TimberJack Posted April 14, 2020 Share Posted April 14, 2020 2008 chu when you turn key on you can hear the actuator making a clicking noise. Well truck lost boost and no engine brake showed code for actuator. Took an had it replaced did great for about 2 days. Back to making the clicking noise while key is on. I checking connections to make sure pins weren’t loss. Even Check ones coming out of firewall. Started truck up ran great, next day back to the same ol shit. Sounds like it’s losing power and regaining it. Is there a relay for actuator? Quote Link to comment https://www.bigmacktrucks.com/topic/62060-mp8-turbo-actuator-problems/ Share on other sites More sharing options...
fjh Posted April 15, 2020 Share Posted April 15, 2020 (edited) No but it sounds like the turbo maybe sticking! Replacing the actuator will not help if the cone / vanes are sticking inside the turbo usually the turbo needs replacing ! Edited April 15, 2020 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/62060-mp8-turbo-actuator-problems/#findComment-448818 Share on other sites More sharing options...
TimberJack Posted April 15, 2020 Author Share Posted April 15, 2020 I pulled the actuator and the lever moves freely. It’s got me puzzled, it running fine this morning. Quote Link to comment https://www.bigmacktrucks.com/topic/62060-mp8-turbo-actuator-problems/#findComment-448834 Share on other sites More sharing options...
c-mac Posted May 14, 2020 Share Posted May 14, 2020 (edited) On 4/14/2020 at 6:13 PM, TimberJack said: 2008 chu when you turn key on you can hear the actuator making a clicking noise. Well truck lost boost and no engine brake showed code for actuator. Took an had it replaced did great for about 2 days. Back to making the clicking noise while key is on. I checking connections to make sure pins weren’t loss. Even Check ones coming out of firewall. Started truck up ran great, next day back to the same ol shit. Sounds like it’s losing power and regaining it. Is there a relay for actuator? there is a fuse in the drivers side fuse block by your left foot. I dont remember which one but if it is making noise the fuse is probably ok. I cant If the acuator makes noise continuously Move the harness around to the actuator and see if it changes anything. the pins in the round connector can look fine but still be bad. Edited May 14, 2020 by c-mac Quote Link to comment https://www.bigmacktrucks.com/topic/62060-mp8-turbo-actuator-problems/#findComment-451113 Share on other sites More sharing options...
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