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Weird noise and feel between 40 to 55 mph

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  #1  
Old 10-04-2020, 08:33 PM
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Weird noise and feel between 40 to 55 mph

My 07 f150 makes a weird grinding or studder sound while I accelerate lightly and from time to time it will feel like it limps as I accelerate as well anyone have any ideas of what it could be? Thanks
 
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Old 10-04-2020, 08:36 PM
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Sounds like a typical low-grade misfire. Maybe a torque converter issue.



 
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Old 10-04-2020, 08:38 PM
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Thank you I’ll check into it
 
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Old 10-05-2020, 08:40 PM
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Its typical misfire especially at that speed . it shifts into high gear and starts lugging which shows up misfire shudders. Many guys have wrongly worked on their transmissions for these misfires . Going up a slight hill will also trigger this .
Bad plugs /bad boots, dirty cop connections ,connectors not locking on . Torque pro $5 dollar app +android phone +cheap amazon bluetooth reader under test results will give you per cyl raw computer counts going towards setting a misfire cel . Its under a mode six report on readers . so clean your cops contacts real well ,put new plugs and boots on . Solder in new connectors not locking on .
You can't really diagnose this engine until the ignition circuit is first class and clean .
 
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