Right after I installed my new JLT CIA and SCTX3 Tuner, I got a check engine
light on my 08 GT. It said I was running too rich. So I did a reset and everything seemed fine-now after my 4:10 gear install, it came on again only this time it was for too lean? I reset it again, but is there something else I should be checking?
On a side note with the new 4:10s there seems to be a "clunk” between first and second and a rattle (not sure if that’s the right word) when I go over some rough road coming from the rear. Just not as tight, and quite as it used to be? I will crawl under and re-check all attachments, but just wondered if anyone else had experienced either of these problems their selves?
Thanks to all for your input.
P.S. The 4:10s are GREAT