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"91 Dakota Ignition

 
TomJeff TomJeff
New User | Posts: 3 | Joined: 07/08
Posted: 07/25/08
07:38 AM

Cylinder #6 is not firing.  Detected by rough run.  Pulled the wire and no change in idle. New wires and plugs.  Getting good spark at the plug.  What could be causing that on this V6?  Throttle body FI.

Thanks  

 
jgate jgate
Enthusiast | Posts: 666 | Joined: 06/07
Posted: 07/25/08
08:59 AM

You next move would be to do a compression test. What did #6 plug look like, oil? burnt? carbon?, coolant?  

 
TomJeff TomJeff
New User | Posts: 3 | Joined: 07/08
Posted: 07/25/08
10:35 AM

80 psi.  Looks clean.  New plug.  Some oil on threads though.  

 
 
TomJeff TomJeff
New User | Posts: 3 | Joined: 07/08
Posted: 07/29/08
01:01 PM

Upon further thought, probably a rod has broken or moved.  Intake valve stuck closed.  On the plus side, getting better mileage with the 5 cyl!