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Message: [QUOTE="speedracer1000, post: 715580, member: 2739"] trucks a 04 6.0 with warren 190/75s, powermax with batmowheel, rr, stock fuel pump. been running around on my tow tune with my 190/75s for about a year now, i finally switched it out the other night and im running erics extreme street and it picks up power but it just feels lazy now. like lazier than i remember before. it used to haze pretty good at wot now its mostly cleared up. bout half acts like its not gettin the fuel it should, so i put my scan tool on and its matching the desired icp so the oil should be good, although im curious as to why at wot its only wanting 1350 or so give or take, maybe cuz of the injectors idk. but anyway back wen i first did the 190s i put a fuel pressure gauge on it and it was holding like 60 psi wot. so i thought well good ill leave the stock pump in. hence the reason its still there. well tonight me and my buddy took it for a ride with a gauge on the windshield and its dropping down to like 28-30 wot and bout 45 half throttle. so my question is would that 30 psi fuel drop really kill that much power? like 50 rwhp or so at least? cuz on the extreme street tune my truck with the 190s runs about like my buddys truck with matts srl tune with stock injectors. what else could kill that much power, its running pretty clear so i dont think its lacking air [/QUOTE]

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