C

coltron1

Member
Just got this car near sorted, but lately the idle revs won't settle. ( I mentioned this on an older, "Freelander 2 cutting out" , thread and Nodge suggested monitoring egr and throttle valve values, thanks Nodge, ).
The ecu has logged a fault code;-
Scanner now shows, "throttle sensor A, intermittent signal",

I believe throttle sensor values on bank A and B should be the same, but A value never quite settles and is generally always fluctuating between 1 percent +/- of bank B...Bank B seems to be always settled around 7 percent at idle.

I've looked for a new pedal sensor, but all i find (on ebay) are 2nd hand pedal assemblies?

anyone had similar experiences?
 
It could well be the pedal sensor. The ECM uses 2 sets of information from the pedal sensor, so an intermittent signal could well upset the way the engine runs.
 
Hi Nodge, I think the sensor isn,t available as a separate item as Freel 1....but hope someone has a tip/trick to remedy the situation without buying a full throttle assembly,.?
 
coltron1 said:
Hi Nodge, I think the sensor isn,t available as a separate item as Freel 1....but hope someone has a tip/trick to remedy the situation without buying a full throttle assembly,.?
Click to expand...

In typical Ford style, only the complete pedal assembly is available.
 
Thanks for confirming that (Nodge), I'm wondering , FL2 pedal assembly may be identical to certain other car makes of the 2007- 2014 era cars, eg ford , jaguar, Citroen, Peugeot..?.
 
Part No. for new FL2 pedal - £91
LR031902
Genuine OEM LR031902 - Land Rover Pedal for Freelander 2, 2006 - 2014, Range Rover Evoque 2012 >, Discovery Sport 2015 >.
 
Alternatively, I'm going to try cleaning my exiting pedal electronics, assuming i can get at the potentiometers as in the following you tube video;-



Will get back soon
 
coltron1 said:
Part No. for new FL2 pedal - £91
LR031902
Genuine OEM LR031902 - Land Rover Pedal for Freelander 2, 2006 - 2014, Range Rover Evoque 2012 >, Discovery Sport 2015 >.
Click to expand...

There are 2 part numbers for RH drive vehicles, 1 for the manual box and 1 for the automatic.
There are also 2 part numbers for the LH drive vehicles too, again different between manual and automatic.
 
Thanks for reply Nodge, I've tackled my throttle pedal. (before forking out)
upload_2023-4-10_14-23-44.jpeg


Comes apart ok, removed 3 nuts holding it on and pried off the cover via the clips once removed from the car.
TBH, it seemed clean inside and even a cotton bud didn't get mucky soaked in contact cleaner. The terminal block can be removed too, which has pronged contacts interfacing with the circuit board....all clean and re-installed , the varying circuit 'A', value (my scanner calls it "D") is still present.
n.b. reading the scanner when the pedal is disconnected, the circuit A (d) value is zero, but circuit B (e) remains at the value shown in the photo, maybe this signifies that the "B"(e) value is an ECU reference value?

Varies between 8.24% and 7.84% (photo showing higher value) maybe not as great as before...Can anyone verify what a good reading is at idle??

upload_2023-4-10_14-33-31.jpeg
 
Last edited:
Turns out ( as nodge suggested) the idle revs are dipping and rising with egr valve actuation?, the egr voltage shown below represents falling revs with falling voltage...EGR is choking the car at idle for unknown reason........and wondering if the throttle pedal is causing this?....
upload_2023-4-10_14-38-16.jpeg
 
If the EGR is causing the issue, then it could be the MAF sensor isn't giving correct air flow data. This is just a theory however, but as the MAF is responsible for feeding necessary air flow information to the ECM, it's based on logic.
I think I would be doing an air path calibration, but this needs JLR SDD to carry out.
 
Might well need JLR as strangely, my scanner won't show live MAF values in diagnostic mode until the car is moving?......but it will show in OBD2 mode and at idle.....might be something?
 
Car is acting like nothings wrong at the moment, so I'm letting the motor cool down....but will certainly jump on that when the fault returns Nodge
 
...so got my scanner obd plugged in while using the car after a couple of days......car started great and idle was fine, Maf at a steady 16g/s....I blipped the throttle and the idle dropped slightly with MAF at 10g/s.......EGR command between 3 and 18% up and down, but idle and maf stable..Drove a while with no problem...parked up for an hour, then restarted the car.......the engine revs immediately, started dipping and rising as described in earlier posts, though MAF appeared stable at 10g/s....EGR command was extreme up and down again...smoke piling out the exhaust...until I revved the engine a bit. Will check other parameters, when it happens again.
 
The MAF value should change with engine speed and load, not be fixed at 10gs. It would be normal for the MAF to show up to about 125gs.

Fun fact. You can use the gs figure to work out the rough BHP being made, simply by dividing the MAF gs figure by 0.8. I've seen mine peak at 130gs, which works out to 162 BHP.
It's not a 100% accurate way to calculate BHP, but it's one of those strange coincidences which is in the ballpark.
 
Thanks Nodge. The MAF figures quoted are all car at stand still and engine at idle.
TBH I think when the MAF reading was 16g/s at idle, the egr was fully closed, once the egr opened the maf reading dropped by 6g/s.

Am i right in thinking the throttle body helps with EGR gas recirculation too?
I initially thought the EGR should only opens when the car is being driven?
 
coltron1 said:
Thanks Nodge. The MAF figures quoted are all car at stand still and engine at idle.
TBH I think when the MAF reading was 16g/s at idle, the egr was fully closed, once the egr opened the maf reading dropped by 6g/s.

Am i right in thinking the throttle body helps with EGR gas recirculation too?
I initially thought the EGR should only opens when the car is being driven?
Click to expand...
I'd have thought the EGR would be open at idle cos there will be an excess of oxygen in the cylinders to burn the little amount of fuel being injected.
 
coltron1 said:
TBH I think when the MAF reading was 16g/s at idle, the egr was fully closed, once the egr opened the maf reading dropped by 6g/s.
Click to expand...

That's about correct then, and the MAF figure will definitely drop when the EGR is passing gas, which is how the ECM calculates how much to reduce the fuel throughput.

coltron1 said:
Am i right in thinking the throttle body helps with EGR gas recirculation too?
I initially thought the EGR should only opens when the car is being driven?
Click to expand...

That's correct. To increase the effectiveness of the EGR cycle, the throttle body plate will close by a pre-set amount. If you monitor the live data for the throttle, you'll see it close a bit when the EGR is active.

The EGR cycle will operate whenever conditions for it to do so are met, which includes while the engine is idling.
 
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