Question about 1986 Ford Crown Victoria

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The fuel injection fuse keeps blowing every time it is turned on. The fuse socket shows power on both sides. The ECU or computer was tried in an identical car and it works perfectly.

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Check the 02 sensor wiring

Posted on Jul 19, 2008

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I have a 1992 geo tracker. It is blowing the electronic fuel injection relay fuse.I can replace the fuse after cool down and it will run awhile and blow.


which engine, 8v or 16valves??????
wrong fuse name, its IG-coil or FI. (be clear, it matters)
use correct names please.
there are 2 prime causes, seen 100 times on real suzuki forums
tracker = vitara=sidekick.
ECU caps short.
or the fuel pump is sucking way too much current
4amp is normal on the pump pike power line (real data)
the ECU on 89-95 all had/have bad huge internal capacitors.
http://www.fixkick.com/ECU/ECU.html
that love to leak, short and or explode.
if they have back skins and say Rubicon on side, bingo , TRASH CAPs.
in the real world i can be lots of things shorts.
all wiring on all cars, can short. vibration and time, and bingo.
automobiles use poorly made harness clamps is why.
(unlike air craft,)
here is the 16v wiring (tossed coin for you)

i bet you, FI fuse 24 blows, right?
and is here, see it.


http://www.fixkick.com/ECU/92-95MPI-eng-schematic_files/92-95mpi-eng-full-size-huge.png

top fails are
1: ECU caps.
2: 02 sensor heater wires shorted, melted , last guy forgot clamps.
3: Distributor hot wire shorted to engine body, bad service.
4: fuel pump or its wire shorted.

i use an magic tool called an AMMETER to find which of the 4 pathes are shorting,
but on all G16s, we pull the lid on the ECU first day get car
and check for cap leaks, or cracks.
fix the leaks now, or the ECU will burn up.$$$$$$$$$$$$

for fun , see one guy here now with cap death.

http://www.fixkick.com/bbs2/Suzuki-bbs/showthread.php?tid=916&page=2

the 02 wires are like a 1 second inspection
the distrib wire, 1 second glance.....
the ECU screws, are a #3 huge Phillips screw, and tight.
the first link above as a section called ECU pull.

is car 2door or 4?
is car 2wd or 4.?
is car stick or auto.?
is engine 8v or 16valves. ?
all matter, all wiring is different by those factors, every inch.
tell more get more.... as always...

the 8v has black painted head, TBI
the 16v has silver head that yells, 16valves. MPI
which is it?

there is a page dedicate to this. for 10 years+

http://www.fixkick.com/power-elect/blows-fuse.html#FI_blows

read that.?

May 31, 2016 | 1992 Geo Tracker

1 Answer

Fuel injection fuse keeps blowing


can be lots of things, top reasons are.
is this the 16valve.>? or 8?
shorted ECU, caps shorted out , inside, (1 time event)
shorted injectors 1 of 4
shorted fuel pump very common. and overloads ECU 12v power lines
16v only:
http://www.fixkick.com/ECU/92-95MPI-eng-schematic_files/92-95mpi-eng-full-size-huge.png

ecu shorting is vary common 89 to 95, and never newer years.

http://www.fixkick.com/ECU/ECU.html

more schematics, if not 16v see em, here.
http://www.fixkick.com/schematics-run.html


i use and DC amp clamp meter to find who is shorted (acid test way)

Dec 22, 2013 | 1995 Geo Tracker

1 Answer

My 2004 Suzuki Aerio will not start


the scanner drops out when the power voltage drops too low.
so your 12vdc the ECU is tool low. use volt meter
to find the voltage drop point.
you mean no spark, fire is what fuel does when ignited.
and spark is first. if no spark say, i have no spark to 4 cylinders.
my guess is this.
lost DC power to ECU.
this kills spark
and loss of spark kills injection so, lost power kills injection 2 ways.
find this problem by watching spark and power to ECU.
the ECU will drop out about at 9v.
cranking the voltage usaully sags to about 11v cranking.
now you have a goal 11v min, to ECU at all times.(cept siberia)

Mar 28, 2013 | 2004 Suzuki Aerio

1 Answer

91 geo tracker fi fuse keeps blowning


fuel injection
FI can blow for many reasons.
fixkick.com has that
ECU bad. (caps in side shorted, is extreme common)
Fuel pump shorting are the 2 top reasons.

Mar 21, 2013 | 1992 Geo Tracker

1 Answer

Fuse keeps blowing!


The fuel injection fuse should also power the injectors. If the fuse is blowing, I would think one of the injectors has shorted to ground.
Have you checked them ?

Jul 20, 2012 | 2001 Suzuki Grand Vitara

1 Answer

1991 Honda Civic SI will not start. #14 fuse which is marked alternator/solenoid keeps blowing when trying to start. I am trying to find out what feeds into this fuse to make it keep blowing. My other...


ok first there could be a direct short in the ecu causing the fuse to blow OR the alternator/starter solenoid could be shorting out and blowing the fuse unhook the alternator and see if it blows the fuse then repeat with the starter and the ecu and let me know what happens

Nov 25, 2009 | Honda Civic Cars & Trucks

2 Answers

I have a 2000 Hyundai Accent that keeps blowing the ECU 1 Fuse. I can change it one time and it will last for three weeks then before you know it I can change it 5 times in one day. What does the ECU 1...


The ECM1 fuse blowing usually indicates that the fuel pump wires shorted inside the tank. If you drop the tank and remove the module, you will probably find the insulation burned off the gray pump wire.

Aug 25, 2009 | 2000 Hyundai Elantra

2 Answers

Fuel injecter fuse blow imeditaly when ignition turn on


sounds like a short in the wiring from the fuse and the fuel injector junction block. GM like most fuel injection systems control injector firing by the computer providing ground to each injector in pairs or individually. The fuel injector fuse provides power to the injectors using splices therefore enabling one wire to feed 6 injectors. A shorted wire at any of these wires will blow the fuse. On one rare incident I found a faulty computer caused the fuse to blow. A shorted injector will just cause a rough running problem due to the injector stuck either open or closed.

Aug 05, 2009 | 1991 Chevrolet C2500

2 Answers

Fuel ECU fuse keeps blowing (30 amp)


Your fuel pump is internally binding and causing the fuse to blow. Change the pump (and filter while you're back there.)

Jun 14, 2009 | 1993 Jeep Wrangler

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