Buying a 6 spd

[oab_au]

Originally Posted by TomsSVX

Just for the record, the ECU sees a signal at the N & P pins only when there is voltage at them. So if there is no +v to the pins the ECU assumes a P or N state. The fueling *may* be different at start-up but the loaded maps are still the same

Tom

Well if it is just for the record, we had better get it right.

The ECU holds the N and P pins high at 5V, the Inhibitor switch pulls that input low(no voltage) for P or N. If both P and N inputs are high, the ECU assumes that the car is in gear.

Harvey.

[Dessertrunner]

Harvey I agree that the ECU thinks the car is in gear but the ECU decides to start engine based on the engine spining over. In my opinion my SVX takes about 30 seconds longer to start then the ones with Auto but it still starts no problem. I think the N & P pulling the ECu low has more to do with the idle etc then the actual starting of the engine.
Tony

[oab_au]

Originally Posted by Dessertrunner

Harvey I agree that the ECU thinks the car is in gear but the ECU decides to start engine based on the engine spining over. In my opinion my SVX takes about 30 seconds longer to start then the ones with Auto but it still starts no problem. I think the N & P pulling the ECu low has more to do with the idle etc then the actual starting of the engine.
Tony

Yes it has to get a number of pulses from the crank/cam sensors before turning the spark and injectors on, but 30 seconds is a lot of time before it fires.

Harvey.

[Dessertrunner]

Might be guilty of slighting emblishing, in reality it hardly noticiable.
Tony

[TomsSVX]

Originally Posted by oab_au

Well if it is just for the record, we had better get it right.

The ECU holds the N and P pins high at 5V, the Inhibitor switch pulls that input low(no voltage) for P or N. If both P and N inputs are high, the ECU assumes that the car is in gear.

Harvey.

Might want the check that again. The Pinouts show that at 0v w/ the ingition switch foward the ECU assumes both N and/or P and when a +V of 8v is present the ECU assumes an "in gear" position. Now the starting circuit requires use of the inhibitor switch to create a closed circuit to start, this is why we do not need to wire anything to the ECU to start the car properly when converting to an MT but we do need a switch to close the starting circuit.

Tom

[oab_au]

Originally Posted by TomsSVX

Might want the check that again. The Pinouts show that at 0v w/ the ingition switch foward the ECU assumes both N and/or P and when a +V of 8v is present the ECU assumes an "in gear" position. Now the starting circuit requires use of the inhibitor switch to create a closed circuit to start, this is why we do not need to wire anything to the ECU to start the car properly when converting to an MT but we do need a switch to close the starting circuit.

Tom

No need for that Tom. You have got it right, this time.

Harvey.

[McTaff]

Shameless self-ingratiating bump...

Work is about to begin, and I am unlikely to touch a damned spanner due to my lack of proximity to the car. I am employing the services of another SVX owner with a lot more experience fiddling with gearboxes than I.

I am sacrificing lug nuts, surclips and transmission fluid to the car gods.

[McTaff]

Another shameless bump:

'E' has my car, the keys, the parts and is ready to rock. Wish him luck, guys!

I can't wait!

[svxistentialist]

Best of luck McTaff.

I think a 6-speed is a good way to go.

Joe