Interesting, I've only seen this truck ever sweep once. The sensor is a second replacement sensor from fleece as the one shipped with the turbo failed to reach 100% in the sweep. Not sure what brand they send, it has a white insulating sleeve on it.Originally Posted by TAG DIESEL
It could just be once. I don't have the procedure right in front of me , just going off of memory. The best sensors are made by Garrett. Also , what type of air intake do you have ? Did you ever set this code with the factory turbo ?
I will tell you that I have had a handful of sensors "bad " out of the box in my time as a tech. The rule is when manually sweeping the vanes , the actual position cannot be more than 2% off of the desired or commanded
It does one sweep and you should hear an audible change in the exhaust tone. Yes I have also had bad new out of the box sensors as well as counterfeit.
No luck today with anyone local to me to do a relearn, I'll try to call some other shops in the area to do a turbo relearn tomorrow. Or know any decently priced scanners to command this? I have seen used tech 2's occasionally but there still kinda spendy.
Depending on your budget, Amazon has some good prices on autels under 1k
I have an appointment this friday at the dealer to have the TC Learn performed, will update with results.
Just an update the dealer did a TC relearn and it is no different then the trucks self learn everytime it starts, no change to initial turbo spool. I also had the tech command vane positions from 0 to 100% and the actual and desired were right on top of each other. Really looking like this cheetah has an issue in the clocking/indexing of the vane position as described here in this tech article. https://www.dieselhub.com/maintenanc...-indexing.html
Or the cheetah turbo doesnt spool anywhere near as good as a stock charger. I will be pulling my 33 foot camper this weekend and will see what my EGTs and boost are with load. Will likely need to pull the turbo and either have fleece look at or it fix the clocking issue myself if that is the issue.
Awesome update. Now that you have verified vane learn is 100% good we can move forward. Interested in the clocking issue as I feel vanes would show that
Pulled camper okay if I kept my foot out of it. Lower rpms were low on actual boost, high rpms made proper boost setpoint, but vane tables are bumped up to reach that. EGT while pulling 8k lbs on the flats at 60 mph were from 1000 to 1100f, and 1200+ climbing hills (very small hills I'm in NW MN). My stock turbo was cooler then this one when the vanes werent sticking. Thinking I'll be pulling the turbo soon. Will update when I have more.
That's insane for a turbo that's supposed to support 600+. Hopefully you can get fleece to send you a replacement. Just make sure you've got documented all you've done so they don't fight back to much.
Finally got the turbo pulled, as far as I can tell I have the vanes moved to a "fully closed position according to the actuator, but using a bore scope I can see a gap between the vanes. Will get it sent back to fleece and see what they find.
Reply With Quote