Hello

How can I test if my pink fuel relay work?
and how can I test throttle position senson?
thank you

 

To test the TPS the stick a continuity meter on it between two of the pins when the throttle is closed (think its the middle and bottom) you should get a circuit.

When you open the throttle fully it should break the circuit and link up the middle and top pins.

I had this problem at the begining of the week. 2 out of 3 were faulty.

 

oh, thats some good advice.

Who told you that

 

ok, I discconect TPS, and put ohm meter betwen two pins, I dont remember but about few Ohm was reading. I push throttle, and still same reading. ???

question 2: when i mounting TPS must I hear "click" when I relase throttle fully??

 

Easiest test of the fuel pump relay is to fit it into the car & if the pump primes when you switch the ignition on then it's working.

 

ok. when I get contact by turning key, my pump make bzzzzz, is that mean pump relay is ok?

and here are one picture, for qouestion about throttle position sensor.



http://i115.photobucket.com/albums/n...0/RSTprobl.jpg


THANKS

 

Yup. The buzzing is the pump priming the system..which is good. Which means the relay is good also
By the way..if you switch the ignition on & off quickly in succession, the pump will not prime continuously..there has to be a small time gap for it to re-prime. This is normal and is not a fault.

 

ok. thanks

and what with throttle position sensor?

 

Shawn, a priming fuel pump relay doesnt mean its working fully, ive seen numerous relays that will do just one or the other.

Now.......your TPS. It has basically 2 switches inside. With the throttle fully closed (it should click as soon as the throttle is opened the smallest amount), you should get continuity across one switch.

Then hold the throttle fully open, there should be continuity across the other switch.

There should be no continuity between any pins if the throttle isnt fully open or fully closed.

 

P.S sorry my diagram isn't quite as good as yours

 

thanks

 

Well you're never going to get a reading from the throttle position sensor if you're trying to test it through the loom you have just disconnected from it!!!

 

Didn't know that. So it may work enough to prime but not to allow normal operation?

 

See this guide for fuel pump relay testing:

http://forum.fordsierraclub.co.uk/viewtopic.php?t=18853

 

rs shawn, basically yea.

To prime it needs 12v from the ignition. To run with the engine it has to see the LT from the coil.

Usually they stop priming, but will still run the car. Its not a massive problem when they do this but can make starting from cold difficult.

This is only really on the pink relays though, why oh why Ford reverted back to the pink ones from the Series 1 relay i will never work out

 

And im either blind, stupid, or that link doesnt say anything about testing relays.

 

Thanks SafeChav

 

It is part of the Fuel Pump section.

 

Stupid then