Fuses That "Blow" Repeatedly
Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, no one can identify the specific cause/defect which is causing your problem.
The following generic answer applies to any electrical circuit, whether in a vehicle, or in a building, or whether alternating current [AC] or direct current [DC].
Fuses [and Circuit Breakers] are safety devices designed and installed in electrical circuits TO PROTECT the conductors [wires] and other components from short circuit conditions and/or overload conditions which cause an extremely large flow of electrical current [measured in Amperes], which causes overheating of the conductors that results in damage to the insulation and the conductors. And in a worst case scenario, the probability of a FIRE which could destroy the vehicle, house, or other structure in which the circuit is located.
When a fuse or Circuit Breaker [and replacement fuses, or "tripping" Circuit Breakers] "blow," especially if it happens repeatedly, is an indication of an UNSAFE CONDITION in that circuit, usually a short.
The fuse or circuit breaker is doing what it was designed, intended, and installed to do, protect the conductors and components of the circuit which it serves.
The defect causing the short or overload is within the the circuit supplying the EFI unit, and could be within the unit itself, but due to the cost of that component I would not consider replacing it until all other causes have been eliminated, and the unit itself has tested to be defective!
The proper "fix" is for a qualified technician, who knows what he or she is doing, to troubleshoot the involved circuit, find and identify the defect, and make proper repair [s], BEFORE replacing the fuse again [with the properly sized fuse or before resetting a circuit breaker].
Some ignorant few will suggest installing a larger fuse or breaker to solve the problem, BUT that will only increase the hazard, not correct it. Do not follow "bad" advice by installing a larger fuse in a misguided attempt to correct the problem. To install an over-sized fuse would almost guarantee damage to the wiring and an electrical system fire.
most likey a wire that is grounding out some where around your fuel injector wiring harness or a loose ground wire
The only reason a proper sized fuse will blow is if the wiring from the fuse panel to the equipment it is protecting has a direct to ground short or the piece of equipment it protects has malfunctioned.
The EFI fuse is in the underhood fusebox on your Tacoma, it's labelled EFI, so identifying it is easy. Pull firmly.
I heard that the EFI fuse if pulled would reset the check engine light.It didn't work for me.Disconnecting the positive side of the battery did reset it. The negative side will also do the same
Get a wiring diagram to find all that is on that fuse then look from there. Get one from MOTORLIT.COM.
just had this same problem with my 89 with the efi/ecu fuse blowing when you turn the ignition on apparently my ecu is fried and i may have a short to ground in the wiring. as for the other problem i don't have a clue
As you face the front of the 4Runner, you will see the battery at the front right. The FUSE BOX is just beyond the battery. The top of the fuse box has a panel which identifies each fuse. The EFI fuse is the MIDDLE FUSE, closet to the right fender.
On a 2001 Toyota Sequoia, the fuel pump is located on top of the fuel tank. The fuel pump is powered by the EFI fuse and EFI relay.
In the engine bay , on the right side there is a fuse box , take the cover off , and turn cover upside down to see which on is the EFI fuse , if im not mistaken its the second to last , a green 30
have you tried pulling the EFI fuse
No it isn't the vehicle will not run with out it. Unless it has been bypassed somehow. (EFI) stands for electronic fuel injection the vehicle will not get gas without it.
open fuse box remove efi [fuel injector fuse for about10 seconds