NOT FIRING PLEASE HELP
04-10-2009, 12:05 PM
#1
Thread Starter
Join Date: Apr 2009
Location: tx
Posts: 4
NOT FIRING PLEASE HELP
I have a 2002 3.8 V-6 mustang it is not firing from the coil on 3 and 4 . I have replaced the coil pack and checked plug wires . Still not firing . I measured the primary side, pin 4-1 pin 4-2 and pin 4-3 about the same resistance,
measure from secondary 1-5, 3-4, 2-6 and there about the same. I cranking the engine, check for a pulse to ground at harness side of the connector to the coil. Pin 3 did not pulse so I ohm pin 3 to the computer pin 52 very low resistance. Do need to replace the computer? Thanks for the help.
measure from secondary 1-5, 3-4, 2-6 and there about the same. I cranking the engine, check for a pulse to ground at harness side of the connector to the coil. Pin 3 did not pulse so I ohm pin 3 to the computer pin 52 very low resistance. Do need to replace the computer? Thanks for the help.
04-10-2009, 01:25 PM
#3
Thread Starter
Join Date: Apr 2009
Location: tx
Posts: 4
Has 98000 mile
Same thing with old coil but I don't think its the coil because there are 4 pins that plug in to the coil pack pin 1 and pin 2 pulse my test light pin 3 doesn't and the wire from pin 3 to the pcm pin 52 is good.
Same thing with old coil but I don't think its the coil because there are 4 pins that plug in to the coil pack pin 1 and pin 2 pulse my test light pin 3 doesn't and the wire from pin 3 to the pcm pin 52 is good.
04-10-2009, 10:37 PM
#4
Do you have an electronics book for your car? If not you'll just have to wait until sunday night for a good answer. PCM's don't go bad, so that's not it, unless you got it wet.
Now I repeat myself...
[quote=RyansQuick6;6104930] Did you change the plugs? What brand of parts did you use? What all has been done to the car? quote]
Now I repeat myself...
[quote=RyansQuick6;6104930] Did you change the plugs? What brand of parts did you use? What all has been done to the car? quote]
Last edited by RyansQuick6; 04-10-2009 at 10:43 PM.
04-11-2009, 12:36 PM
#5
Thread Starter
Join Date: Apr 2009
Location: tx
Posts: 4
I didn't change the plug this time because plugs and wires where changed last November
Nothing else has been done to the car
Coil brand was duralast
I don't have a electronics book for this car.
PCM has not been wet.
Nothing else has been done to the car
Coil brand was duralast
I don't have a electronics book for this car.
PCM has not been wet.
04-11-2009, 04:01 PM
#6
the duracrap coil may be the problem. Advanced auto parts actually sells the Motorcraft coil, I'd try that.
FIrst take a pic of your coil and wires and label where they all go so I can make sure you got them going to the right place.
FIrst take a pic of your coil and wires and label where they all go so I can make sure you got them going to the right place.
04-12-2009, 09:42 AM
#7
Thread Starter
Join Date: Apr 2009
Location: tx
Posts: 4
I have a motorcraft coil on it right now it is doing the same thing
It is not the coil because Im only getting a pulse on pin 1 and pin 2 not on pin 3 these are the pins that plug into the coil from the pcm and you should get a pulse on all 3
All the plug wires are in the right place.
It is not the coil because Im only getting a pulse on pin 1 and pin 2 not on pin 3 these are the pins that plug into the coil from the pcm and you should get a pulse on all 3
All the plug wires are in the right place.
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