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Jun 13, 2020 | 09:34 PM

George LoÃ±g

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Joined: Jun 2020

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where to begin

hi just got 98 f150 4.6 previose owner removed cat also o2 sensors starts fine every time wen cold then craps out qwen warm all codes are sensor clean tb and map to begin help would be great ty in advance

Jun 14, 2020 | 05:57 AM

mbb

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Replace cats and o2 sensors is good start.

Jun 14, 2020 | 07:59 AM

River1

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Joined: Jul 2015

Posts: 3,627

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From: Michigan

Runs fine when cold and like hell when warm? The engine sounds like it's running just like it's suppose to with the changes you've made. The problem isn't with your engine.

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