I grooved a 2004 Dodge Caravan with a 3.3 v6. I checked the vacuum before and after the groove and it definitely made a difference.I did a code check and there was none.
I then conditioned the ECU which helped smooth it out a lot because it was very jerky after the groove. I also keep getting a EEC code all the time.
My problem is I have gone through 3 tanks of gas and haven't gotten any mileage increase.
Has anybody come across this? Does anybody have any ideas or suggestions what could be wrong?
Nathan

did you plug pcv vaccum? can you list the fuel trims long and short dan gadgetman mo.

yes I did plug the pvc vacuum. I don't know the long and short fuel trims. How do you get this info?
Nathan

If you capped the PCV then you would have seen gains, unless there is/are more leak(s) in the vac system.

I would be double-checking my work, as I overlook stuff just like everyone else. Sometimes, amazingly simple things!

Take another look at what you've done and then report back. You are bound to find it.

Ron

yes, Ron is right, but if you have access to a car scanner to read what the computer is doing look for LTFT and STFT and post the readings and I can lead you to the area to look for the problem. Also the load factor at idle this will give me an ideal where to lead you. Usually it is a vaccum problem. Dan gadgetman mo.

I checked all the vacuum lines again and found no leaks. I don't have access to a car scanner yet to check the LTFT and STFT.
Here's some pictures of the groove maybe it's not done right.