I have just replaced my tps last night and the car was running perfect. So I decided to take it a short run to make sure everything was ok. I drove out the garage about 2 feet and all of a sudden the car starts to over fuel badly and spluttering. Could the tps being out cause the car to over fuel I replaced the tps to same place as old 1.

 

I bet it could, I think you can do a search on here to find out how to calibrate the TPS. Also worth checking the output voltage, I think it ranges from 0.5 to 4.5V

 

That's done through the ecu plug?

 

I just stuck a sharp probe in to the wire to see what voltage I was getting.


There are how to videos on you tube

 

Look at 8&9 for TPS voltage and what pin on ecu plug you need to test

 

I have checked with a voltmeter and it's out. Could this be my over fueling problem?.

 

Yes it would, and I assume it's the correct TPS?

Martin

 

It's a pf09 but I have swapped the wires round. It ran sweet until I drove it out the garage then started overfueling.

 

What ecu are you using? The standard one for an RS500?
When yes, then you need to swap back the wires for the TPS and get a PF01 TPS.
By swapping the wires the ecu now thinks the throttle is wide open.

 

No its 2wd sapphire

 

Doesn't matter as 2WD should have PF01 with the standard management.

Martin

 

I thought it could run both but outer wires swapped?

 

No, PF01 contains a switch and is open circuit at idle.

You swap the outer wires on a 2WD loom, when converting to L8.

Martin

 

Bugger

 

I have tried the old PF01 I can get .35 open but 4.33 when shut I can't get it over 4.5v. I take it this is how you find a fault in them.

 

With the throttle closed, it should be open circuit.

Martin

 

I'm not the smartest when it comes to this. What do you mean by that?.

 

Open circuit means there is no connection.

Open = 'U'
Closed = 'O'

 

Hi,
Refer to No7 in the list.... It should be 4.5v or above with closed throttle.
Not open circuit but actually 5v or shorted to the 5v supply if you want to get technical about it... lol
The switch tells the ECU to activate the idle control valve.
The TPS is on slotted mounts so you leave the screws slack and move the TPS until you get 4.5 or above with the throttle closed, then nip up the screws.
Cheers,
Gavin

 

The switch is open circuit, and the ECU references this to activate it's idle and over run strategies.

But yes the actual voltage, as you say would be 5V or slightly less and with the slightest opening of the throttle it drops to like 4.4 V or less, as the switch closes.

Martin