can your L.T.F.T. closer to 0 give you better fuel econonmy? I mean if you L.T.F.T. are at say 20% and you get them closer to 0 would you see improved fuel econonmy?
can your L.T.F.T. closer to 0 give you better fuel econonmy? I mean if you L.T.F.T. are at say 20% and you get them closer to 0 would you see improved fuel econonmy?
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
Are your LTFTs 20%, or is this a hypothetical question?
High LTFTs cause AFR to be whacked.
The easiest way to find out is to log WBO2 and see how BENs are in CL.
For me, BENs are between .99 to 1.02 with LTFTs averaging -2%,
being a little lean from idle to 1200 RPM.
LTFTs that high could be an intake or exhaust leak.
512k RoadRunner Firmware 12.14R
FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
LC-1 WBO2
_________________________________________________
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
just check for an intake leak and it turned out negative, there is not a intake leak. The truck runs fine no hesatation or stalling just the ltft are around 20% here is a scan i ran
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
Any mods to the truck?
I don't know if it is normal for a truck to have high LTFTs but
it would go against common lore of having LTFTs 0% or slightly negative.
512k RoadRunner Firmware 12.14R
FlashScan V2 Bootblock V2.07.04 Firmware V2.07.22 EFILive V7.5.7 (Build 191) V8.2.1 (Build 181)
LC-1 WBO2
_________________________________________________
I had just worked on a 2000 Camaro that had those type of LTFT's and it was an exhaust leak that looked very small but caused the trims to be out of wack. An exhaust leak is not as easy to find sometimes.
98 tigershark
98 tigershark
L92/427 w/L76 CC'ed heads n upgraded springs
4.100 stroke, 4.068 bore w/ 11:1 comp
Cam, 591 int, 613exhst, 232-246dur@.050, 115*
LG headers, High flow cats,
RPM level 5 trans, RPM 3.42 gears, 2800 rpm trq convrt. .
Special Thanx to Joe and Bruce!
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro
That could affect the LTFT and STFT as they are both OBDII issues.
I have heard of that before. Do you know what to do to fix the problem. It could be a bad sensor or even a bad fuel cap. It is hard to tell but again I have heard of this effecting the fuel trims but have not seen this personally.
Regards,
98 tigerhark
98 tigershark
L92/427 w/L76 CC'ed heads n upgraded springs
4.100 stroke, 4.068 bore w/ 11:1 comp
Cam, 591 int, 613exhst, 232-246dur@.050, 115*
LG headers, High flow cats,
RPM level 5 trans, RPM 3.42 gears, 2800 rpm trq convrt. .
Special Thanx to Joe and Bruce!
have you ever heard of this decreasing your fuel economy? Or does this not affect fuel economy? I beleive it is for fuel vapars, but i really can't see you loosing any m.p.g from your evap system?? No i don't really know the problem yet, but i am trying to figure it out.
2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. ,t.c.bypass,descreened m.a.f. 232/234 .595,.598 +2 comp cam with ported and polished stock heads with .650 lift dual springs and a bowl grind. tuned with EFI Live. All combined to achieve 29 m.p.g. and 399 r.w.h.p. with 384 lbs of torque. sold...
Now own a 2015 1LE camaro