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Is there a security light lit on the instrument cluster ? If the light is lit this something best left to the dealer , takes special toolIs there a security light lit on the instrument cluster ? If the light is lit this something best left to the dealer , takes special tool
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if you think it is bad replace it, not hard not expensive. here is a link copy and paste
https://fuse-box.info/chrysler/chrysler-300-300c-mk1-lx-2005-2010-fuses
hi Ed.
this is all i could find.
The crankshaft position sensor is located at the right rear side of the engine cylinder block above the oil pan rail. It is positioned and bolted into a machine hole in the engine block.
Click on the link. Primary voltage to coil and fuel injectors comes from asd relay. You can see the fuses in the picture. The higher fuse is hot all the time, the two lower fuses go hot when relay is energized. The computer controls ground on the control side of relay.
Some of these systems, the computer has to see both cam and crank sensor signals or it won't ground the asd relay. Are there any applicable trouble codes?
I can only help with testing.
Did anyone check the coil pack? Fuses, relays? Do you Know if you have fuel PSI or not. Start with the basics, Fuel PSI, AIR & Spark. Have the PC scanned for codes, ck the PSI & Have your spark problem diagnosed. Sounds like you spent enough to fix it already. No pun intended I hate to sound like a teacher but I am. LOL. Good luck Frank M
This already sounds all kinds of bad.
Lets start with spark. Did you verify it can make 30kv at all plugs while cranking? f you havent...start there. Do you have any codes in any modules? Engine, theft, trans, body?
Do you have vacuum cranking, do you have MAF reading cranking? do we know if its mechanically still in time? Did you do a cranking compression test? If you have spark, and you remove the fuel pump relay...does it start when it isnt flooding? What is your system and reference voltage...what is cranking vacuum? And what tests did you run that inspired changing all that stuff? Check the c ranking rpm in Generic mode just rpm onscreen, some OEM software doesnt update well during cranking, with one pid selected, solus should update better than 10x a sec, If you still have no signal...you need to measure the crank sensor wires or verify the crank sensor ring is even turning,
make sure the fuel pump relay is working. just put one in from another place. same size, to see if thats it. or your fuel pump is bad. is it getting spark!
If it is cranking with out turning over I would check the fuel pump and ignition relay, crank and cam sensors.
Basically you need to figure out if you have a spark issue or a fuel issue. (as long as you didn't have a serious overheating problem). One way to help you figure this out is by spraying in some starting fluid while cranking the engine. If it starts you have a fuel problem, if nothing then you have a spark problem (assuming you didn't blow the head gasket from overheating and was running normally before this happened).
Based on what you've already done here are my recommendations:
No spark: check ignition relay
No fuel: check fuel pump relay (aka shutoff relay, aka fuel pump shutoff relay), crank and cam position sensors, fuel filter.
There is also one other possibility, that the timing belt snapped. You would need to remove the timing cover to check this.
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