4.9 no spark
09-14-2013, 09:25 AM
#1
Member
Thread Starter
4.9 no spark
The main bearings in my old motor were bad. The motor started perfect and had lots of spark. I replaced my motor with a 4.9 van motor and now i have no spark. I have followed this
http://easyautodiagnostics.com/ford_...d_module_1.php
to the best of my ability. I have a good 12 volts before the coil. this website says to connect a test light to the coil and to the POSITIVE terminal where the haynes manual says the negative terminal. i did it both ways. With one end connected to the negative i got a bright light with key on and a strong pulsing light with motor cranking. When i connected the wire to the positive terminal i had a bright light till i turned the key on then it went out. when i turned the motor over the light stayed out? according to the wiring diagram in the haynes manual i also should have 12 volts on my 4th wire on my plug for the ICM and i don't. Anyone have any ideas?
http://easyautodiagnostics.com/ford_...d_module_1.php
to the best of my ability. I have a good 12 volts before the coil. this website says to connect a test light to the coil and to the POSITIVE terminal where the haynes manual says the negative terminal. i did it both ways. With one end connected to the negative i got a bright light with key on and a strong pulsing light with motor cranking. When i connected the wire to the positive terminal i had a bright light till i turned the key on then it went out. when i turned the motor over the light stayed out? according to the wiring diagram in the haynes manual i also should have 12 volts on my 4th wire on my plug for the ICM and i don't. Anyone have any ideas?
09-15-2013, 01:35 PM
#3
The main bearings in my old motor were bad. The motor started perfect and had lots of spark. I replaced my motor with a 4.9 van motor and now i have no spark. I have followed this
http://easyautodiagnostics.com/ford_...d_module_1.php
to the best of my ability. I have a good 12 volts before the coil. this website says to connect a test light to the coil and to the POSITIVE terminal where the haynes manual says the negative terminal. i did it both ways. With one end connected to the negative i got a bright light with key on and a strong pulsing light with motor cranking. When i connected the wire to the positive terminal i had a bright light till i turned the key on then it went out. when i turned the motor over the light stayed out? according to the wiring diagram in the haynes manual i also should have 12 volts on my 4th wire on my plug for the ICM and i don't. Anyone have any ideas?
http://easyautodiagnostics.com/ford_...d_module_1.php
to the best of my ability. I have a good 12 volts before the coil. this website says to connect a test light to the coil and to the POSITIVE terminal where the haynes manual says the negative terminal. i did it both ways. With one end connected to the negative i got a bright light with key on and a strong pulsing light with motor cranking. When i connected the wire to the positive terminal i had a bright light till i turned the key on then it went out. when i turned the motor over the light stayed out? according to the wiring diagram in the haynes manual i also should have 12 volts on my 4th wire on my plug for the ICM and i don't. Anyone have any ideas?
09-15-2013, 03:22 PM
#4
Member
Thread Starter
3. Connect alligator clip end of the Test Light to the Battery (+) Positive terminal. It is IMPORTANT that it be connected at the Battery Positive Terminal. page 5.
09-15-2013, 04:14 PM
#5
The only reference I see to a pos terminal is when you're testing for the signal from the ICM, either from the wire on the right side of the plug for the coil (left when you're looking at it, right just means passenger side) or the "#2" wire the op labeled in a pic of the ICM wiring on the page he has you test the ICM.
If you did the tests right then you should have it narrowed to either the ICM or PIP.
If you did the tests right then you should have it narrowed to either the ICM or PIP.
09-15-2013, 04:15 PM
#6
