I've been reading the information on the (very helpful) 45zs.info website but was wondering if someone could clarify the system used on a P reg Rover 400 that I have recently acquired. It has the electronic throttle and an intercooler.

Q. Does the MAF sensor actualy do much in this setup, or is it just to measure the amount of exhaust gas the EGR is passing? If the later, are there any reasonably priced tuning options available for this car? It does seem to suffer from very little torque below 2000RPM.

TIA.

Clearly I didn't look closely enough at Rons site, the TUNE-Am seems to be what I am looking for.

This seems like a good place to mention the different types of engine management systems used by MG-Rover on the diesels.

The 200/400 D without an intercooler.
These use a Rover ecu and mechanical injection. Since the ecu doesn't affect the fuelling they can't be chipped: its just used to control the timing, provide the immobiliser feature, supply the tacho signal and control the egr valve.

The 200/400/600SDI /Freelander
These use a Bosch MSA11 system which can be chipped but not remapped. The injection pump is a VP37 electromechanical type with drive by wire accelerator. My low cost Tu1 is an alternative to chipping.

The 25/45/Zr/Zs.
These use Bosch EDC15m with a Vp30 injection pump that also contains an second ecu. It is also drive by wire and the pump ecu is controlled digitally by the engine ecu over the CAN Bus (Controller Area Network)
Best option for more power (130BHP) is a remap via the obd port, BUT your maf sensor needs to be 100% or a mafam fitted or you will lose performance below 2500rpm guaranteed!
Believe me!. A £500 Superchip remap of my 45 was a waste of money until I fitted a mafam!

The 75/ZT/Freelander TD4.
These use Bosch's DDE4 system with a CP1 common rail injection pump.
Can be remapped via the obd port, but no point when my Tu3 or Synergy just plug in and work better.

Ron

Hi Ron

I have a w reg 2000 Freelander with the L series engine in. I'm a bit confused on which of your products to buy as mine is the later L series (not TD4 though)?

Do I need a TU1 or MAFAM MF75 with Pierburgh MAF sensor or all 3!?

Many thanks.

Dave

The L series Freelander's use the SDI engine, so a TU1 is what is needed.

A mafam won't fit, and nor is it needed because the maf sensor on this engine is puerly used to control the egr valve. Its worth disabling this as well, by simply disconnecting the thin black pipe at the egr actuator.

Ron

The L series Freelander's use the SDI engine, so a TU1 is what is needed.

A mafam won't fit, and nor is it needed because the maf sensor on this engine is puerly used to control the egr valve. Its worth disabling this as well, by simply disconnecting the thin black pipe at the egr actuator.

Ron

Thanks ron. I'll be ordering on januarys payday, which seems so far away right now...:(

Best,

dave

The L series Freelander's use the SDI engine, so a TU1 is what is needed.

A mafam won't fit, and nor is it needed because the maf sensor on this engine is puerly used to control the egr valve. Its worth disabling this as well, by simply disconnecting the thin black pipe at the egr actuator.

Ron

Interestingly enough, i disconnetced the MAF sensor today and the car ran sooooo much better! So should I get a new MAF sensor (or clean this one) before fitting the TU1?

Simply leave it unplugged. All it will do is disable the EGR valve which many people disable anyway.

Simply leave it unplugged. All it will do is disable the EGR valve which many people disable anyway.

I second that.

Ron

I second that.

Ron

Eh? Now I am confused! On your website it says,

"WHY CAN'T I LEAVE THE MAF UNPLUGGED?
Some owners have been advised that its okay to just leave the maf unplugged. This is not a good idea for the the following reasons:
a) Not only is there no air flow measurement, but no intake air temp sensing either so the ecu defaults to -5C. This results in over fuelling, especially in warm weather leading to poor fuel consumption and lump running.
b) The lack of air temp sensing means the timing is not optimum as the ecu uses the IAT to adjust the injection timing.
c) The ecu's overrun fuel cut off feature may be disabled, also making fuel consumption worse and engine braking worse.
d) Performance is worse: A higher revs on the L series - the engine won't rev past 4000rpm and on the 75/ZT/TD4 there is a stodgy, choked feel probably due to the overfuelling."

So should I leave it uplugged or not? http://images.landrovernet.com/smilies/confused.gif

That is only aplicable to the later freelanders. On yours all the MAF does is control the EGR valve, which you want to disable. On the later set ups, it is used by the ECU to control injection etc.
Jim

That is only aplicable to the later freelanders. On yours all the MAF does is control the EGR valve, which you want to disable. On the later set ups, it is used by the ECU to control injection etc.
Jim

Ahh I see, I didn't relaise both the L series and TD4s used the same Bosch PBT-GF30 MAF. That's where I was getting confused.

