Question about 1989 Toyota Pickup SR5

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Blowing efi fuse

22re/auto 2w.d. Blows efi fuse when taking off from a stop when under medium acceleration or when down shift to pass after about 4 seconds of acceleration. Checked o2 sensor wiring all ok. has 300k on truck, new motor. If I drive like I have an egg under my foot, no problem.

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  • SLIMDOGGIE20 Oct 06, 2008

    iT SEEMS TO BLOW FUSE #1 (ORIGINAL COVER OF FUSES GONE) AT ANY TIME 6 FUSES IN A 100 MILE TRIP.

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Carman963, OK, It sounds like you have a lead wire that is getting grounded out only under acceleration, check all of the wiring running to the engine from the master relay panel and examine any wire or connector that passes within 1 inch of any metal, look for signs of any arcing. Try this first and then get back with me with the results. Good Luck, quicbric

Posted on Oct 01, 2008

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88 toyota pick up v6 keeps blowing efi fuse


you may have a short of some kind, when a fuse blows repeatedly it is no good just replacing, you are being told that something is wrong with the equipment.
You will almost certainly have to visit a technician for a diagnosis. It is unlikely to be something that an inexperienced end user can sort out I am afraid.

GOOD LUCK

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1999 Toyota camry. Automatic trans. Blows fuel pump fuse when shifting into drive. Checked wiring. What else can it be?


Robert: According to CarGurus.com: " I agree it may not be your fuel pump. You can access the pump under your back seat, underneath the cloth under there. You will iummediately see the plug and the screws to open the little hatch. My 1986 Camry also has a problem with not getting any fuel and thought it was the fuel pump. turns out I keep blowing my efi fuse so i unplug the power wires to the fuel pump and it still keeps blowing the 51a efi fuse. So we have narrowed it down to being an electrical problem. We think it is a shortage or a bad relay. So do not instantly run out and think it is your fuel pump. If you are blowing fuses unplug the power wires to the fuel pump and try to crank the car if the fuse still blows then it is not a bad pump, if it does not blow then there is a shortage in the wires in your fuel pump. Hope this helps I will let you know exactly what the elctrical problem is in my car once we do a complete run down."

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15amp efi fuse blows


It is not related to car being cool down , I think you are having ignition switch on . The EFI fuse goes directly to the contact switchin the EFI relay. Maybe try removing the EFI relay, turn the ignition to ON, and see if the fuse blows.
Doing this, the car won't start, but it might give you a clue as to where the short circuit is located. ... Check the fuse/relay box next to the driver side fender in the engine compartment.

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BLRW EFI FUSE UNDER HOOD REPLASED NOW TRUCK NOT STARTING


Hi Cristopher, The EFI fuse protects the computer management system and if blown the engine will not start. Replace it with the correct amperage. If it blows again get the vehicle checked by an auto electrician. If it remains intact happy motoring. regards John

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I have a 1995 gmc sierra 4x4. It blows transmission fuses. When i unplug the wiring harnes from the transmission it stops blowing fuses. Is the short in the trans or in the harness? How do you tell?


The short is inside the trans, but you will need to take the pan off and trace each wire to find out where the short actually is. You have narrowed it down pretty well. One way to really narrow it down before you take the trans out is to unplug the connector and put battery power to the PINK wire cavity. Now take a jumper wire with a 10 amp fuse and touch each wire until the fuse blows. The TAN/BLACK is the Torque Converter Clutch solenoid. BROWN is the 2/3 shift solenoid. Lt. Green is Shift Solenoid "A" and YELLOW/BLACK is Shift Solenoid "B". Those 4 solenoids are powered by the Trans Fuse.

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1 Answer

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Attach a diagnostic computer to the leads on your engine.
Check the codes to confirm that the onboard computer is choosing to shift under the correct conditions.

Or, get your local Dodge dealer (before they go bankrupt) to run the computer-diagnosis.

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From minor problem to major problem. Try to replace your spark plug wires, rotor cap and the spark plugs, also it can be the injectors, plus if possible, try to replace the fuel filter which is located low under your EFI unit. If problem not solved, then it will probably be your A/T trans.

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