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DTC Code help please

  • Thread starter Thread starter oldtexasdog
  • Start date Start date Jul 6, 2010

oldtexasdog

New Member
Apr 27, 2010
23
0
1
Jul 6, 2010
#1
  • Jul 6, 2010
  • #1
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 no whine.
 

SpartaPerformance

10 Year Member
Nov 5, 2006
2,517
61
89
Long Island NY
Jul 6, 2010
#2
  • Jul 6, 2010
  • #2
If the light came on after installing the tune then there is an issue with that tune.
 

oldtexasdog

New Member
Apr 27, 2010
23
0
1
Jul 7, 2010
#3
  • Jul 7, 2010
  • #3
Should I raise the richness up one notch on the tuner?
 

SpartaPerformance

10 Year Member
Nov 5, 2006
2,517
61
89
Long Island NY
Jul 7, 2010
#4
  • Jul 7, 2010
  • #4
No contact whoever you got the tune from and let them know, they should send you a new tune.
 
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