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Old 12-12-2010, 07:44 PM
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05 ford f250

05 ford f250 6.0l I have a bully dog on my truck trouble code po487 keeps coming up on the diagnostics and sometimes the turbo wont build pressure untill I smash the peddle to the floor then it slowly bulids pressure to about 15psi then it dumps it. I was wondering if the egr is to blame and should i do an egr block or is the turbo going bad. thank you

Last edited by Brandon R; 12-12-2010 at 07:56 PM.
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Old 12-13-2010, 04:32 PM
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Look at your EGR valve. Take it out and see if there are any coking deposits on it. Sometimes deposits will get lodged in the EGR valve when its open and not allow it to close properly, leaving it partially open. Also, check down in the EGR hole to see if there is a lot of deposits. If so, you will need to do what they call "decarb" process which takes about 2-3 hours and basically steams all the deposits out, and then you change you oil to get rid of any excess remains. P0487 is evidently a code strictly for programmers/chips bc it is not listed in the Ford service manual. It will cause boost problems. You can try taking the EGR valve out and starting it with it out and revving it up to blow some of it out also. I'd return the bullydog to stock and see if that helps. I work at a Ford dealer and we dont work on trucks with chips/programmers due to the fact that it screws with the diagnosis and technically its supposed to void your warranty. sometimes if you go to reflash something to fix a problem and it has mods like that on it, it will usually make it worse. post back with results. Hope this helps.
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