whats up with this
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Joined: Apr 2005
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whats up with this
i just noticed the other day that my average mileage on the HUD was like 14mpg. So i looked at the instant mpg and it seemed normal. The gas gauge doesnt seem to be reading wrong either. i did just put a LS6 intake with injectors but that shouldnt cause that should it?
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Originally Posted by XCLR8N
i just noticed the other day that my average mileage on the HUD was like 14mpg. So i looked at the instant mpg and it seemed normal. The gas gauge doesnt seem to be reading wrong either. i did just put a LS6 intake with injectors but that shouldnt cause that should it?
Reset the average mileage and see what it shows after a few hundred miles. If it is city drving that is about what you will get. Highway is in the mid to high 20s.
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 448
From: Atlanta metro Ga.
Wait. Hold on a minute..
LS6 manifold = good
LS6 injectors (assuming you went from 26lbsPH to the LS6's 28lbsPH flow rate) without scaling the IFR table to compensate = BAD.
IF you simple replace 26lbs injectors w/ 28lbs models, the PCM is still marinating the same injector pulse width (it doesn't know you changed the injectors), and it's dumping extra fuel into the motor..
I swapped my 26 for 28 units out of peace of mind, and to make sure I didn't run the peak injector time-on values too high with my impending mods.
If you don't want to scale the IFR table (about 9% difference.. i.e. you'll need HP Tuners, or LS1 Edit , etc.) then put the stock injectors back in the motor.
PM me if you have any other questions about this.. :cheers
LS6 manifold = good
LS6 injectors (assuming you went from 26lbsPH to the LS6's 28lbsPH flow rate) without scaling the IFR table to compensate = BAD.
IF you simple replace 26lbs injectors w/ 28lbs models, the PCM is still marinating the same injector pulse width (it doesn't know you changed the injectors), and it's dumping extra fuel into the motor..
I swapped my 26 for 28 units out of peace of mind, and to make sure I didn't run the peak injector time-on values too high with my impending mods.
If you don't want to scale the IFR table (about 9% difference.. i.e. you'll need HP Tuners, or LS1 Edit , etc.) then put the stock injectors back in the motor.
PM me if you have any other questions about this.. :cheers
Last edited by Dan_the_C5_Man; May 10, 2005 at 11:26 AM.
