power light questions
Posted: Sun Aug 19, 2001 11:55 pm
I found this on a SVX page… do you think this will work on a sport sedan? Anyone try anything like this?
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What is the ‘POWER’ light on the dash?
The ‘Power’ light comes on when the transmission decides to use the higher-range shift map in the transmission control unit (TCU). This map allows the engine to run at a higher speed before shifting and allows the torque converter to slip resulting in more torque to the wheels for a given gear. Power mode is engaged when the TCU senses throttle opening quickly. The decision map also takes into account the current vehicle speed. The faster you’re going and the faster you press the accelerator, the easier it is to engage the ‘Power’ mode. At slower speeds you have to really mash the accelerator down, FAST.
Contrary to any other B.S. you read about ‘Power’ mode somehow changing air/fuel ratios or affecting the engine’s timing, forget it. It has nothing to do with the engine, only the transmission’s shift map. This ‘urban legend’ refuses to die just because someone without a service manual posted an e-mail stating that ‘Power’ mode added 30HP to the engine. See the engine modification section on turbos for another example of an urban legend.
The Power light also blinks the transmission fault codes.
____---____
“Forced Power Mode and Shift Tricks
The 'throttle position sensor' or TPS is used by the ECU and TCU to read the throttle opening angle. The sensor reads from +5 volts closed to 0 volts at WOT. There is a direct connector between the ECU and TCU for the circuit. You could wire a switch into the line so you could switch the circuit off. As long as the circuit is off, the TCU will stay in power mode since the transmission will assume you instantaneously floored the accelerator (and are keeping it there).
For firmer shifts, you could also do the same thing from the TCU to 'duty control solenoid' A to remove the signal. This would force full line pressure into upshifts. For 4-wheel drive 'lockup', you can disable (switch off) duty solenoid 'C', this will lock the car in 4 WD (50/50). You could probably wire all of these circuits into a single switch (say under the accelerator pedal, or tied to the ‘Manual switch"). This would be great for racing.”
http://home.mgfairfax.rr.com/svx/faq/
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<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
office" />What is the ‘POWER’ light on the dash?
The ‘Power’ light comes on when the transmission decides to use the higher-range shift map in the transmission control unit (TCU). This map allows the engine to run at a higher speed before shifting and allows the torque converter to slip resulting in more torque to the wheels for a given gear. Power mode is engaged when the TCU senses throttle opening quickly. The decision map also takes into account the current vehicle speed. The faster you’re going and the faster you press the accelerator, the easier it is to engage the ‘Power’ mode. At slower speeds you have to really mash the accelerator down, FAST.
Contrary to any other B.S. you read about ‘Power’ mode somehow changing air/fuel ratios or affecting the engine’s timing, forget it. It has nothing to do with the engine, only the transmission’s shift map. This ‘urban legend’ refuses to die just because someone without a service manual posted an e-mail stating that ‘Power’ mode added 30HP to the engine. See the engine modification section on turbos for another example of an urban legend.
The Power light also blinks the transmission fault codes.
____---____
“Forced Power Mode and Shift Tricks
The 'throttle position sensor' or TPS is used by the ECU and TCU to read the throttle opening angle. The sensor reads from +5 volts closed to 0 volts at WOT. There is a direct connector between the ECU and TCU for the circuit. You could wire a switch into the line so you could switch the circuit off. As long as the circuit is off, the TCU will stay in power mode since the transmission will assume you instantaneously floored the accelerator (and are keeping it there).
For firmer shifts, you could also do the same thing from the TCU to 'duty control solenoid' A to remove the signal. This would force full line pressure into upshifts. For 4-wheel drive 'lockup', you can disable (switch off) duty solenoid 'C', this will lock the car in 4 WD (50/50). You could probably wire all of these circuits into a single switch (say under the accelerator pedal, or tied to the ‘Manual switch"). This would be great for racing.”
http://home.mgfairfax.rr.com/svx/faq/
_____
Do You Yahoo!?
Make international calls <http://phonecard.yahoo.com/> for as low as $0.04/minute with Yahoo! Messenger.
ADVERTISEMENT
<http://rd.yahoo.com/M=178320.1566800.31 ... /yahoo-57f>
<http://us.adserver.yahoo.com/l?M=178320 ... =602844167>
To unsubscribe from this group, please send an email to:
BC-BFLegacyWorks-unsubscribe@egroups.com
zZz <http://docs.yahoo.com/info/terms/> .