Dave86uk · Mar 10, 2015

Trying to work out if my maf sensor needs replaced but can't find a way to check, it's been a little hard on fuel and there is a tiny amount of black smoke in exhaust fumes, I did try unplugging it and running it round the block but I couldn't notice any difference in the way the motor ran? Is this normal? Any help apriciated

muckmuck · Mar 10, 2015

Don't you usually get eratic idle if maf sensor is playing up? You can actually buy maf sensor cleaner in a spray can ,might be worth a shot for under a tenner ?

Dave86uk · Mar 10, 2015

muckmuck said:
Don't you usually get eratic idle if maf sensor is playing up? You can actually buy maf sensor cleaner in a spray can ,might be worth a shot for under a tenner ?

Never knew you could get cleaner for them might try that,

LOVERJILL · Mar 10, 2015

Hiya, when I had maf sensor problem on my 90 td5 I disconnected it and ran it without the difference was quite noticeable , ie more power and more responsonsive so I put a new one on which did the trick ,other option is if you know someone with the same landy borrow there maf sensor for half an hour and see if any difference

Datatek · Mar 10, 2015

Dave86uk said:
Trying to work out if my maf sensor needs replaced but can't find a way to check, it's been a little hard on fuel and there is a tiny amount of black smoke in exhaust fumes, I did try unplugging it and running it round the block but I couldn't notice any difference in the way the motor ran? Is this normal? Any help apriciated

Diesel or petrol?

Dave86uk · Mar 10, 2015

It's 2.0 td4 mate

Datatek · Mar 10, 2015

Dave86uk said:
It's 2.0 td4 mate

If it runs more or less the same with the MAF off, may be worth trying another or better still get it on diagnostics.
However, lots of things could cause excess fuel consumption from the engine running cold to binding brakes. As it has a MAF, I assume it has electronic control, so a duff temperature sensor could cause the problem.

MikeyBee · Mar 10, 2015

Running my Td4 with MAF disconnected. Improved performance, also fitted with EGR bypass.

Datatek · Mar 10, 2015

MikeyBee said:
Running my Td4 with MAF disconnected. Improved performance, also fitted with EGR bypass.

EGR bypass is a waste of money, just needs to be disabled.

Dave86uk · Mar 10, 2015

Datatek said:
If it runs more or less the same with the MAF off, may be worth trying another or better still get it on diagnostics.
However, lots of things could cause excess fuel consumption from the engine running cold to binding brakes. As it has a MAF, I assume it has electronic control, so a duff temperature sensor could cause the problem.

Thank you for the info, where about is the temp sensor?

Dave86uk · Mar 10, 2015

MikeyBee said:
Running my Td4 with MAF disconnected. Improved performance, also fitted with EGR bypass.

I also just fitted the egr bypass and done a service, so I can just run it with it disconnected? Would that put on any lights on the dash?

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