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2000 dodge van 1500 3.9 liter misfire cylinder 4,5,3.has new ecm,reprogram at the dealer,new tune up,and the injectors are working good, cylinder compression is 120.any tips
Optional Information: 2000 Dodge 1500 van 3.9Already Tried: new plugs ,new ecm check the injectors,check cylinder compression,check ecm harness
Hi marcelo,
You probibly have a blown intake gasket or lower plenum gasket.The hose coming off the valve cover going to the air cleaner, remove it from the air cleaner and leave it hookedto the valve cover and check to see if there is a slight vacuum feel on the hose if theres vacuum on it your lower plenum gasket is blown, and you will need to remove the intake to replace it. Please feel free to write me back, thanks David.
ASE Certified Master Technician
All 8 ASE Certifications/ 25 yrs exp./ Dodge, Chrysler & Jeep Professional