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Old 02-24-2012, 04:32 PM
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won't boost up

I just picked up a '99 Lariat 7.3. It runs fine just putting around, but it won't boost up properly. As long as you're just driving normally you don't really notice, but if you floor it to pass someone there is just no extra power. It doesn't smoke or make any weird noises. No blowby in the engine either. My buddy is a Ford tech, but usually only works on 6.0s. He dropped the tank and replaced the in-tank sock and says he checked the turbo as well. He doesn't know what else to do without throwing parts at it. Said the fuel pressure at the engine is fine as well.

Ideas?
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Old 02-24-2012, 04:36 PM
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sorry, just realized this should be in the 99-03 forum. mods please move. thanks
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Old 02-24-2012, 04:49 PM
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I've heard of the waste gate actuators going bad or breaking. Mine sort of does the same thing. Has a lag before it boosts up. I just ordered a new one from diesel site. I'll let you know if it makes any difference.


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Old 02-25-2012, 02:44 PM
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Thanks, keep me posted. Also, I noticed today that it will boost up fine when cold, but after about 10 miles and it gets fully warmed up it will not boost up. made a vid

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