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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2011 Raptor - Problem with Whipple Stage II Going Lean
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<blockquote data-quote="MTF" data-source="post: 1067953" data-attributes="member: 499"><p>Going lean can be caused by quite a few mechanical issues.</p><p></p><p>Fuel pump would not be an issue, even with the Stage 2</p><p>While I did upgrade my fuel pump, it turns out it's not really necessary unless you're going beyond the stock Whipple Stage 2 setup with Whipple's Tune.</p><p></p><p>1) O-rings on the manifold is the number one cause.</p><p>2) Vacuum leaks from any of the hoses and hose connection.</p><p>3) O2 sensors </p><p></p><p>A complete fuel TRIM reading is the only way to tell. Whipple will want that info as well!</p><p>Did the Tuner say which bank or is it both 1 and 2</p><p></p><p>Keep us updated.</p><p></p><p>P.S. You may want to check the fuse 27 issue</p><p></p><p></p><p><span style="color: Red"><span style="font-size: 9px">---------- Post added at 01:25 PM ---------- Previous post was at 01:21 PM ----------</span></span></p><p><span style="color: Red"></span></p><p><span style="color: Red"></span></p><p></p><p>Duty cycle is not the way to determine fuel flow on these trucks.</p><p>Fuel rail pressure is the correct way.</p></blockquote><p></p>
[QUOTE="MTF, post: 1067953, member: 499"] Going lean can be caused by quite a few mechanical issues. Fuel pump would not be an issue, even with the Stage 2 While I did upgrade my fuel pump, it turns out it's not really necessary unless you're going beyond the stock Whipple Stage 2 setup with Whipple's Tune. 1) O-rings on the manifold is the number one cause. 2) Vacuum leaks from any of the hoses and hose connection. 3) O2 sensors A complete fuel TRIM reading is the only way to tell. Whipple will want that info as well! Did the Tuner say which bank or is it both 1 and 2 Keep us updated. P.S. You may want to check the fuse 27 issue [COLOR="Red"][SIZE=1]---------- Post added at 01:25 PM ---------- Previous post was at 01:21 PM ----------[/SIZE] [/COLOR] Duty cycle is not the way to determine fuel flow on these trucks. Fuel rail pressure is the correct way. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2011 Raptor - Problem with Whipple Stage II Going Lean
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