As above really,whats the difference between the 2 electronicaly,they look the same,fit the same,i know they have different part numbers,can u interchange them??

Cheers.

 

They work in reverse to each other i beleive....a 4x4 tps on a 2wd loom will need the outer 2 wires swapped round.

 

As above, PLUS you can change all the wires you want , a PF09 4x4 TPS won't work on below a L8 Ecu

 

Indeed...forgot that bit

 

What do you meen by wont work??car wont run,not driveable??

Thanks.

 

I think it'll run just about, but like a bag o' shite (and wouldn't drive well or be good for the engine), as the sweep for the TPS is in reverse.
so the signals the ECU gets are wrong.


The scenario's for use are:

2wd Cosworth, 2wd loom (outer wires swapped) & PF09 (4x4) TPS, L8/P8 ECU

2wd Cosworth, 4wd loom & PF09 TPS, L8/P8 ECU

4wd, 4wd loom & PF09 TPS, L8/P8 ECU

HTH

Bill

 

For the archives:

The PF01 TPS fitted to level 1, 1a and 6 Ecus's are open circuit at idle.

The PFO9 TPS fitted to levels 8 and P8 are NOT open circuit at idle.

The software requires the correct TPS info to bring the engine decent idle, overun, very light throttle and cold start performance using its corresponding mapped strategies for these conditions.

If the wires are just swopped around and the inverse sensor used...
L1, 1a and 6 will think the throttle is slightly open at all times and run suspect with poor idle, cold running, overun etc.

L8 and P8 will see a sensor error due to open circuit sensor and may drop straight into limp home mode at worst or at best run with a high idle speed.

The same errors as above can be caused by an incorrectly Adjusted TPS as well.

Phew.. its been a while chaps.

 

good info Stu!
just to complete the picture for the archives, how about a nice description of how to correctly adjust each? pretty pleeeese..?

 

stu, how acurate does the tps sensor need to be set?

when i changed mine a couple weeks ago i couldnt get the sucker to give the right readings if i had .5v at idle like it was ment to be then at full throttle it would ony give around 5.2-5.3v
so i set it to around .7v at idle and then i get 5.5v at full chat. seems to run fine but just wondering i spose

 

Okay Rich.. you never were one for incomplete info pal

PF01 ONLY
Disconnect the ecu multiplug from the ecu itself and then with a multimeter:

Pin 1 of ecu connect your negative probe.
Pin 17 of ecu connect your positive probe.

Adjust the sensor until it is just open circuit and ensure it drops to a reading the moment the throttle is moved, but be certain it always goes open circuit with the throttle released.

PF09 ONLY
Plug the ecu multiplug back into the ecu and turn on the ignition.
Adjust the sensor to read <0.35volts at idle position.

 

can we not have this in the tech section listed as TPS adjustment to help the search ect

same with spark plug gaps ect ect ect

 

stu, for the thick coont like myself can you please elaborate on 'open circuit' what voltage reading should i be getting at idle?

 

Hmm,interesting,my engines fitted with a escort ybt throttle body with its pfo9 tps and idle valve,but running 2wd l6 ecu??seems to run and idle ok.
Bit more investigation required me thinks.

Cheers.

 

may be a l8 ecu in a l6 case m8

 

....or do what i did and set up on the Pectel monitor

 

Ye could b,is there any way of identifying which is which

 

take the ecu lid of and the l8 runs a baby board inside wher as the l6 dont its ony a single board in a l6 twin board in a l8

 

I know what you meen mate,like a little 2in ish size board that sits in the corner above the main board,if thats it i know for deff my ecu asnt got one.

Cheers.

 

even that isn't definitive though... it is possible to run a L8 with a chip plugged directly into the main board like L6... (won't be the same chip as would run in the babyboard though )

 

Darren, on PF01, whilst the pot wiper is "open circuit" there will be no resistance reading between ECU pin 17&1 (unplugged) - ie the meter will read 'overrange' . As the throttle starts to open, the wiper will contact the track inside the sensor, and you will get a resistance reading, which will decrease in value as you open the throttle

 

ah ok thanks

 

Darren,

What ecu and switch are you using as the ford workshop info i have states
volts, is 2wd ecu is 4.5 to 5volts at idle closed throttle, and 0.5volts open.

and 4wd ecu l8 is backwards ie 0.6 volts closed and 4.5 to 5.5approx open. PFO1 IS 2WD AND PFO9 4WD THROTTLE SWITCH.

DAVE R

 

RICHM,

I think we need a update from STU as some of the info ive seen on here
and some info from fords seems to differ slightly or the ecu pins differ
like pin1 and 17 where i have info for 2wd as pin 30 and17 for resistance check
in idle position nothing open circuit and then open throttle slightly the resistance
should rise from 0 ohms to full resistance with throttle fully open to 400 to 600 ohms approx, and pin 11 and 30 resistance check,400 to 600, ohms,closed throttle
and the volts check as above for darren. This covers all the pins at the switch
11 17 30.from ford test manual.

DAVE R

DAVE R

 

Dave,
Pin 30 is 5V sensor supply to TPS and MAP sensor
Pin 11 is technically Sensor Ground, but should practically be the same potential as main ECU ground pin 1

On PF01
Whilst you can do the resistance check between 30 and 17, it makes 'conventional' sense to go between 11 (or 1) and 17.. measuring between 30&17 will 'reverse' the readings..:

Measuring resistance between 1&17 you will see open circuit at idle, max resistance just off idle, falling to min resistance at WOT.

Measuring resistance between 30&17 you will see open circuit at idle, min resistance just off idle, rising to max resistance at WOT.

Between 11 (or 1) and 30 you should see full TPS track resistance (400-600 ohms) at all times irrespective of throttle position. However be aware that the MAP sensor is also supplied by 11 and 30, so may modify the reading you get dependent on your meter.. ideally unplug the MAP sensor to make this measurement..

 

Im glad i went to bed now

 

Rich m.

I think i will use the system i always use fords, but nice to know there's another way of checking the switch although you say using pin 1 and 17 compared to 30and
17will give a reverse effect, i new 30 is 5volts supply as said to darren and 17 is
singnal,11, earth. I always keep a open mind as you can always learn, compared to what you know, I will do a test soon just to compare on the switch, thanks rich,


DAVE R.

 

The earth is common to teh system so it wont really make any difference which you use to be honest dave. I use pin 1 or 19 as thet are at the edge of teh connector and connected directly to teh engine at the cable hangar so are reliable earth reference points.