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Raptor 5.4 2010 misfire
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<blockquote data-quote="Mecamano" data-source="post: 1757379" data-attributes="member: 54475"><p>Hello team,</p><p></p><p>I'm back with a new problem. </p><p>F150 2010 5.4 3V 85.000milles</p><p></p><p>Misfire of cylinders 5 and 6. castanet noise</p><p></p><p>They occur above 4,000 rpm on the road when accelerating full load, on hills, on sand...</p><p></p><p>At idle, a slight misfire from time to time.</p><p></p><p>With no load on P and N, bridle at 5,000rpm and back down to 4,000rpm without misfiring. </p><p></p><p>Made work</p><p>Replacement of spark plugs.</p><p>Coil and injector swapping.</p><p>Cleaning MAF sensor.</p><p>CKP sensor changeover.</p><p>replacement 2 x O2 sensor.</p><p>Just replacing 1 x catalyst sensor.</p><p></p><p>The problem persists on the same cylinders.</p><p></p><p>Cylinder leak test at 80 PSI</p><p>5= 72psi</p><p>6= 78psi</p><p>other cylinder 70 , 80.</p><p>I am told about a valve leak, but my test shows that it is not?</p><p></p><p>So I'm thinking of this gas butterfly located in the manifold which will be broken and will clamp the engine.</p><p></p><p>Otherwise, faulty hydraulic tappets or bad oil?</p><p></p><p>Tomorrow I will swap the catalyst sensor as the other is old, see if the problem moves.</p><p></p><p>I am going to do an oil change because it is at maintenance km.</p><p></p><p>Please take the time, because the other garage wants to open the engine.</p><p>And I'm sure the problem is not there.</p><p></p><p>Sincerely</p></blockquote><p></p>
[QUOTE="Mecamano, post: 1757379, member: 54475"] Hello team, I'm back with a new problem. F150 2010 5.4 3V 85.000milles Misfire of cylinders 5 and 6. castanet noise They occur above 4,000 rpm on the road when accelerating full load, on hills, on sand... At idle, a slight misfire from time to time. With no load on P and N, bridle at 5,000rpm and back down to 4,000rpm without misfiring. Made work Replacement of spark plugs. Coil and injector swapping. Cleaning MAF sensor. CKP sensor changeover. replacement 2 x O2 sensor. Just replacing 1 x catalyst sensor. The problem persists on the same cylinders. Cylinder leak test at 80 PSI 5= 72psi 6= 78psi other cylinder 70 , 80. I am told about a valve leak, but my test shows that it is not? So I'm thinking of this gas butterfly located in the manifold which will be broken and will clamp the engine. Otherwise, faulty hydraulic tappets or bad oil? Tomorrow I will swap the catalyst sensor as the other is old, see if the problem moves. I am going to do an oil change because it is at maintenance km. Please take the time, because the other garage wants to open the engine. And I'm sure the problem is not there. Sincerely [/QUOTE]
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Raptor 5.4 2010 misfire
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