C-10 power problems

Message Title: Message Text:  http  https  ftp  mail    hr     highlight   LI   Quote  Select Emotion SmileWinkSadEmbarrasmentDisgustedBig GrinMadShockedTongueCoolFrownConfused [q]40 psi at idle sounds low, fuel system should always maintain 70 or better. This issuie alone should not cause low power if it indeed is holding 70 under load. Hook up ET and put under load. View Rated fuel position, Afrc position and desired fuel position. If you do not have an air problem AFRC fuel position will move up to or above rated, which means the Ecm is giving the engine max fuel, so it should make power provided it is not starving for fuel and everything else is functioning. If it is below you are not making enough boost. The ecm will not fuel up the injectors if it does not see the correct boost, this prevents black smoke. I have seen sensors plugged in incorrectly as the will fit cuase this sort of problem also. Go around and unplug them 1 at a time look for the code and verify that is the correct sensor. I have never seen a Ecm cause low power. I am leaning towards something u did or a symptom u r missing.[/q]

HTML code is not permitted. Special symbols permit some HTML functionality.