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Efi troubleshooting won't start. EfI fuse keeps blowing fuse

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1861 Answers

SOURCE: 1990 toyota pickup 3.0 v6,engine

This is an unfortunatly common problem with this vehicle, if my hypothesis is correct. Try this: disconnect the wiring connector going to the fuel tank, under the bed. Replace the fuse and crank the engine. If the fuse does not blow, then the power wire going to the fuel tank sending unit is shorted out to ground. I change about 15-20 fuel sending units a year for this exact same issue. Replace the fuel tank sending unit if the fuse does not blow. When you get it out, you will see the cause of the short, rust at the connection on top of the sending unit. Hope this helps.

Posted on Sep 15, 2008

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SOURCE: keeps blowing 15a efi fuse 1991 toyota pickup 2.2 re

there's a short somewhere causing that amperage to go up

Posted on Dec 13, 2008

  • 1 Answer

SOURCE: I keep blowing EFI fuses on my Toyota pickup v6 4WD.

i have had this same problem.. check the exhaust pipe near the middle of the truck.. the o2 sensor was hanging down and would blow the efi fuse when the exhaust got hot.. took me months to find it..lol

Posted on Jun 23, 2009

  • 16 Answers

SOURCE: EFI fuse Keeps Blowing

I had the same problem at one point. My issue was a bad grounding point from the battery to the chassis. I would say check all of your grounding points.

Posted on Nov 10, 2009

  • 496 Answers

SOURCE: my 1991 toyota 4runner keeps blowing the efi fuse

Check the EFI main relay, the circuit opening relay, and the fuel pump relay. Inside the fuel pump relay there is a switch controlled by a coil. During start, the fuel pump gets full power for a couple of seconds to build up pressure. Once pressure is good, the fuel pump relay is supposed to switch (via the coil) the fuel pump to reduced power. If the coil in the relay is bad, the reduced power setting is not available and the fuel pump will run at full power all the time. At this heavy current draw, it won't be long until the EFI fuse blows. This would also give more pressure than is necessary to the cold start fuel injector which runs on a timer. This extra pressure during the time that the cold start injector is operating may be the reason the engine is flooding with fuel.

Posted on Jan 29, 2011

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Hi there:
Sounds like to have a fuel pump that is shorted out or has too much resistance, this can cause to much of a current draw and blow the fuse. The EFI fuse supplies voltage to the EFI relay and then the fuel pump.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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If after reading these two articles, you think you would like to try your hand at tracking this down and fixing it yourself, and you are sure you have the correct equipment (as listed in the articles), let me know and I will help walk you through it.

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Engine wont start,efi 15amp fuse keeps blowing


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1 Answer

Keeps blowing 15a efi fuse 1991 toyota pickup 2.2 re


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