Hi, I have a 2004 Sebring Touring Convertible. 2.7L V6 with MIL lamp on

The code is 98% of the time P303 once in a while it's P300

I don't have the fancy test equipment, so here's what I have tried to trouble shoot. I put in all new plugs (good ones) and swapped coil packs from odds to evens. Light came back on. I then moved injectors from odds to evens.
Lastly I changed the Crankshaft position sensor. The error does not follow the parts, i.e. i the code is still P303

any suggestions?

Thanks

 

check for power and ground to the coil and the injector

 

will do. thanks

 

ok checked for good ground. I checked from the connector to Batt gnd. Good, I wiggled the wiring harness and could not get it to drop. I put a slight bend in the male end of the connector to make sure it was connecting good.

Light came back on after 8-10 miles

 

u did not do a single thing I asked you to do.

With a volt meter at the fuel injector check for power and ground pulse
at the coil check for power and ground.

 

as I stated in my post, i did check for ground at both with a volt meter. even wiggled the harness to see if the ground would drop due to a pinched wire.

I did not check for power, forgot to do that

 

and the results of your finding is??? I cant give an idea where to go unless there in info and feed back on your part what was the voltage was there ground at either one?

 

as I put in my post the ground was good "ok checked for good ground. I checked from the connector to Batt gnd. Good, I wiggled the wiring harness and could not get it to drop. I put a slight bend in the male end of the connector to make sure it was connecting good."

as for the power as I stated in another post I forgot to check for that.

how will I get the injector to get power without the engine running? The only thin I could think of was to check continuity of the Yellow/White wire to pin 7 on the pcm. then check for voltage pulse at the pcm. what is the acceptable voltage range?

thanks for your help!

 

the ASD relay provides power the pcm is the ground so I say again U had a ground pulse with the engine running or what did u have? plus U cant check for ground with a volt meter by putting a lead on the - post U must complete circuit which means if u are checking for power one lead on the - batt post and the other on a power source to check for ground a lead needs to be on the + batt post and the other end on a ground source. What ever test u did proved nothing this is what U do

at the injector or coil either one but check both.
one wire will have 12v with the key on for 2 seconds or all the time when the engine is running. the other wire will have a ground pulse from the pcm with that knowledge now go back and recheck the circuits and see which u are missing for the misfire issue.

 

ok sorry, I misunderstood. I just checked to see if the wire was grounded. with the engine off I checked for continuity between the DG/LG wire to - batt terminal and it was dead short. I will try again tonight with engine on.