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Old 05-09-2011, 03:03 PM
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hpop question

how does one know if they need to replace their hpop? my truck runs alittle rough and at speeds between 50-60 real light throttle it surges some. iam gonna try to see if seafoam will help it. might just have an injector problem not sure. i was merging on interstate by myself late last night and guy wouldnt let me in so i slowed he slowed so i punched it and so did he, i barley made it in front of him but he was all over my bumper. i just stayed in the right lane so he could pass but he wouldnt we were the only ones on the road. so anyway i floored it to try to get away but didnt happen my truck toped out about 95 mph, thought maybe it had alittle more but didnt stay in it long. truck is 02 cc all stock. the tach said about 2500 rpms and when it got to 90 it felt flat like that was it. i have never pushed it that hard before dont like running my truck like that. does that sound about right performance wise though? thanks guys inadvance oh and that guy followed me for about 5 miles, we were on open interstate, he must have been drunk. i signaled when trying to merge on freeway and all, just cant make some people happy i guess

Last edited by turbosuzuki; 05-09-2011 at 03:36 PM.
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Old 05-09-2011, 03:30 PM
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Sea-foam= Bad for HEUI!!!
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Old 05-09-2011, 03:35 PM
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thanks for reply but what does heui mean? sorry my first diesel and had it for only a couple weeks now.
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Old 05-09-2011, 03:41 PM
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Hydraulicly actuated, Electronicly controlled, Unit Injector. Basically a 7.3 and 6.0 powerstroke use high pressure crankcase oil to create pressure inside the injectors. From my understanding sea-foam will damage the pump or injectors from the high pressure (upwards of 3,000 psi.)
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Old 05-09-2011, 03:56 PM
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ok man thanks for the headsup . guess i need to figure something else out then.
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Old 05-09-2011, 04:03 PM
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If you have factory tuning then your probably hitting the speed limiter at 95. As far as your "surging" your best bet is to locate a quality scanner and see if anythings amis. You might want to check out you APPS (accelerator pedal position sensor.) Whenever mines going out it seems like it "surges" when I'm holding a stedy pedal pressure. I've had moderate luck spraying some PB blaster on the sensor to bring it back a little, but its hard to tell what is your problem without actually being there/
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Old 05-09-2011, 04:18 PM
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thanks again man i dont know anything about these trucks so i will have to find a shop to bring it to and have them scan it.
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Old 05-09-2011, 05:57 PM
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well i just poured the seafoam in the tank and drove about 80 miles and havent noticed any difference. my buddy has the same truck but exhaust chip intake and some other mods and it seems quieter than mine, meaning just clatter from the motor, its driving me nuts. between 40-60 if i put it under the slightest load it gets loud

Last edited by turbosuzuki; 05-10-2011 at 10:42 AM.
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Old 05-10-2011, 10:43 AM
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any other ideas guys?
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Old 05-10-2011, 10:49 AM
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Yea, When i have my tune all the way up, and i barely touch the throttle, i get a loud clatter from under my feet/back of the motor and it starts to go away under heavier throttle.

And oh, Your not supposed to use Sea-Foam in the Oil, Or just stay away from it completely?
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