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Old 12-24-2013, 10:36 PM
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subzali subzali is offline
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Location: Denver CO
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I am inclined to think it is some electrical issue as well, that's why I qualified my post by stating what ignition I have and that I have OEM plugs.

Have you checked your spark plugs for indications of poor/weak spark?

An easy way to test your fuel pump would be to get a pressure gauge and tee it into the rubber discharge of your fuel pump. I think it should be 3-4 psi; I would have to look in the FSM to be sure. Having good pressure helps prevent fuel from vaporizing, so an electric fuel pump could help there. On the other hand, it may be masking other symptoms.
Matt Miller
TLCA# 13684
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, no more Sanden OBA (factory emissions), so Puma OBA
1996 FZJ80 1FZ-FE factory lockers + Safari intercooled turbo, Warn M12000, OEM CDL switch, cup holder, and hand throttle, Metric TLC leather, heated seats, JDM switches, Puma OBA
2000 Tundra Limited TRD 2UZ-FE SOLD
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Old 12-31-2013, 09:04 PM
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Rzeppa Rzeppa is offline
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Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 6,723

My red top blem in my 71 is almost 13 years since I put it into service and is starting to get soft, thus I have been having starting issues this winter. Since I have the "non-USA" distributor I also utilize the non-OEM ballast resistor in series with the coil positive lead. What I have been doing lately is jumping directly from the battery + post to the downstream side of the ballast resistor and she starts right up.

But I have also had the heat soak and stuff at high altitudes even with known good OEM pumps. Both on my 40s and my 60.

To speak to the original question, it is probably not harmful to put a mild electric pump upstream from the mechanical pump, just make sure that it isn't made for MPI, which uses a much higher pressure than TBI. My daughter's 60 had an electric in it when she bought it, it crapped out pretty quick. She got some Autozone generic replacement and it would put out so much pressure that it would stick her bowl needle and cause starvation. When we ditched it and put in an OEM mechanical everything started working like the factory intended.
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
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Old 12-31-2013, 10:46 PM
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Crash Crash is offline
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Location: Denver
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Originally Posted by Rzeppa View Post
When we ditched it and put in an OEM mechanical everything started working like the factory intended.
Happy New Year.
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Old 06-17-2015, 03:54 PM
SteveH SteveH is offline
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Join Date: Aug 2006
Location: Colo Springs
Posts: 1,838

Speaking of mechanical fuel pumps, the aftermarket has ditched them for 1978 (and thereabouts). All you can get (from NAPA, Autozone, Pep Boys, and Rock Auto) are electric/generic replacements. SOR has rebuilt and new for $330 or so. Not sure if Mr. T still sells them - can't get ahold of my parts guy.
Steve H. - KE0KNH
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner
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