Biggsw784

iTrader: (9)

I had my 706 heads milled down .035. Now my long term fuel trim is around 20-25% on bank 1 and 12-16% on bank 2. I have checked everywhere for vacuum leaks and nothing is found. Curious if the intake may have a leak at the bottom of the runners because the heads sit .035 lower then before. Has anyone had or heard of any issues with this?? Is there some type of intake spacers availble or what?? Dont know what else to do?? Any help is very appreciated.

sickREDsierra

iTrader: (17)

not really possible unless the heads were milled incorrectly, as in, not flat/true.

if they are uneven you will get an air leak causing fuel trims to be all over the place. a header leak can also cause a small variance.

you may want to get yourself a set of feeler gages and run them between the head/block with the heads unbolted, and see if you have any strange gaps to speak of..