I checked the coil wire per the TSB and rerouted it. Did not help..I also checked the tone wheel/flywheel for damage. No damage..Misfire on 4 persists..

 

I was thinking about the plenum lower cover in the valley..Can this be checked without disassembly?

 

Yes it can...
http://dodgeram.info/tsb/2000/09-05-00.htm

 

Checked the plug wire routing and thats okay..Still missfire number 4...Any way to check the plenum cover on the bottom,in the valley,without disassembly? That would essentially be a vacuum leak,right?.. None of the scanner data supports a vacuum leak or lean condition..

 

..Didnt notice this post before my last post..Thanks man,i will check it tomorrow....This site is great,thanks everybody..

 

Are you clearing the codes via a code reader or by disconnecting the battery for a while after performing a change on something? I think it takes a while for codes to clear in their own.

can you feel the misfire?

 

Using a Snapon Solus and yes it is misfireing..

 

Okay,did the TSB test for a lower plenum cover gasket..There is no vacuum in the crankcase..Its builds pressure..So that checks out Good..Still cylinder 4 misfire..I am thinking mechanical problem,but no noise and a steady vacuum needle..

 

Any other ideas?...Anybody..I tested the injector while it was running by probeing the wires with the connector still hooked,i dint get anything ..I believe i need a low voltage tester to check them this way.