Alright, check this out. I'm going to
attempt to solve my own problem here.
First, let's go with what we know:
1) My car will not start due to lack of spark (meaning; there
is no spark).
2) However, the car
did start/run back in November, although I could not get the motor to rev past idle (the first sign that something wasn't quite right).
3) Coil tested fine.
4) TFI module tested fine.
5) MSD ignition box is probably fine.
6) The computer is most likely fine.
6) All of the wires (computer, ground, etc.) are also most likely fine because the car
did start back in November, which means that the current problem is most likely a result of a failed component, rather than a faulty wiring situation.
7) The motor turns over, which means that the ignition switch/fusible links are fine, otherwise the motor wouldn't be turning over in the first place.
The last thing I can think of, would be the PIP sensor.
If we go back to the charts I posted a week ago, which show the voltage readings of all 5 wires (minus the ground wire) that go into the TFI module, we find this:
While Cranking
#1 - 3.5V
#2 - 4.8V
#3 - 8.3V
#4 - 9.5V
#5 - 9.56V
Now,
I still haven't heard anybody confirm that these numbers are, in fact, where they should be. And, on top of that, jrichker's post
here (from the "no spark" thread) suggests that the PIP signal level needs to be above 6.5V in order to trigger the computer.
jrichker said:
Spark with the SPOUT out, but not with the SPOUT in suggests a PIP problem. The PIP signal level needs to be above 6.5 volts to trigger the computer, but only needs to be 5.75 volts to trigger the TFI module. Hence with a weak PIP signal, you could get spark but no injector pulse.
http://www.stangnet.com/mustang-forums/785575-no-spark.html
Is that correct? Because, mine is only reading (or flashing) 3.5V.
Matter of fact, I just got done reading another thread (on a Ford truck forum), which involved a guy who was having a very similar (ignition) problem with his truck. Found in the middle of this thread, was a post by
another gentleman, who pointed out the fact that the PIP wire on the TFI should read at least 6VAC.
Again, mine is only reading 3.5V.
So, does this sound like it could be a viable explanation for why my Mustang isn't producing any spark, or am I completely off the mark here?
Is anybody else able to verify that the top wire on the TFI should be reading 6V?