5.3 swap fuel pump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shifty1125 · 07-21-2012, 01:48 PM

I've had my swap done for almost a year now and changed from a in-line pump to a in-tank pump. Any way yesterday right after I started it leaving a fast food place it died and wouldn't restart. After some testing figure out the fuel pump wasn't coming on. Was getting power just wasn't coming on. Got it towed to work where a trailer was to take it home. While at work I tried to start it and it started fine. And after I got it home off the trailer or was fine. So everything seems to work fine now. Why would the pump not work at all and now all of a sudden it does. I drove it for 4 weeks everyday with no problem. And before that I drove it every other week no problem.

**hatzie** · 07-21-2012, 08:36 PM

Corrosion on the ground point??

shifty1125 · 07-22-2012, 02:08 AM

I'll clean it but looks fine. I'm gonna run a new power wire to. The ground makes sense because sometimes the fuel level on the gauge stops working. I'll check it out. Weird that it worked fine for so long then boom without warning.
Well I take that back. If I floored it it would act like it was bogging down. But thought it just wasn't shifting right. I'll look at it tomorrow. I have rubber fuel lines to. I was wondering if they were to big?
Or could it of been vapor locked? What causes vapor lock?

07-21-2012, 01:48 PM	#1
shifty1125 Registered User Join Date: Jul 2012 Location: mustang, ok Posts: 35	5.3 swap fuel pump I've had my swap done for almost a year now and changed from a in-line pump to a in-tank pump. Any way yesterday right after I started it leaving a fast food place it died and wouldn't restart. After some testing figure out the fuel pump wasn't coming on. Was getting power just wasn't coming on. Got it towed to work where a trailer was to take it home. While at work I tried to start it and it started fine. And after I got it home off the trailer or was fine. So everything seems to work fine now. Why would the pump not work at all and now all of a sudden it does. I drove it for 4 weeks everyday with no problem. And before that I drove it every other week no problem.

07-21-2012, 08:36 PM	#2
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,935	Re: 5.3 swap fuel pump Corrosion on the ground point?? __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

07-22-2012, 02:08 AM	#3
shifty1125 Registered User Join Date: Jul 2012 Location: mustang, ok Posts: 35	Re: 5.3 swap fuel pump I'll clean it but looks fine. I'm gonna run a new power wire to. The ground makes sense because sometimes the fuel level on the gauge stops working. I'll check it out. Weird that it worked fine for so long then boom without warning. Well I take that back. If I floored it it would act like it was bogging down. But thought it just wasn't shifting right. I'll look at it tomorrow. I have rubber fuel lines to. I was wondering if they were to big? Or could it of been vapor locked? What causes vapor lock?



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