Replaced oil sender/pressure switch
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Joined: Jan 2002
Posts: 135
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From: In a pineapple under the sea
Car: `91 rs
Engine: 352 TPI
Transmission: TH700 R4
Replaced oil sender/pressure switch
I replaced the oil sender sensor at the oil filter this morning and now the fuel pump will not prime? I`m planning to replace the relay tomorrow but is there anything else I would need to look at?
This is in a `91 camaro rs with a 305 tbi. Any suggestions would be helpful.
This is in a `91 camaro rs with a 305 tbi. Any suggestions would be helpful.
Supreme Member
Joined: Dec 2001
Posts: 1,418
Likes: 1
From: Morris, IL
Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
My only suggestion would be to check the harness near and at the oil pressure sending unit. It could be possible one of the wires busted somewhere, not sure if it would cause the fuel pump not to prime, but worth a shot. good luck
Supreme Member
Joined: Jun 2003
Posts: 1,054
Likes: 0
From: Ft. Branch, In.
Car: 88 formula WS6
Engine: 305 Lo3
Transmission: 700-R4
Your pump will not prime from the switch. It will only build pressure during cranking. The switch has to see oil pressure before the ECM can tell the pump, HEY, The engine needs fuel! This causes longer cranking times before the engine will start. Sounds like your relay is shot.
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