c-mac Posted June 10, 2016 Share Posted June 10, 2016 I have an 08 Pinnacle chu mp8 . when running the the secondary air pressure is 150psi on the gauge and the warning light on the gauge is on. with the engine off I can bleed the tanks and pump the brakes until there is no air. and sec air only drops to 50psi. either there is a sensor that I dont know of bad or the gauge is bad. the gauge is built into the cluster assembly. There has to be a sensor somewhere. can you help? I have no manual! Quote Link to comment https://www.bigmacktrucks.com/topic/45595-secondary-air-gauge-starts-at-50psi/ Share on other sites More sharing options...
turckster Posted June 11, 2016 Share Posted June 11, 2016 I can't remember but I think the primary and secondary air sensors are located in an air manifold right above the throttle pedal. The wiring might be tagged what circuit it belongs to. Quote Link to comment https://www.bigmacktrucks.com/topic/45595-secondary-air-gauge-starts-at-50psi/#findComment-336190 Share on other sites More sharing options...
c-mac Posted June 12, 2016 Author Share Posted June 12, 2016 found it. Bad sensor and it was tagged. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/45595-secondary-air-gauge-starts-at-50psi/#findComment-336351 Share on other sites More sharing options...
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