Help with tune, car lean :/
08-20-2013, 05:16 AM
#1
Help with tune, car lean :/ Would anyone be willing to look through my tune and data logs to see if they can see anything out of the ordinary?
Getting lean codes and after lots of driving it was difficult to take off from red lights. Changed to Bosch O2 sensors and that made it worse, went back to my AC Delco's. Car has no rear O2 sensors.
Car has TR 224 cam, Ford 30lb/ hour injectors, new stock maf, original delco O2's, Granatelli 255 liter/hour pump, ported TB, ported intake.
40lbs fuel pressure at key on, 50lbs fuel pressure when at idle.
98 camaro test drive.hpl
98 camaro.hpl
tune 98 camaro z28 224 t cam.hpt
Getting lean codes and after lots of driving it was difficult to take off from red lights. Changed to Bosch O2 sensors and that made it worse, went back to my AC Delco's. Car has no rear O2 sensors.
Car has TR 224 cam, Ford 30lb/ hour injectors, new stock maf, original delco O2's, Granatelli 255 liter/hour pump, ported TB, ported intake.
40lbs fuel pressure at key on, 50lbs fuel pressure when at idle.
98 camaro test drive.hpl
98 camaro.hpl
tune 98 camaro z28 224 t cam.hpt
08-20-2013, 11:14 AM
#7
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Fuel pressure is fundamental and needs to be in spec,
the PCM has no way to sense or compensate for it.
Fix one problem at a time and don't go fluttering around
changing a bunch of stuff at once.
the PCM has no way to sense or compensate for it.
Fix one problem at a time and don't go fluttering around
changing a bunch of stuff at once.
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08-21-2013, 04:54 AM
#10
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No he means stick with fixing the fuel pressure only. Gauge installed, key on fuel pressure reads. Key off, repeat, what does the gauge read....? What does the gauge do? How fast a drop? This is what needs to be addressed first.
08-22-2013, 11:56 AM
#13
Dying pump, poor power supply or a cracked hose possibly in tank will also cause low pressure. The aeromotive 340 stealth pumps are killer for the price. Just in case you need to swap it out. Mine over a two week period produced progressively less and less pressure until I could barely idle at 8 psi of pressure.....yes 8. Pumps fixed it real quick.
08-22-2013, 12:34 PM
#14
"after lots of driving it was difficult to take off from red lights." this definitely sounds like a dying fuel pump.. its getting hot after prolonged use. change it before it leaves you stranded.
08-25-2013, 09:41 PM
#15
Got a racetronix that should be here Tuesday.
At idle you can watch it start at 40 and just slowly work it's way down.
O well. It could be worse!
Now my car should have power and quit running. 39 deg timing and 25% injector duty cycle.
At idle you can watch it start at 40 and just slowly work it's way down.
O well. It could be worse!
Now my car should have power and quit running. 39 deg timing and 25% injector duty cycle.