Testing TPS on 3.9

A

AncientGeek

New Member

Posts

10

Location

Cape Town, South Africa

• Jun 28, 2010

• #1

I'm testing the throttle pot on a Disco 1, 3.9 engine, 14CUX.

Various docs such as Rover 14CUX Hot Wire Mass Flow EFI: Service and Troubleshooting indicate the resistance across the 2 outer wires should be around 5000 ohms. However I measure 10x that much. Should I be worried?
Resistance across the other pairs seems to graduate smoothly with throttle movement.

 

fett

Well-Known Member

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8,637

Location

South Hampshire

• Jun 28, 2010

• #2

have you got your multimetere on the right setting?

 

A

AncientGeek

New Member

Posts

10

Location

Cape Town, South Africa

• Jun 28, 2010

• #3

fett said:

have you got your multimetere on the right setting?

Click to expand...

Its a Fluke, it auto-ranges.
Car is running rich, all sensors test ok except for this oddity. Not tested fuel pressure yet.

 

vougese39

Well-Known Member

Posts

1,039

• Jun 29, 2010

• #4

runing rich aint going to be a tps fault get the ecu fault read!
coolant temp sensor, afm, lambda sensor if fitted poor cap leads and rotor plugs faulty, internal ecu fault
guessing will cost you a lot of time and money on parts ask fet the last place to do his made a mess and it only needed cap leads and a rotor then it sowed the real fault up much latter 6 months and it was a tps but as i have said it will not effect the fueling

 

fett

Well-Known Member

Posts

8,637

Location

South Hampshire

• Jun 29, 2010

• #5

too tru , I have PM'd you stu