Lean :(
Lean :( I been using my HPtuners, doing alot of logs, and Ive found that Im running super lean. Im starting to wonder if maybe this new RaceTronix pump has anything to do with it. I do have a fuel pressure guage, but its under the hood on my fuel rail.
My question is, if I rev up the engine and have someone look at the pressure guage, is that the same as how it would perform under load in driving conditions?
My question is, if I rev up the engine and have someone look at the pressure guage, is that the same as how it would perform under load in driving conditions?
i noticed the same thing on mine.. mine was reading 22's on the lean side !!! haha i said **** it and threw it in speed density and it immediately fixed it... have you tried playing with your MAF calibration tables??? that is what was throwing mine off but i like speed density and dont plan on worrying about the maf anymore 
Originally Posted by aNuBiS
I been using my HPtuners, doing alot of logs, and Ive found that Im running super lean. Im starting to wonder if maybe this new RaceTronix pump has anything to do with it. I do have a fuel pressure guage, but its under the hood on my fuel rail.
My question is, if I rev up the engine and have someone look at the pressure guage, is that the same as how it would perform under load in driving conditions?
My question is, if I rev up the engine and have someone look at the pressure guage, is that the same as how it would perform under load in driving conditions?
I really dont know what to point my finger at anymore. I noticed today, that STFT's and LTFT's are both almost around -2 to 0 with me running maybe 4% tps, but the second I let off the gas, the LTFT's go way up to like 11 to 17 whereas the STFT's stay relatively low. Same as when Im going WOT everything goes way lean.
Also to note. The injectors I bought are I believe 37# racetronix delphi's. Which are rated
Static Flow Rate: 37.27 lb/hr @ 43.5PSI (300kPa) or 282gm/min
Static Flow Rate: 43.04 lb/hr @ 58.0PSI (300kPa) or 326gm/min
Well my fuel pressure guage at idle is somewhere between 60-65psi, and yet so far the only way Ive gotten my LTFT's to act somewhat normal like they are now, was to change my injector table to start at approx~ 36# at 0MAP and its scaled up to 43# at 80MAP.
I had them scaled from like 43# at 0MAP to 47# at 80MAP like the chart out there says and it was running super lean like 25+ and it was backfiring, etc etc.
Is there maybe something else I have to change as far as these injectors? Like the pulse width, does it matter that these are high impedance?
Would a vacuum leak cause this? What things could you suggest would possible cause this? Or should I just put them back to 43 to 47 like the chart says and start tunning my VE ?
Also to note. The injectors I bought are I believe 37# racetronix delphi's. Which are rated
Static Flow Rate: 37.27 lb/hr @ 43.5PSI (300kPa) or 282gm/min
Static Flow Rate: 43.04 lb/hr @ 58.0PSI (300kPa) or 326gm/min
Well my fuel pressure guage at idle is somewhere between 60-65psi, and yet so far the only way Ive gotten my LTFT's to act somewhat normal like they are now, was to change my injector table to start at approx~ 36# at 0MAP and its scaled up to 43# at 80MAP.
I had them scaled from like 43# at 0MAP to 47# at 80MAP like the chart out there says and it was running super lean like 25+ and it was backfiring, etc etc.
Is there maybe something else I have to change as far as these injectors? Like the pulse width, does it matter that these are high impedance?
Would a vacuum leak cause this? What things could you suggest would possible cause this? Or should I just put them back to 43 to 47 like the chart says and start tunning my VE ?
Last edited by aNuBiS; Aug 4, 2006 at 12:05 AM.
