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07 expedition 5.4L cylinder 6 misfire
so its running rough and has check engine light cylinder 6 misfire
changed all plugs autolite HT1 changed all coil on plugs changed cylinder 6 fuel injector Took off all fuel injectors hand cleaned them with intermittent battery and fuel injector cleaner and compressed air they are all very clean now changed cam sensor changed crank sensor changed fuel filter ran premium gas added seafoam 1 tank ago cleaned maf sensor with cleaner and air dryed I have no oil in water no water in oil i have cleared codes swapped items back and forth and still cylinder 6 misfire any ideas from you folks that have been on here awhile ???? should i check compression on all cylinders next ? What is the min max for cylinders usually ? any thing under 100 bad ? Also works great under 45mph but when i get up to 60mph the check engine light comes on and cyl 6 misfire and stays on after a couple of times HELP:-arrgh |
I would have checked compression before buying any parts.
Part 1 -Troubleshooting Misfire Codes Ford 4.6L, 5.4L |
it was a bad plug from autolite
berry1234 - that was not too helpful
it was a autolite spark plug that was the issue i changed it to a new autolite same issue changed to motorcraft sp151 plug and it runs fine now se to fit oh compression was 115 and held on a leak down test for 45 minutes i would have checked compression but the threads are a diff mm size on this one so i had to order a hose for it |
Originally Posted by mdec950
(Post 11780223)
berry1234 - that was not too helpful
it was a autolite spark plug that was the issue i changed it to a new autolite same issue changed to motorcraft sp151 plug and it runs fine now se to fit oh compression was 115 and held on a leak down test for 45 minutes i would have checked compression but the threads are a diff mm size on this one so i had to order a hose for it Regardless, I am glad you found the issue. I have heard anything other than Moto spark plugs will cause problems. |
oh its fixed
no "real thanks" to anyone on these forums
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Then maybe you should go elsewhere. I offered advice. You didn't like it. It was solid advice. Throwing parts at a problem is ridiculous by any mechanics definition. It's a waste of money.
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2008 Ford Expidition King Ranch
I have a 2008 Ford Expidition King Ranch got a code for camshaft position sensor. So I changed both cam shaft sensor's still missing but no trouble codes. Any ideas what it would be
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