Scan tool Revealed LTFT +25%
#1
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Oct 2008
Location: Cary, NC
Posts: 333
Likes: 0
Received 0 Likes
on
0 Posts
Scan tool Revealed LTFT +25%
I hooked my '00 T/A into a scan tool because of a lean bank 1 and 2 code and found my LTFT to be +25%. I think my injectors are about maxed with my .623" lift cam, LT headers, LS6 manifold, LID, and P&P TB, but havent got that code in a while, I used to get it once in a while when i took my cutout off, but now its still on even after clearing it. could it be a vacuum leak?
#3
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
Could also just be the cam and long tubes, if the
25% is only at idle and low TPS then O2 sensor
heat issues and shot-through air can make it read
lean.
Maxed injectors will only be revealed at the big
end where O2 sensors are ignored and no trimming
goes on (aside from +LTFT "residue", which is about
where you came from, not where you're at).
25% is only at idle and low TPS then O2 sensor
heat issues and shot-through air can make it read
lean.
Maxed injectors will only be revealed at the big
end where O2 sensors are ignored and no trimming
goes on (aside from +LTFT "residue", which is about
where you came from, not where you're at).
#4
TECH Apprentice
Thread Starter
iTrader: (5)
Join Date: Oct 2008
Location: Cary, NC
Posts: 333
Likes: 0
Received 0 Likes
on
0 Posts
I just looked at my fp gauge under my hood. KOEO should sit at about 60psi, i turn the key and it went up to 30psi and dropped back to zero in a second. I cranked it up and its at 27 psi!!!! WTF. is it my FP reg. in the tank?