7.3 loses power WOT once warm - Ford Powerstroke Diesel Forum
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Old 01-18-2014, 06:38 AM
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Exclamation 7.3 loses power WOT once warm

I have a stock 02 powerstroke with 7.3 with just intake and exhaust.. Just had sct extreme race tune added but the problem has been around since the truck was stock and also my buddy with the same truck and tune pulls away from me hard when the problem is happening, I cant figure it out. My problem im having is when I start my truck first thing in the morning cold its runs like a raped ape with no acceleration issues at all. But once the truck is up to temperation it will only pull hard up to half throttle and after that it just has no more balls almost like I hooked a trailor to it. boost is good and it still smokes normally with the tune. But it loses its beastly sound and doesn't pull anymore after half throttle, im lost.. Ive replaced just about everything I can think would cause this issue. replaced throttle pedal, cam sensor did boost fooler etc. The truck throws no codes besides when im at high speed full throttle with my race tune on it will throw low/high ipr code but that goes away, but my issue still occurs even on stock tune and it wont throw that code. ive also done a buzz test and injector 8 fails buzz test but i was told that was common with cylinder 8 but im not sure, someone please give me some ideas because im stumped

Last edited by supr_strokr7.3; 01-18-2014 at 06:40 AM. Reason: needed to rephrase my question
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Old 01-21-2014, 10:27 AM
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Weak HPOP....not giving enough pressure to the injectors. does it get quiet or muffled sounding?
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Old 01-21-2014, 10:42 AM
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Yes. Just doesnt sound as powerfull anymore once its warm

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