No Spark
#1
No Spark
I have a 1996 F-150 with a TFI-IV (remote ICM) ignition system. The engine cranks over but there is no spark at the coil. I managed to get the truck started one time after re-charging the battery but the truck ran poorly when reaching speeds close to 50mph (no acceleration). It has not restarted after that and I have been troubleshooting.
I replaced the ignition control module, and also installed a used distributor assembly to no avail. There is 12V at the coil and the primary and secondary resistances on the coil are within tolerances. I also checked the ICM voltage at pin#6 (PIP) and noticed the voltage is only .6VAC when it should be 3.0-8.5VAC. The voltage reading didn't change when I disconnected the PCM.
I am not sure where to go at this point but I am thinking that I may have a problem with the PCM or the new ICM or any of the engine sensors. I thought that I could eliminate the coil based on my previous readings but I am thinking that there still could be a problem with it but I don't know how to check.
One other note is that the fuel pump runs when the key is turned so I know the is power to the PCM. I tried to retrieve trouble codes from the PCM but there aren't any since I took the battery out at one point.
I am confused and any response would be well appreciated.
I replaced the ignition control module, and also installed a used distributor assembly to no avail. There is 12V at the coil and the primary and secondary resistances on the coil are within tolerances. I also checked the ICM voltage at pin#6 (PIP) and noticed the voltage is only .6VAC when it should be 3.0-8.5VAC. The voltage reading didn't change when I disconnected the PCM.
I am not sure where to go at this point but I am thinking that I may have a problem with the PCM or the new ICM or any of the engine sensors. I thought that I could eliminate the coil based on my previous readings but I am thinking that there still could be a problem with it but I don't know how to check.
One other note is that the fuel pump runs when the key is turned so I know the is power to the PCM. I tried to retrieve trouble codes from the PCM but there aren't any since I took the battery out at one point.
I am confused and any response would be well appreciated.
#2