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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
WOT then lost all boost..
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<blockquote data-quote="Operator" data-source="post: 1459611" data-attributes="member: 28294"><p>Hoping for some input/guidance with my 2018 SCREW. Truck has 38000 miles. BMS JB4 and cold air intake. Otherwise stock.</p><p></p><p>Last week while driving WOT the truck lost all boost. I cant remember hearing much noise when it happened. Definitely not a turbo failure. Seemed like it went in to limp mode, but no warning lights. Got it home and started crawling around looking for a blown off charge pipe.. didn't find one. Disconnected the JB4 and went for a ride, still no boost. Only code was an under-boost code. Cleared that and disconnected batteries for the night. Next day started truck and still no boost. Got underneath with a friend giving it throttle to inspect waste gates, they free and functioning in unison. Turbos are quiet, no bearing noise.</p><p></p><p>Thought maybe the BOV was bypassing so I ordered a Turbosmart Veeport. Installed that today, still no boost. Truck starts and drives with no CEL, then after a while I get a wrench light. Its gone after restart every time, but there is never any boost at all. I am stumped.</p><p></p><p>Wondering Plugs/coils? However assuming I would have a misfire code if it was an ignition issue?</p><p></p><p>Truck has a ticking noise on cold start, but it has had that for as long as I can remember. Once warmed up it all but goes away.</p><p></p><p>I have Forscan and I've been fumbling with that trying to diagnose however not having any luck. Is there any procedure using Forscan that can help me diagnose what is happening?</p><p></p><p>Any and all input is very much appreciated!</p></blockquote><p></p>
[QUOTE="Operator, post: 1459611, member: 28294"] Hoping for some input/guidance with my 2018 SCREW. Truck has 38000 miles. BMS JB4 and cold air intake. Otherwise stock. Last week while driving WOT the truck lost all boost. I cant remember hearing much noise when it happened. Definitely not a turbo failure. Seemed like it went in to limp mode, but no warning lights. Got it home and started crawling around looking for a blown off charge pipe.. didn't find one. Disconnected the JB4 and went for a ride, still no boost. Only code was an under-boost code. Cleared that and disconnected batteries for the night. Next day started truck and still no boost. Got underneath with a friend giving it throttle to inspect waste gates, they free and functioning in unison. Turbos are quiet, no bearing noise. Thought maybe the BOV was bypassing so I ordered a Turbosmart Veeport. Installed that today, still no boost. Truck starts and drives with no CEL, then after a while I get a wrench light. Its gone after restart every time, but there is never any boost at all. I am stumped. Wondering Plugs/coils? However assuming I would have a misfire code if it was an ignition issue? Truck has a ticking noise on cold start, but it has had that for as long as I can remember. Once warmed up it all but goes away. I have Forscan and I've been fumbling with that trying to diagnose however not having any luck. Is there any procedure using Forscan that can help me diagnose what is happening? Any and all input is very much appreciated! [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
WOT then lost all boost..
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