TimberJack Posted July 12, 2016 Share Posted July 12, 2016 04 ch613 AC 437. When I'm bobtailing truck runs great, throttle response it perfect. When I hook up to a empty log trailer truck fails on its face. Takes forever to pick up speed. It's like the truck doesn't see it has a load. Does anyone have any idea? Thanks Quote Link to comment Share on other sites More sharing options...
ardakota Posted July 12, 2016 Share Posted July 12, 2016 my 04 will do that when the fuel filters start to get stopped up. We also had problems with the turbo actuator not working right is it throwing any codes? How high is your exhaust temp. Also can check for leaks in your intake boots. Quote Link to comment Share on other sites More sharing options...
TimberJack Posted July 12, 2016 Author Share Posted July 12, 2016 New fuel filter, and just installed and new turbo and intercooler. I sprayed everything down with soapy water and seen no leaks. I did have one code 4-9 with is the EGR valve. Came on while sitting at red light then as soon as I touched throttle went off and hasn't came back up. Quote Link to comment Share on other sites More sharing options...
TimberJack Posted July 12, 2016 Author Share Posted July 12, 2016 I wonder if there's anyway to up the fuel pressure Quote Link to comment Share on other sites More sharing options...
steeler Posted July 14, 2016 Share Posted July 14, 2016 I would check boost and fuel pressure with a manual gauge if it were me. 1 Quote Link to comment Share on other sites More sharing options...
TimberJack Posted July 15, 2016 Author Share Posted July 15, 2016 That's on the to do list for the weekend lol Quote Link to comment Share on other sites More sharing options...
luckypanther Posted July 16, 2016 Share Posted July 16, 2016 Have you checked for any inactive faults logged? some times a vehicle speed or timing sensor fault can be active intermittently and for some reason you wont get a lightning bolt. Quote Link to comment Share on other sites More sharing options...
Random999 Posted August 6, 2016 Share Posted August 6, 2016 (edited) Go to the dealer and have them hook up a laptop to confirm that your software package is at least step 12 B or higher. If not have them reflash your ECM with updated software. Edited August 6, 2016 by Dugan5029 Quote Link to comment Share on other sites More sharing options...
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