what causes rough idle then not when engine light comes on, computer issue? on 2005 Dodge Dakota

The code indicated is misfire cyl 5 but plug has been replaced, coil pack has been replaced, EGR valve has been replaced, have gone to 2 shops, including Dodge dealer but they cannot determine problem HELP!

by in Victoria, TX on December 24, 2012
2 answers 3 comments
ANSWER by on December 24, 2012
With a real scanner pay close attention to the map sensor!! Yes i know, sounds crazy.
ANSWER by on December 24, 2012
Understand something, just because the dealer sells the model doesn't mean they know how to fix it. What are the codes.
COMMENT by on December 25, 2012
0305 Cyl 5 misfire detected - everytime
COMMENT by on December 25, 2012
Customer Concern: Engine is setting misfire codes. Has good spark and have swapped the injectors around. Compression is normal. Tests/Procedures: 1. Connect a vacuum gauge. If the needle is erratic, check if an exhaust rocker arm has fallen out of place. 2. If so, carbon build-up on the valve is the likely cause. You need to remove the valve cover which number 5 is and check valve train.
COMMENT by on December 25, 2012
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