If you disconnect the fuel pump while battery is hooked up will you have to retrieve the check engine code and clear it to restart engine? I need the fuel pump wiring


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If engine is running yes if check engine light goes on. you'll need a scanner to remove the code if there is one. Here are the wiring diagrams requested they are for the fuel pump and engine wiring with a guide to show how you do the testinghttps://www.beer-selection.com/articles/how-to-check-wiringCheck out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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This may be the same wiring diagram that you have? For the pump itself, gray wire is voltage, black wire is ground. The other two wires are for dash gage. The coil side of relay, dark green wire with white tracer is voltage from computer. Black wire is constant ground. Here are the complete engine and fuel pump wiring diagrams. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
I mounted an external pump but then ended up putting an internal pump my question is will the gas flow through the external pump without the pump hooked up or do I have to disconnect it completely
Depends on the type of aftermarket pump. Most high pressure pumps use a pair of toothed gears and are pretty restrictive when forcing fuel through them when they aren"t running. With a fuel return system with the pressure regulator on the fuel rail on the engine, that will cause stalling due to low fuel pressure when the highest volume is being pumped, which is during coasting.


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Engine Performance problem2002 Chevy Silverado V8 Two Wheel Drive Automatic 168K milesMy truck just randomly died on me in the middle of the road and wouldn"t start back immediately. After sitting for about an hour it started up and made it about 3 miles before I was getting a lot of jerking from the engine not getting fuel. It got towed home and sat there for a day. I started it up and it was running rough for a little bit then started running fine. I took the gas cap off and listened to the pump and it sounded like gargling. I suspected maybe that the gas guage broke and I was outta fuel. I put 5 gallons in it and now it runs fine with just a drive up and down the street. The fuel pump is still making that gargling sound instead of the purge sound right before start up. Will the fuel pump roughly work for this long before completely going out? Or is it a possible gas guage issue.