Question about 1991 Toyota Previa

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What functions does the EFI relay in a 1991 toyota previa?

The fuel pump is new and I checked the EFI fuse it is alos working. I need to know where I can find the EFI relay in a 1991 toyota previa. If you can post picture even better

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Posted on Jan 02, 2017

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SOURCE: toy turns over but wont run change fuel filter n fuel pump still

The fuel pump should run for a second or two when you first turn the key on, but then shuts down to prevent the engine from flooding if the computer does not get a signal from the crank or cam sensors which the computer uses to trigger the ignition system. So no spark no fuel. Check to see if you have a spark in the ignition system.

Posted on Aug 28, 2009

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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

asetech74
  • 218 Answers

SOURCE: toyota camry 95' fuel pump won't turn on

I would definately check the fuel pump relay, should be located in power distribution box in your vehicle, you may be able to switch it out with a relay of the same type to see if it turns on the fuel pump, but you may need a new fuel pump if this doesn't fix it. Hope this helps.

Posted on Mar 10, 2009

  • 1 Answer

SOURCE: where is the fuel

FUELPUMP WAS REPLACED AND STILL WONt PRESSUREIZE

Posted on Feb 17, 2011

  • 294 Answers

SOURCE: Where is the relay for the fuel pump for a 1991

if you look at cover diagram, found one marked EFI relay that's the one

Posted on Feb 23, 2011

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1 Answer

Which is the fuel pump fuse?


what country, ? and what engine option? ????????????
the pump may not have 12v power until cranked, is engine dead/?
post the systoms so we can understand the context ....
or just curious.
alldata.com has the drawings.

here, ill look for you. USA, and take wild guess on engine.
ok, the toy has a test port conn.
key on, check pressure after.....doing....
Using a jumper wire, short both terminals of the fuel pump check connector. The check connector is located near the air cleaner. Connect the terminals labeled FP and +B.

reasons for pump failure.
  1. If the fuel pump failed to function, it may indicate a faulty pump, but before removing the fuel pump, check the following items within the pump system:
    1. All fusible links
    2. All fuses (EFI-15amp and IGN-10.0amp) "names"
    3. H- fuse (AM2 30A)
    4. EFI main relay
    5. Fuel pump
    6. Circuit opening relay
    7. All wiring connections and grounds related.

i just check pressure cranking, (rubbers meets rode, logic)
if fail, to have 12v at pump i work backwards.
if 12v at pump, then pump is dead if pump is dead.
simple logic, here, and 100% effective.....!

toy spec on pressure is.
The fuel pressure should read 38-44 psi (265-304 kPa).
cranking
and running. with MPI engine the pressure will drop 10psi
due to vacuum reg. rules.......etc....



Nov 30, 2013 | 1991 Toyota Corolla

2 Answers

What is the EFI fuse on a toyota camry


It supplies the EFI Main relay, which in turn powers the fuel pump, ignition switch, and starter relay. In addition it powers the ECM computer, so that if you wish to clear a trouble code from there, you pull the EFI fuse for 30 sec. See here p177

http://www.turboninjas.com/camry/eg1.pdf

Jan 09, 2013 | 1993 Toyota Camry V6

1 Answer

Fuse for fuel pump keeps blowing


Normally fuse blows off if more current passes through it than what it is designed for.

Probably it is worth checking what original fuel pump fuse amps requirements and have the same installed.

Also check the relay if there is a relay set for the fuel pump.

Good luck

Jul 13, 2012 | 1992 Toyota Previa

1 Answer

1995 previa short in fuel system


The short will be in the fuel pump.

Apr 11, 2012 | 1995 Toyota Previa

1 Answer

Fuel pump won't run unless engine is cranking, but won't start


Are you sure it's running when cranking? It should have come on when key turned on.
This is for camrys up to year '91. It may apply in your '95, also. Check the 7.5 amp ignition fuse and the 15 amp EFI fuse and the EFI main relay, all located in the fuse box next to your battery. There is also the circuit opening relay tied in to fuel pump operation. It is usually found under center of dash. It is usually not the problem, but it is part of the checks for fuel pump operation.
If your car has a " check connector" or "service connector" (also called a fuel pump check connector) under hood on driver's side near the firewall (a little 1 inch cube with a cap on it), then bridge terminals +B and Fp with a jumper wire. Turn key to on (don't start car). The pump should come on. Listen for fuel return noise from the fuel pressure regulator, and verify pressure in hose from the fuel filter. If nothing, check those fuses above. Here is how power runs to pump: Battery to 40 amp main fusible link-to 15 amp EFI fuse-to EFI main relay-to circuit opening relay-to fuel pump-to ground. Ignition switch and the computer (ECU) work the relays to pass power to pump. Hope this helps some, Randy. Good luck.

Nov 10, 2011 | 1995 Toyota Camry

1 Answer

My 1991 toyota 4runner keeps blowing the efi fuse and my engine floods gas. what could be the problem?


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.

Jan 29, 2011 | 1991 Toyota 4Runner

2 Answers

1995 toyota camery is there a fuse or relay for the fuel pump


The fuel pump doesn't have a single designated fuse, it gets electrical input voltage from several sources, the fuses tart you need to check are the 7.5A ignition fuse, the 15A EFI, the 15A starter. There are two relays that are involved, the circuit opening relay located behind the glove box and the EFI main relay located in the fuse box under the hood, the most common problem when there is no fuel pressure is the fuel pump, check all the fuses and substitute the two relays to see if it solves the problem.

Nov 18, 2010 | 1995 Toyota Camry

4 Answers

1994 toyota fuel pump relay


Fuel pump relay is in the engine compartment left side fuse block

Jun 30, 2009 | 1991 Toyota Camry

1 Answer

No power to fuel pump relay


check the realy under the shifter knob..see if all 4 plugs are plugged in.. if not check you EFI fuse(its near the the battery fuse box)..if the fuse is fine then it might be ur ecu

Jan 13, 2009 | 1991 Toyota Celica

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