Freelander Intercooler Hose Sensor

Just a quick question, I have just replaced an engine on a 2004 freelander TD4, I fitted the complete engine with all wiring etc. from a 2002 Model.

Anyhow have just about finished the change, wasn't to bad at all, now I notice that there is an extra sensor in the intercooler hose (2004 model) There is no wiring for this on this engine.

I am still running the cars original ECU (2004 model) and do not have the ecu for the 2002 model, Is it gonna be necessary for me to adapt the loom or aquire the 2002 ECU, or change the loom from the 04 engine onto this one (PITA). Or will it be fine just leaving it ? Many thank, olly

My 2003 TD4 has the same sensor in the intercooler hose but no wiring for it, I read on here I think that LR only supply the hose with the sensor now so I presume thats why mine has one but not wired up as the previous owner had changed the intercooler hoses, I believe this sensor was fitted from 2003 on so should your 2002 engine have one?

i think the older version took the air-intake temp. reading via the maf sensor
be something about that on rover ron's site

Tuning-diesels for low cost diesel tuning.

email r.ron and ask him what you can do about it ..

Thanks for replys, Bizzie- The engine is out of an 02 Model, but the ecu and the rest of the car are 2004, I Just changed the engine due to a snapped crank!
to hd3- Thanks for info, I wonder whether the 2002 MAF has the correct wiring to the ecu to check the air temp, or if the ECU is looking for reading from the separate sensor? Rover Ron certainly has some interesting stuff on his site and his tuning boxes look magic

I am still running the cars original ECU (2004 model)

Click to expand...

maybe find out where the connection to the a.i. sensor is in that ecu ?
and install in your own ..

on mine .. am fairly sure that i saw the a.i. sensor wiring coming via the cable
that goes to the maf ..

i'd ask rover ron .. he has his own section in the mg/rover forum:
Rover_Ron's Diesel Tuning Forum - MG-Rover.org Forums

i would refit the offending hose from the original engine to the new engine

that way all the wires and sensors should remain the same

Yeah I agree with that it would be easier changing a hose than I ECU I would think.

Well were getting there! I wired the air temp sensor into the ecu, connecting into the correct pins, I think that was the right thing to do (cheers HD3)
Just to confirm what the situation is:
I have a 2004 Freelander
I have a 2004 ECU (which originally had the air temp sensor fitted)
I have a 2002 Engine complete with its 2002 engine loom.

The car now starts and runs, no MIL light, however it has a rough spot at 2000-2500 revs, and will chuff out unburnt fuelly sort of smoke, enough to make a 20 a day man's eyes water! With the MAF disconnected it runs beautifully. I have tried the MAF from the old engine and it runs just as rough as with the new one?

Any more ideas?
Cheers, Olly

Bump (sorry). Just thought I would add, it appears to get marginally better when warmer. I Think I will check the coolant temp sensor tomorrow, does anyone know if this has any considerable effect on fuelling?

both temp. sensors effect fueling ..
a.f.i.a.k. .. only the coolant temp. data is used to calculate 'startup' fueling and glow plug operation

i've a litres-per-hour gauge fitted and can watch consumption in real time ..
e.g. watch both temp readings alongside the l.p.h. reading

about temp. sensors
http://www.autoshop101.com/forms/h32.pdf
~~~~~~~~~~~~~~~

links to freelander1 info

yeah - coolant temp info affects fuelling a lot

Thanks for replies-
Some more progress, I replaced the fuel pressure sensor on the end of the rail, with the one from the scrap engine, turns out they are different the one from the 2002 engine was massive, the one from the original engine was smaller, the loom has been modded as well. Changing the sensor made a noticeable improvement, although still not as good as with MAF off!
Changed the coolant sensor, actually seemed to make it worse?! Has anyone got any resistances for the coolant sensors so I can check them? Ta

Just an update, the fault clears as soon as the engine is warmed up a little now, then it drives fine, possibly glow plugs? Thanks

Hi I read this with interest as earlier this year I did exactly the same with exactly the same results. ie older Engine and no intercooler temp sensor cabling present, car smokes quite a bit and is a little lumpy around 2000-2500rpm. Did this every get resolved and if so what was the solution? Does the temp sensor cause over fueling or is it something else. Done crankcase conversion, remanufactured injectors etc etc etc other than this the car runs really well.
Would welcome comments.

Somersetsparks, can't see it being glowplugs, surely these only work to start the engine? Seems strange that we both followed the same route with the same result so it must be a problem relating to the missmatch ie engine/ecu.