 - fused power from battery (25A, 14ga wire minimum)
Terminal 85 - Ground
Terminal 86 - Key on power (fused 10A)
Terminal 87 - Fuel pump positive
Terminal 87 - Not used

There are 2 terminals labelled 87, you only need to use one. Typically the 87 terminal in the center of the relay will be unused. It's a good idea to get a harness that fits this relay, less chance of shorting things out.

So do I run the positive fuel pump wire all the way to the front where the relay go's ?

 

[Dayzedandkonfuzed]

So do I run the positive fuel pump wire all the way to the front where the relay go's ?

yes

 

[87chevyboy]

yes

So i looked up if there was a positive cable for the pump on google and I wired it to the tan and white wire on the harness located under the dash on the passenger side it turned on but I don't have any fuel pressure and the pump won't turn off

 

[87chevyboy]

 

[87chevyboy]

yes

I went and looked at the harness that connects to the pump and the positive wire is maroon burgundy looking should I hook up to that? The pump kicks on but I have no pressure and the pump won't shut off

 

[Dayzedandkonfuzed]

Take the wire from the pump, and hook it to the relay, terminal 87.

The only thing you need from under your dash is key on power. Preferably not one that has power when you turn the key back to ACC.

 

[87chevyboy]

Take the wire from the pump, and hook it to the relay, terminal 87.

The only thing you need from under your dash is key on power. Preferably not one that has power when you turn the key back to ACC.

Is there a harness inside the car that goes down to the fuel pump