Thanks.


Dave

Ahh I see, I didn't relaise both the L series and TD4s used the same Bosch PBT-GF30 MAF. That's where I was getting confused.

Thanks.


Dave

Only the early Freelander and pre 25/45 l series use the same maf.
You can achieve the same effect as leaving it disconnected on these by just unplugging the thin tube on the egr actuator.

Ron

Ahh I see, I didn't relaise both the L series and TD4s used the same Bosch PBT-GF30 MAF. That's where I was getting confused.

Thanks.


Dave

I expect the L series in the TD4 and earlier version in Rovers (86bhp?, 105bhp) is the same, but the code PBT-GF30 is not the part number. It is the type of plastic used (polybutylene terephthalate, 30% glass filled), put on there to help cars comply with environmental legislation by their parts being recyclable. I'm in the plastics industry btw.

The post '99 L series (25/45) part no is F 00C 2G2 030 - 5 pin
The post 99 TD4/75/ZT is F00C 2G2 029 (BMW engine) also 5pin

The pre 99 L series engine fitted to the Rover and Freelander sdi use the same maf (4pin)

They are not interchangeable since the connectors are different and the 5pin ones include the intake air temp sensor as well.
Ron

hi ron i am new to this forum, i have a 1998 L series freelander i have been reading with interest the replys above can you tell me where abouts the egr valve is pls as i have not played about with this engine before, we have had it so called chiped but not to impressed with the results cost us £450 as the engine pulses its one of those chips where you can increase or decrease by yourself, i have tried both up and down but it still pulses and would be happy to change it, do you do a fitting service or is it diy only ?, any help would be very much appreciated.

hi ron i am new to this forum, i have a 1998 L series freelander i have been reading with interest the replys above can you tell me where abouts the egr valve is pls as i have not played about with this engine before, we have had it so called chiped but not to impressed with the results cost us £450 as the engine pulses its one of those chips where you can increase or decrease by yourself, i have tried both up and down but it still pulses and would be happy to change it, do you do a fitting service or is it diy only ?, any help would be very much appreciated.

There is a photo of the egr valve on the page below (secion e)

http://45zs.info/Lseries/sdi.htm

Its hard to know why this other make of tuning box is pulsing - does the manufacturer not have any suggestions?

My Tu1 can cause this as well, but you just back off the control a shade until it stops. I'm surprised this can't be done with yours.

My boxes are all for diy fitting and the instructions are good (I'm told!) so most owners don't have a problem finding out which wires it connects to.

Ron

thanks ron for the reply, with regards the box i have i have just turned it back a bit more and the pulsing has reduced but not gone completly may try a bit more later will the pulsing cause any damage ?, i will also try dissconecting the egr pipe now i know where it is and will de cat the cat if that makes a difference i will by one of your straight through pipes also increase the boost on the turbo, do you know if there are any free flow back box's available, and lastly does changing the fuel filter have any effect as i don't know when it was last changed we have had the vehicle for 3 years and done about 30k its coming up for 98k on the clock now.

Many thanks

thanks ron for the reply, with regards the box i have i have just turned it back a bit more and the pulsing has reduced but not gone completly may try a bit more later will the pulsing cause any damage ?, i will also try dissconecting the egr pipe now i know where it is and will de cat the cat if that makes a difference i will by one of your straight through pipes also increase the boost on the turbo, do you know if there are any free flow back box's available, and lastly does changing the fuel filter have any effect as i don't know when it was last changed we have had the vehicle for 3 years and done about 30k its coming up for 98k on the clock now.

Many thanks
The pulsing is unlikely to be damaging, just irritating!

The decat pipe is now available from member wingy777 and will fit the Freelander as well.
The fuel filter should be changed every 24k max so I would definitely change it asap.
I change mine every 16k - ie every other oil change. (I change the oil more frequently as my engine is tuned and I recommend this on any tuned engine)

I doubt there are any off the shelf back boxes available, but Powerflow or Longlife etc could make you a stainless system for under £200. (google for their locations)

Ron

Hi ron thanks for quick reply, i will change the fuel filter at the weekend and have a google for the box's thanks again

I doubt there are any off the shelf back boxes available, but Powerflow or Longlife etc could make you a stainless system for under £200. (google for their locations)

Ron


Get in touch with wingy777 for exhausts.

Cheers
Skelo