Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
Hello and thank you for your question,Have you ran a compression test on these for cylinders?Do you have power at the four coils on these cylinders on the red/lite green power wire?
Yes Im here.
Can you take a volt meter and check the key on power at the four coils on the red.green wire for me?
Check the voltage with the key on and post back with the results and we can work fro there, also if you can see if a compression test was done on the four misfiring cylinder .
Sure thing, Im here all day.
With the key on you should see battery voltage at each coil on the red/green wire.
The coils are fired by ground switching on the other wire, you need power to the green/red wire and the ground is provided by the PCM (computer) to fire the coil.
It looks to me like the meter you are using does not read 12 volts or your on the wrong scale. It need to be set on 12 volts before testing.
Yes that looks right scale, now you need to see 12 volts.
I cant be sure because its very hard to read your screen due to smudge but it looks like you have battery voltage. I'm thinking you have a bad driver in the PCM (computer) . The coils are fired by ground switching from the PCM, you can check to see if this is the case by taking a standard 12 volt test light and placing the test end on the power side of the coil and back probing the other wire and start the engine, if you have the ground switch signal from the PCM the light should flash, if it does not on all foue cylinder then that means the computer is likely the source of your problem .
If the PCM you replaced is working then the test light should flash at each coil with the engine cranking and or running, is the light flashing?
You need to try it on the cylinders that are not firing meaning 5 6 7 and 8.