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Fuel pump: electric or mechanical?
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Posted: 02/14/09
07:05 PM
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well since the old motor i had in the k5 didn't have the mechanical fuel pump provision, i put in an electric pump, but the rebuilt shortblock i ordered will have the machanical fuel pump provision, so should i put the mechanical pump and line back on or just block it off and use the electrick pump i just installed........the only con i see to the electric is that i might be less reliable, alos am i supposed to put a fuse on it? ive got it connected to my fuse block under the drivers side dash that gets power when i turn on the ignition, does it still need a seperate inline fuse cuz the instructions that came with the pump say its needs a fuse?
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires
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SnoMan
Addict
| Posts: 5783
| Joined: 05/04
Posted: 02/15/09
03:27 AM
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You do want pump fused.
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Posted: 02/15/09
10:02 AM
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 SnoMan:
You do want pump fused.
ok what amp fuse...so should i keep the elctric in there then?
solid axle chevys cant be beat
78 K5: 350 V8,700r4,np208, 8 lug D44 4:88, 14 bolt 10.5 4:88 with detroit locker and 35 inc parenelli jones dirt grip tires
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SnoMan
Addict
| Posts: 5783
| Joined: 05/04
Posted: 02/15/09
04:51 PM
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Depends on pump but I would suggest a maybe 10 amp slow blow for starters. If it has trouble "holding" it they try a 15 amp one.
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Posted: 06/12/09
06:00 PM
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If you have a multi-meter check the resistance of the fuel pump circuit. Take your Ohms reading and multiply by 12. This is the currant draw for the fuel pump circuit, then just round up to the next available fuse amp rating, and yes definitely use a seperate in line fuse.
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