Originally Posted by
joecar
Ok, I reread your post #1:
- getting fuel,
- not getting spark;
Post #34: removed radio and motor started, but won't run after 3 starts...
I assume starter cranks ok each time.
Check with scantool that PCM's fuel enable state is on and VATS state is off...
i.e. is PCM not fueling dues to VATS/BCM theft reason (are you having key pellet trouble...?)...?
Verify that you are getting fuel (I'm assuming so).
Verify that you are not getting spark (I'm assuming not).
Do you have a LED test light (i.e. uses red/green LED instead of a light bulb)...?
This draws low current which prevents damaging the PCM's internal sources/sinks;
Get one from local parts store;
Refer to coil diagrams in PCM folder I posted above...
If no spark, then coils are not firing...
disconnect coil primary and with key on check:
- battery voltage between pins D and A;
- zero (or almost zero) volts between pins B and A;
If those fail, then there is a grounding problem or a PCM with dead sources/sinks;
then while cranking, check:
- voltage "signal" between pins C and B using LED test light;
If that fails, then must determine why there is no coil trigger signal (go upstream)...
open/short circuit, or grounding problem;
If those all pass and you get this far, then something's wrong with the coils or grounding or spark plugs/wires.