2017 silverado 5.3 stalling

[Obscenejesster]

I've heard other people report on their catch can lines being frozen and clogged. Check your hoses as well.

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[mookdoc6]

19 hours ago, jvanwinkle2 said:

I did a small 5 minute drive and put it in my garage. Put a hair dryer on it for 15 minutes and filled half a bottle as well. Mainly water. Hopefully that was my issue. It would only die when in park before. 

Jon,

 

Reposition the catch can off the Brake fluid reservoir and use bracket towards the engine to mount it AS close as possible to engine...make sure your lines going from catch can are positioned short as possible and laying on engine....this is your problem and once you do this your stalling will not happen anymore.....Yes, the 490 RPM's on the Drive idle is ridiculous and Blackbear tune is probably the way to go and have remapped up higher at full operating temperature's.... I plan on doing the latter myself as for my catch can I live in Phoenix so placement only for dumping cans was my concern.  Good Luck!

[math_10silverado]

got a little update on the truck... it almost stalled again today... saw the rpm was moving alot up and down... and it was at the same place it did it the first time... in a driveway the truck tilted to the right side... tank is full so what could be the problem... i think its almost imposible that if the catch can froze that it does it two time exactly at the same place in the same driveway... will call the dealer tomorow but im pretty sure they wont do anything since there is no chek engine light

[jvanwinkle2]

No problems the last few times driving.  Had my catch can for a few years and never had the issue mounted by the secondary battery spot. I know a lot mount them to the brake booster but I'm not a fan of that spot. If I have issues I may try that though. Appreciate the help. 

[mookdoc6]

7 hours ago, jvanwinkle2 said:

No problems the last few times driving.  Had my catch can for a few years and never had the issue mounted by the secondary battery spot. I know a lot mount them to the brake booster but I'm not a fan of that spot. If I have issues I may try that though. Appreciate the help. 

No problem....Let's not get stubborn what kind of catch can?  Having a decent Diameter hoses will almost certainly relieve the issue your having which is probably the hoses freezing up with moisture......I reckon it's cold where you live now with temperatures not seen in the years that catch can has been installed......Get er done move the can and ensure decent hoses large diameter straddling the engine all this for cold climates.

[math_10silverado]

well found out the problem the hard way... the catch can was freezing itself shut probably the upr check valve and was causing to mutch crank case pressure... we just found ou today with the dealer and for the first time oil came out of the crank case seal so first i hope its not busted and second if yes i hope it goes under waranty.... if not ill have to pay... the catch can is remove and i will instal it back at the summer and maybe change the hose with one without chek valve

[math_10silverado]

i sended a msg to upr and they say it had to be empty more often but it were never full... look like they wont hadmit the chek valve can froze

[Dnt]

Great story and thanks for coming back to confirm that it was the catch can. What does a dealership do when an aftermarket part causes unintended problems? Do they flag your warranty in the system and deny your warranty claim if there is some real engine problem later on? 

[math_10silverado]

i dont think they will do they told me to put the truck back to stock and chek if the crank seal leak again if yes they will changed it so i think im safe... im just wondering if i keep the valve cover vent hose to the intake and put only the two dirty side line to the catch can even if the can freeze i should not have problem with too mutch pressure in the crank case am i corect?