Question about Cars & Trucks
Dead short to the wiring of the fuel injection. first unplug every fuel injector and put in a new fuse. if it blows look to the wiring going to the fuel pump
Posted on Apr 28, 2015
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Posted on Jan 02, 2017
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
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
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
SOURCE: engine wont start,efi 15amp fuse
EFI (electronic fuel injection) is a nasty fuse to blow. Unplug EFI module for 5 minutes. Plug it back in and try to start it immediately to confirm a heating short or possible bad module.
Posted on Apr 23, 2011
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