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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine rattle/noise at start up
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<blockquote data-quote="FullAuto" data-source="post: 1376639" data-attributes="member: 12678"><p>I have the phaser rattle at start up and then a warm knock which I've seen could be the vct. The knock can be heard a few feet from the truck and I've had multiple people comment on it. It's not the injectors or the hpfp. It's a low thumping that changes when you hit the gas.</p><p></p><p>The loss of power happened a few times and then I made a mental note to observe what conditions it happens under. I've since then noticed it happens 2- 3 seconds after I hit the gas pedal with maybe 20-40% pressure and always after I just came off acceleration. Example: I'm accelerating up to 50mph and lay off the gas for maybe 5-10 seconds. I then press the gas pedal 20-40% pressure it takes off at first and then dies or hits a flat spot. I've honestly never experienced anything like it before in any vehicles I've driven. It's doesn't feel like turbo lag. It takes off at first and then the motor hits a flat spot and doesn't pull for 1-2 seconds. Probably unrelated to the timing issues but who knows. The earliest the new dealer could see me is the beginning of next month. Hopefully they get this stuff figured out.</p></blockquote><p></p>
[QUOTE="FullAuto, post: 1376639, member: 12678"] I have the phaser rattle at start up and then a warm knock which I've seen could be the vct. The knock can be heard a few feet from the truck and I've had multiple people comment on it. It's not the injectors or the hpfp. It's a low thumping that changes when you hit the gas. The loss of power happened a few times and then I made a mental note to observe what conditions it happens under. I've since then noticed it happens 2- 3 seconds after I hit the gas pedal with maybe 20-40% pressure and always after I just came off acceleration. Example: I'm accelerating up to 50mph and lay off the gas for maybe 5-10 seconds. I then press the gas pedal 20-40% pressure it takes off at first and then dies or hits a flat spot. I've honestly never experienced anything like it before in any vehicles I've driven. It's doesn't feel like turbo lag. It takes off at first and then the motor hits a flat spot and doesn't pull for 1-2 seconds. Probably unrelated to the timing issues but who knows. The earliest the new dealer could see me is the beginning of next month. Hopefully they get this stuff figured out. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine rattle/noise at start up
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