Hello guys ,just realised on my z the TPS reads 0.88v which i know is not good ...0.45v is the right reading but i can't get it, it only goes down to 0.88v and above, I've changed the TPS with another one just to see if i can adjusted but no luck..same as mine...now i'm thinking if is got anything to do with me converting the car from auto to manual... ??? any ideas???

Converting the car to manual wont affect the TPS setting, but the base idle will change if you havent connected the neutral wires at the ecu. So if the base idle is at 25 deg instead of 15, then the timing is raised, therefore revs are raised.

 

Have you plugged it in to a diagnostic?

 

A) Adjustment check: Using a multimeter set to Voltage, check

with all TPS plugs connected- measure between middle pin and

a chassis earth.

You should see 0.44 - 0.46V. This is the correct adjustment. If

outside this range, perform the following:

1) Set ignition key to on (don't start the engine).

2) Loosen the two TPS retaining screws (ideally using a 7mm

socket) and very carefully move the TPS slightly clockwise or

anti-clockwise until within the above desired range (clockwise

increases / anticlock decreases). The range of adjustment is

minor so don't be suprised if you move it too far in the wrong

direction.

3) Tighten the retaining screws and recheck the voltage hasn't

changed during tightening.

4) Start the engine and disconnect the three pin TPS connector

for about ten seconds. The engine RPM will increase during this

time - this is normal (if you still have the mulitmeter connected,

the voltage will also jump to ~ 5V. This is temporary and is of

no concern).

5) Reconnect the three pin connector and recheck the voltage is

still within the 0.44 - 0.46 range.

Note: you will probably need to reset the base idle also.

B) Sensor failure check: Disconnect harness and using a

multimeter set to resistance Ω, check between the middle and

lower pins on the three pin connector on the TPS side of the

harness:

o Throttle released = ~1 Ohm Ω

o Partially Released = 1-9 Ohm Ω

o Completely depressed = ~9 Ohm Ω