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Discussion Starter #1
I have a 2004 GMC and for some reason i cant seem to figure out it has a surge when setting at idle and also when im setting at a light the truck wants to move when im on the brake. WTH is the problem no one around here seems to know
 

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Fuel Pressure Regulator I believe is the culprit. Somebody could confirm that.
 

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180 for the part, you can change it yourself its on top of the cp3
 

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I have the same problem and was told it was the fuel pressure regualtor as well. I haven't changed it yet though. When I started asking for prices I was told $450 for one. Can some one point to exactly what is needed?
 

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Yep its the fpr mine does it, been doin it for about 6 months now lol but you can also run 2 stroke oil or an diesel additive and it will fix it for about a week or so sometimes longer but wont fix it for good I think it sounds pretty cool while in idle
 

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try changeing your fuel filter, mine was doing this also changed it and seems to fix the issue. Now it may start doing it again later since i jinked myself.
 

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Yup fpr is goin bad. the low sulfur diesel doesnt lube it enough and causes them to fail. There are some vendors on here who can help you with one. I paid 160 to my door for mine in my lbz.
 
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