corvettedave01
Active member
- Joined
- Nov 23, 2008
- Messages
- 30
This is a very rough tune with the injectors. I think it's quit a bit too rich up top, but I got it idling pretty well. *What can I do to reduce the idle a little more?
I finally had time to mess with the vette today and found something very interesting that has been plaguing us all along.
I was able to consistently recreate the TPS issue that Chris pointed out to me a couple of times while he was dyno tuning it at Wichita Dyno. He just couldn't figure out how to consistently recreate the problem.
-Under the TPS calibration table, the tps value is consistent every time regardless of combination of actions with the throttle pedal. 0 to partial, to full, all very consistent, no problems. .47 to 3.9 volts if I remember right.
-However, in both the VE and base timing tables the following happens.
1. 0 to 100% throttle pedal is usually fine (not always, sometimes 80-90% tps when the pedal is 100%)
2. 0 to 50% to 100% pedal results in 0%-50%-70-90% TPS value on both the VE and base timing tables. I can recreate this problem consistently.
3. When I go back to check it out on the TPS calibration it is perfect with the gas pedal no matter what combination I put it through.
So...It seems that something internal in the computer is going wrong between the voltage reading of the TPS sensor, which is always correct to the posting of the TPS value on the VE and base timing tables.
Let me know what you think,
Dave
I finally had time to mess with the vette today and found something very interesting that has been plaguing us all along.
I was able to consistently recreate the TPS issue that Chris pointed out to me a couple of times while he was dyno tuning it at Wichita Dyno. He just couldn't figure out how to consistently recreate the problem.
-Under the TPS calibration table, the tps value is consistent every time regardless of combination of actions with the throttle pedal. 0 to partial, to full, all very consistent, no problems. .47 to 3.9 volts if I remember right.
-However, in both the VE and base timing tables the following happens.
1. 0 to 100% throttle pedal is usually fine (not always, sometimes 80-90% tps when the pedal is 100%)
2. 0 to 50% to 100% pedal results in 0%-50%-70-90% TPS value on both the VE and base timing tables. I can recreate this problem consistently.
3. When I go back to check it out on the TPS calibration it is perfect with the gas pedal no matter what combination I put it through.
So...It seems that something internal in the computer is going wrong between the voltage reading of the TPS sensor, which is always correct to the posting of the TPS value on the VE and base timing tables.
Let me know what you think,
Dave