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2004 Lincoln Aviator w/4.6 engine
Our Aviator misses., but the scanner can't decide which cylinder to pick, so it keeps changing randomly to a different cylinder. No pattern! All coil packs are good and plugs too. All O2 sensors have been replaced and are good. The injectors all test good. . My mechanic is at a loss. I'm looking for help. My mechanic suggested injjector kleaner and hope the problem is cured. It has a 4.6 dual over-head cam engine. Does this sound familiar to anyone?
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One thing that can affect all cyls like what is happening here could involve the crank sensor. They don't usually throw a code either.
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Same here
Originally Posted by Robert Boehler
(Post 117124)
Our Aviator misses., but the scanner can't decide which cylinder to pick, so it keeps changing randomly to a different cylinder. No pattern! All coil packs are good and plugs too. All O2 sensors have been replaced and are good. The injectors all test good. . My mechanic is at a loss. I'm looking for help. My mechanic suggested injjector kleaner and hope the problem is cured. It has a 4.6 dual over-head cam engine. Does this sound familiar to anyone?
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Sometimes ,,,,,,,,,,,stray electrical signals from an unsuspecting source can drive the system nuts.
I believe a tech with a good knowledge of how to use a scope can pin this down. There are just so many things we can see and trace with the naked eye and some special equip might reveal what s happening and it's source. |
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