2000 C70 MAF Sensor

[Zanis]

Hello there,
I am new to this forum today, and was wondering if anyone here could give me some advice. I have just purchased a very nice C70 T5 for a bargain price. The seller had informed me prior to sale that the Mass Air Flow Sensor was malfunctioning. I have enquired about the costs of putting this right, but am reluctant to throw the car at a garage unless I have some confirmation that this is what is wrong. The engine is sluggish, and will not rev higher than 2000rpm. There is no smoke from the exhaust, but the engine does sometimes almost stall, and the engine management light is coming on. Idling is very lumpy and noisy for a T5 (I have had two 850 T5s in the past). Does this sound like a MAF sensor fault? Is it a plausible explanation? Any thought would be greatly appreciated! Thanks for reading this.

[Clan]

you need the fault codes reading it could be an electronic throttle fault , this will give air mass codes too .

[RUTV70]

Yeah I agree...code reading time.!..could be ETM/MAF I guess.
How was the seller so sure.????

Neil.

[Zanis]

I had thought about that - so the electronic throttle control can give trouble as well, then. Presumably this has been an 'advance' since my 850s. Is it serious if it is that?

[Zanis]

Neil - the seller said he had had a 'mobile mechanic' out to look at it and that was what he had said. The car is in reasonably good condition otherwise, but it had been left undriven for about months - never a good thing, and probably even worse for a performance motor like this. Thanks to you for your reply.

[jetronic63]

You definitely need to get the codes read, pref by a Volvo code reader. ETM and the MAF are one of the most common problem areas. Sometimes the ETM is just gunked up and a good wipe out with some brake cleaner or similar will solve the problems. The MAF sensor can cause all sorts of problems and spurious codes. I would start by cleaning the ETM as its easy and cheap to do. You could also spray something gentle like switch cleaner into the MAF at the same time to clean that. Then see how it runs and get the codes read to see what you have.

[Zanis]

Thanks for your advice. Will act upon it and report back.

[c70 jay]

i had a similar problem and had my codes checked. it came up as airflow, but my friendly mechanic told me to remove element and drown it in carb cleaner to clean it off.

this actually worked for me and the car was completely different to drive after, smooth and responsive pulling to the redline. although mine is only the lowly 2.0lpt i suspect the maf is a fault on all models.

not sure if that helps but just putting it out there

jamie

[M D E]

Just cleaned my MAF sensor, gave it a good soaking with WD40 then let it dry before reinstalling. I have boost back again ! Car feels more responsive, and quicker on the uptake !

So got away with having to buy a new sensor, I had doubts if it was working properly as my MPG had dropped, it was this all along.

[jetronic63]

Originally Posted by M D E

Just cleaned my MAF sensor, gave it a good soaking with WD40 then let it dry before reinstalling. I have boost back again ! Car feels more responsive, and quicker on the uptake !

So got away with having to buy a new sensor, I had doubts if it was working properly as my MPG had dropped, it was this all along.

Nice one ! - the MAF certainly makes a big difference to how the car runs. I had to go for a new one in the end although cleaning the old one helped a lot before it finally packed up. I got a new Bosch unit from Camberley Auto Factors for £170 which was a lot less than Volvo and in stock which was handy as the car was undriveable. Its lovely and smooth now and much more responsive away from the line. In fact so quick, the windscreen developed a crack from top to bottom and the heater motor packed up - actually that's a pretty good week for my V70. AWD going cheap anyone ??