CM870 power loss

[Redland1]

Today my truck started to lose power to the point where I would have the pedal to the floor and it barely moved.What I did notice when this was happening was that I couldn’t hear the turbo spooling.After a while I heard the turbo spool up and the power was back.What could be the cause of this?

[Nilao]

A bad vgt air box, a bad vgt turbo, a plugged up fuel filter...so many things but if the filter was plugged that bad I'd expect a fuel pressure code....the turbo system on the 870 is not monitored so I'd suspect the turbo to be binding.

[Rawze]

got a boost gauge on it?

[Redland1]

(05-17-2021 )Rawze Wrote:  got a boost gauge on it?

I don’t,but I did just order one from Amazon.

[Redland1]

(05-17-2021 )Nilao Wrote:  A bad vgt air box, a bad vgt turbo, a plugged up fuel filter...so many things but if the filter was plugged that bad I'd expect a fuel pressure code....the turbo system on the 870 is not monitored so I'd suspect the turbo to be binding.

How do I test to see if any of those are the problem?

[Redland1]

I will say that it’s had between 3-5 Fault codes and currently 3.I have the inline but was waiting to get the laptop,but I went ahead and told my wife to get one at Bestbuy today and I should be able to see them tomorrow.

[Nilao]

Put 60 psi regulated into the actuator on the side of the turbo. Check it for full range of travel. Quick serve should have the specs for full travel measurements.

[Redland1]

(05-17-2021 )Nilao Wrote:  Put 60 psi regulated into the actuator on the side of the turbo. Check it for full range of travel. Quick serve should have the specs for full travel measurements.

I took the air line off to the actuator and tried to move it by hand but it wouldn’t move so I put air pressure to it and it moved a good amount but I didn’t hear the turbo once the rod moved down.

[Redland1]

Also tried to hook up insite to the truck but they sent me a 9 pin instead of a 6 pin.I ordered a six pin from Amazon and should have it tomorrow.