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Electrical Reversed Battery Current Momentarily

  • Thread starter Thread starter 92droptopfox
  • Start date Start date May 10, 2021
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    battery ecm foxbody
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92droptopfox

New Member
Mar 3, 2020
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lancaster PA
May 10, 2021
#1
  • May 10, 2021
  • #1
My saga began a year ago, I finished up replacing the intake gaskets on my 92' fox 5.0 and jumped with friends car, unknowingly reversed cables. Noticed smoke coming from the coil/ driver's side area. Seconds later, pulled the cables off. Had to replace fried coil but eventually ran not so great. Drove 15 min til batt died, towed home. Replaced cooked alternator too but hasn't started since. Car has spark and fuel but no start. Went over timing again, seemed ok. Took to reputable shop, they rechecked all my work but found injectors firing at every (4 times vs 1) eng stroke via noid lite, flooding cylinders. Swapped ECM with good used one, also new distributor and some of the harness. 40 yr exp trusted mech says he's out of ideas. Hoping to find a lead on why injectors are receiving so much pulse signal. Car has Trickflo heads and some light mods, maybe 20K on motor reb. Really appreciate any info to get this ole Stang on fire again!
 

limp

wrap a little cheese around it and its a done
5 Year Member
Oct 4, 2020
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Florida
May 10, 2021
#2
  • May 10, 2021
  • #2
There are some very competent and sharp people on here ( I am not one of them) when it comes to the the mustang FI.. Hopefully one of them can help you..
 
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General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
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polk county florida
May 10, 2021
#3
  • May 10, 2021
  • #3
limp said:
There are some very competent and sharp people on here ( I am not one of them) when it comes to the the mustang FI.. Hopefully one of them can help you..
Click to expand...
I'm about as sharp as a marble but I would go back over every wire I moved or replaced, You seem to have something grounded.
 
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2000xp8

SN Certified Technician
Aug 8, 2003
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NJ
May 11, 2021
#4
  • May 11, 2021
  • #4

Cranks OK, but No Start Checklist for Fuel Injected Mustangs

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995 A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work...
www.stangnet.com

The first question that is going to be asked is if you went through the checklist.
 
Reactions: Adieu
9

92droptopfox

New Member
Mar 3, 2020
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1
lancaster PA
May 11, 2021
#5
  • May 11, 2021
  • #5
2000xp8 said:

Cranks OK, but No Start Checklist for Fuel Injected Mustangs

Cranks OK, but No Start Checklist for Fuel Injected 5.0 Mustangs model years 1986-1995 A word about this checklist before you start: it is arranged in a specific order to put the most likely failure items first. That will save you time, energy and money. Start at the top of the list and work...
www.stangnet.com

The first question that is going to be asked is if you went through the checklist.
Click to expand...
Yes I have went over that multiple times, checked everything. The only thing I didnt get a great understanding of is the electrical schematics and direction of flow etc.. Thanks for the suggestion
 
9

92droptopfox

New Member
Mar 3, 2020
5
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1
lancaster PA
May 11, 2021
#6
  • May 11, 2021
  • #6
General karthief said:
I'm about as sharp as a marble but I would go back over every wire I moved or replaced, You seem to have something grounded.
Click to expand...
I will suggest this to the mechanic when I go to pick the car up Weds.. Thank you
 
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