Dead miss in a 4.0 SOHC
Hi fellas, I have a head scratcher here and in need of a second opinion.
I have a 4.0l with a dead miss in #6 cyl. and a p0306 code I have done/checked the following; -new plugs, wires and coil pack. -new injector in #6 -checked circuit with noid light and ok (also listened to injector tick with stethescope) -compression tested cyl at 145psi. Also checked while running at 55psi (others were 155 and 65 respectively) -removed valve cover and looked at cam and springs etc, looks ok -Pinched off the brake booster line. (thought maybe a vac leak) -marked the harmonic balancer and checked timing on each ign wire.(thinking maybe #6 was late??) all are on time So as you can see i have spark, fuel and compression but still dead miss in #6 Is there something I have missed? Maybe a bad intake? It is plastic after all. I took some propane and ran it around but no noticable change |
Pull number six spark plug inspect it for damage, you can also measure the resistance of the spark plug.
If you do not have a meter and you do not see any damage to the plug just swap it to another cylinder and see if the code changes. |
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