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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

no spark. tried about everything...

  • Thread starter Thread starter stangster50
  • Start date Start date May 18, 2008

stangster50

New Member
Nov 19, 2006
129
0
0
cranston ri
May 18, 2008
#1
  • May 18, 2008
  • #1
ok. 87' gt. no spark at coil. put a volt meter on both terminals at coil, and get 12 from both with the key on. tried a coil, tried a dist. module, and still nothing.

the car was sitting for a while, started was running at 2500 rpm and wouldnt come down... running while we were figuring that out.. i shut it off, and now no spark.

i tried a dist. i knew worked, plugged it in, and spun it by hand, while checking spark, and still nothing.. while plugging/unplugging the dist. connector it would arc the coil every once in a while, and prime the pump... i just dont understand why it wont make its own spark, after trying everything..

even plugged a different ecu into it, to make sure it was not a problem...
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
May 18, 2008
#2
  • May 18, 2008
  • #2
HOw did you check for power and ground across the coil's electrical connector? A test light biased across the two terminals should pulse the test light while cranking.

See Jrichker's cranks but no start list in the Useful thread sticky.

Good luck.
 

stangster50

New Member
Nov 19, 2006
129
0
0
cranston ri
May 18, 2008
#3
  • May 18, 2008
  • #3
i also put a testlight in between the 2 terminals on the coil, and it lit while the key was on but didnt seem to flash too much... just kinda stayed dimly lit.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
May 18, 2008
#4
  • May 18, 2008
  • #4
stangster50 said:
i also put a testlight in between the 2 terminals on the coil, and it lit while the key was on but didnt seem to flash too much... just kinda stayed dimly lit.
Click to expand...

You have to be cranking the engine over or letting it idle.
 

stangster50

New Member
Nov 19, 2006
129
0
0
cranston ri
May 18, 2008
#5
  • May 18, 2008
  • #5
sorry... wasnt clear enough... with the key on it was dimly lit, while cranking, it stayed the same, a flicker when i stopped cranking...
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
May 18, 2008
#6
  • May 18, 2008
  • #6
It should not be dimly but constantly lit. It should pulse on and off very quickly. An LED is much better for this kind of diagnostic.

If you have this, but no spark leaving the coil, the coil is suspect.

Good luck.
 

dastang2

Active Member
Dec 11, 2003
2,020
0
46
tx
May 19, 2008
#7
  • May 19, 2008
  • #7
it sounds like he tested it by crossing the negative to positive, correct. not by checking the coil plug terminal to ground. do you have a good ground from motor to body of the car and to the battery.
 
8

87AODGT

Founding Member
Jan 6, 2001
373
1
19
Toms River, NJ
May 19, 2008
#8
  • May 19, 2008
  • #8
might sounds stupid but if you have a tilt column in the car and you can move it around, take the plastic off that is around it, tighten up the bolt on the bottom to get rid of the play. I had that give me hell and I went thru everything else trying to find out why I had no spark, and then later why I had a no crank condition, tightened that bad boy up and never had either problem again, weird but worth a look at
 
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