Large idle surge when coming to a stop
No i don't have a log/tune to post yet.
I normally deal with gen3/4 stuff.
I am asking for help on what to scan in order to post a quality log here to help figure out my issue.
This vehicle has been tuned 3 years ago and for some odd reason has in the last 6 months or so started this huge leap/surge in rpm when coming to stop.
I know what i would look for and how to set up the scanner for earlier engines, but asking for help with this gen 5 engine.
When driving down the street lets say 45mph street light turns red, you slow down not hastily, just normal driving, when you get to about 5mph the engine will shoot up to about 2000 rpms like you blipped the throttle. Now if youre close to the person in front of you, you can hit them if youre not careful. The idle will the surge again and engine usually dies.
This does not happen on every deceleration, but its common enough i have to be cautious when coming to a stop.
Other than deceleration, any other time this big idle surge is not there.
2014 5.3, decent sized street cam, no AFM, head/exhaust work, 6.2 intake/throttle body etc.
Thank you for any help on what the gen 5 needs in the scanner to get a correct log to look at.