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#1 |
Registered User
Join Date: Aug 2016
Location: Coast
Posts: 180
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Truck stalling out after switching to primary tank
This seems to be happening every time I switch from the auxiliary tank back to the primary tank. I've had the truck for maybe a couple months or so. It was a long trip to drive it home when I bought it so I filled up one of the auxiliary tanks and ran off that for a while once I made it back home. When I switched back to the primary tank the truck stalled and I had a hard time getting it started back up again. That was probably about a month ago. Once I got it back up and running, I've been driving ever since with no problem, running off the primary tank. I made another long trip a couple weekends ago and ran off the auxiliary tank again until today when I filled up the primary tank again. So I switched back over to the primary tank and it's stalling out on me again. Any idea what's going on here? I'm currently having trouble starting it and running off the primary tank.
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-Jim 71 Chevrolet C20 94 GMC Yukon 4x4 ![]() |
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#2 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,635
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Re: Truck stalling out after switching to primary tank
Non-vented gas cap where it should be vented? Or fuel pickup in that tank is blocked with crud? Pinched / crushed / rotted fuel line?
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#3 |
Registered User
Join Date: Sep 2016
Location: Vancouver BC
Posts: 784
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Re: Truck stalling out after switching to primary tank
If the primary tank sat unused for a long time, it might have rust or varnished gas in it. That would block up the "sock" on the pickup, and might also send rust and crud down the line. It also may have an inline filter in the line under the cab. That could be clogged.
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Rick -69 GMC 910 Long Box, 350 -98 Chev Silverado 1500, 350 Vortec 4L60e -08 Mustang GT Convertible |
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#4 |
Registered User
Join Date: Aug 2016
Location: Coast
Posts: 180
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Re: Truck stalling out after switching to primary tank
Pretty sure I have the right gas cap but I'll check all that stuff out.
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-Jim 71 Chevrolet C20 94 GMC Yukon 4x4 ![]() |
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#5 | |
Registered User
Join Date: Aug 2016
Location: Coast
Posts: 180
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Re: Truck stalling out after switching to primary tank
Quote:
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-Jim 71 Chevrolet C20 94 GMC Yukon 4x4 ![]() |
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#6 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,635
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Re: Truck stalling out after switching to primary tank
A lot longer than a couple weeks. Even today's gas should stay good for at least a few months.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#7 |
Registered User
Join Date: Sep 2016
Location: Vancouver BC
Posts: 784
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Re: Truck stalling out after switching to primary tank
I was under the impression that you'd only had the truck for a couple of months, and perhaps did not have knowledge of how the previous owner used the two tanks.
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Rick -69 GMC 910 Long Box, 350 -98 Chev Silverado 1500, 350 Vortec 4L60e -08 Mustang GT Convertible |
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#8 |
Registered User
Join Date: Aug 2016
Location: Coast
Posts: 180
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Re: Truck stalling out after switching to primary tank
Yes, I have only had the truck for a couple months or so. Unless the previous owner was BS'n me, he said the auxiliary tanks worked fine and he used them. I've only used the one on the driver's side and it works fine - I can switch back and forth from the auxiliary and primary on the fly - actually did that on my first drive home when I bought it - no problem at all. But what I've noticed now, is the two times that I've run off the auxiliary tank for a while, as soon as I switch back to the primary, it stalls out on me. I'm gonna start out by checking the filters.
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-Jim 71 Chevrolet C20 94 GMC Yukon 4x4 ![]() |
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