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The #2 injector is not getting any electrical power and there is good spark. Is there a diagram to try and trace the short? 2004 Mustang Cobra

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Please let me know if you have questions, and thanks for using FixYa.

The #2 injector is not - jturcotte_1435.gif
zoom:

jturcotte_1436.gif
Note, the arrow "A", leads to the arrow "C" on the last page below. The "C" then leads to your injector on the page below. The injector 2 pulse comes from PCM pin 101.

jturcotte_1437.gif
zoom:

jturcotte_1438.gif

Posted on Apr 03, 2011

Testimonial: "This is my original question. I find it useful to verify connectivity at pin and connector at harness near pcm. I need to trace harness from pcm to main engine compartment."

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Posted on Jan 02, 2017

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2004 Chevy Trailblazer LT w/inline 6cyl cranks but won't start. Fuse #28PCM-1blows when ign is turned to ON. Do you have a wiring diagram for this circuit? Thank you.Bob


This fuse powers the injectors. You may have a shorted injector but usually this is caused by the pink wire touching a hot engine and melting the insulation--causing a short. First trace the pink wire from the injectors to the fuse box inspecting for damage. Also trace it to the pcm. If no damage, disconnect all injectors and put in a fresh fuse. Turn the ignition on and check the fuse. If it burned, the wire is still shorted and you can assume the injectors are ok. The short could be in the pcm. You can cut the pink wire to the pcm and put in another fuse. If it burns again, you definitely have a short along the wire. If it doesn't, the pcm is bad. Repair the wire with sloder and electrical tape.
If the fuse did not burn the first time, turn thr ignition on and plug the injector in one at a time, checking the fuse after each one to see which one is shorted.


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0996b43f80241d9a-nmkzohv23dbsppgyku1m4xn4-4-2.gif

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Where do they check for all points diagnostics on a 2004 Buick LeSabre


Check these items. - Clogged or faulty fuel injector (s)
- Intake air leak
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Feb 05, 2015 | 2004 Buick LeSabre

1 Answer

Flooding 95 mustang with a 3.8


Well if it is flooding, either something is shorting out the injectors and causing them to be wide open, or one injector is stuck open, or you have a pressure regulator leaking liquid fuel into the intake.
Are all of the spark plugs wet ?
Can you start the engine if you disable the injectors ?

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93 nissan pick uptruck just quit running no sparkk put new cap rotor and power transister on still no spark,tried portable diagnostic and self


Go to Autozone.com and register your vehicle and get a free wiring diagram and powerbox layout. Although it sounds like you have some info.

Sounds like something dependent on the injector circuit is smoked. A bad relay, a bad fuelpump, find out which connects through the injector loop that is not connected when the injectors are out. You should be able to trace it back.

I mentioned the fuelpump because it coasts until the injectors dump fuel into the engine and runs only shortly until the pressure regulator signals a need to kick in again. Perhaps a fuel pressure regulator?

Would be interested in what you find.

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1 Answer

My check engine light came on and I have a code of P0304


You probably have a loose plug wire on #4 cylinder.

First check for that. If that doesn't help, make sure the injector electrical lead is secure.

Next, replace the spark plug on # 4. If that still doesn't help, then a new injector might be needed. Before springing $$ on a new injector, add a bottle of Techron to the fuel and drive it. Techron will clean up a clogged injector better than anything out there.

Good Luck!

Jun 05, 2010 | 1997 Ford Mustang Cobra

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1999 Ford Mustang SVT Cobra not starting


maybe you should put the fuel injector in the car. Hope this helps

Jan 12, 2010 | 1999 Ford Mustang Cobra

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1999 mustang 4.6 not firing on front two cylinders. have spark and fuel. when Running (rough) can pull injecter wire and makes no difference on engine.


i would check compression first. you can jump injector wires from a injector that works to one that does not and see if that makes a difference. i had worked on a car that the injectors were not working on a few cylinders so i jumped the injectors well it turned out to be the ecu was bad.

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1 Answer

Need a engine wiring diagram for a 95 Mustang Cobra 302. Alternator is not charging and the wiring harness was hacked in by previous owner.


try these:
www.allfordmustangs.com/forums/attachments/94.

http://www.veryuseful.com/mustang/tech/engine/images/Mustang-94-95-instrument-cluster.gif

or google: 1995 mustang cobra engine wiring diagram

PLEASE RATE MY ANSWER.

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1990 montero no start. No power to open injectors, good fuel pump


Check the injector pulses with an osciliscope. If you arent getting a pulse check the ecu. I have cooked 2 of them. One killed my ignition but had good fuel. the second time it wouldnt open the injectors but had good spark. A quick check is to take the ecu out and take the cover off. then look for burnt electrical components.

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if fuel pump stay running that one thing but it should not get the cylinder full of gas unless injector stay open if as soon you put the key on the injector open anf fill the cylinder that sound like our computer is shorted try another computer if its ok change the oil before you go the engine is full of gas hope it a fixya thanks pierre

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