3rd gen tune up question

Sorry, but what do you mean by cel.

 

Sorry, but what do you mean by cel

 

C- check
E- engine
L- light

 

Never cleared it. Came off by itself.

 

OP.....

How are checking your fuel mileage?

I hope you're not trusting the ID10T light in the dashboard. Those are notoriously inaccurate. Using that to determine a 1-2 mpg difference is like peeing in the ocean to cause global flooding. At best, that indicator is an estimate of the fuel efficiency.

The tried and true old school method is to calculate the MPG.

 

I'll post updates once I'm through full tank, new to diy tuneup and enjoying learning process. Was told to patient when tracking fuel economy after tuneup.
Thanks to all responses, very helpful

 

yea it says that, but in reality, it does reset learned values. give it a try and check out the short and long term fuel trims with a obd reader. it will run in open loop for a while until it has enough data.

edit: it says that pulling the efi fuse will not work for the 2GR-FKS (6 cylinder) but i can confirm this works with the 2TR-FE (4 cylinder).