Noob question. 1995 850 non turbo. Is the MAF sensor attached to the top of the air filter cover? Is it after the flex air hose closer to the manifold?

The one of the turbo version seems to be in a different location than the non turbo ones. Cheers

 

The Mass Flow attaches to the air box lid. It is in the same place as on the turbo car.

 

Is this the MAF? Looking at online places, it seems to have a separate housing. Cheers.

 

I see you are not in the american market. That looks like what they call an intake air temp sensor. If you have that most of the time you will also have a map sensor. A sensor with a vacuum line going to it.

 

I think my 850 was originally from Singapore.

So does the MAP sensor require the same maintenance/cleaning as the MAF? I've got some CRC MAF cleaner that I was using.

Is it attached to the intake manifold on the other end of the air duct hose?

 

Here's a bigger view of what I'm seeing. There is a housing help on by hose clamps at the intake end. Is that what I should be pulling out and cleaning.

Should be noted that nothing has prompted me to clean it other than I don't think its been done. The car was from a farm and it was caked in dust. I'm about to clean the engine bay but thought I would clean the MAF/MAP as part of a tune up.

 

That is just a hose you can clean it if you want to.

You can clean the IAT sensor as well if you want to.

 

I gave the sensor in the intake box a clean but I was hoping to get the MAF/MAP sensor a clean just to improve fuel economy.

That housing on the intake side has a thin plastic line (vacuum?) and a larger rubber hose held on by a clamp which I don't think I can reattach if I remove it. It seems to be pinched on instead of using a hose clamp. A sensor is also there. Is that the MAP sensor?

I did note when I pulled that air intake hose off that the housing had some yellow looking sludge build-up. Not quite sure what it is. Sorry for the questions. I don't have a manual so I'm not quite sure what all these sensors are. Still looking for the right one!

 

I am not sure what sensor you are talking about sorry.

But that other part you asked about is the flame trap. If you can remove it and make sure it is clean and the holes are clear.

 

I guess I'm looking for the MAP sensor since I may not have a MAF. I'm confused as to where it is and whether it can be cleaned to gain the same effect as cleaning a MAF. With my luck, its not easily accessible.

 

Usually the map sensors cannot easily be cleaned. It might be mounted on the firewall.

 

Ok, thanks. I thought it was one of those maintenance things. Everyone mentions cleaning the MAF so I thought I would have a go. Little did I know that I didn't have one! Maybe I'll see if the wifes Honda has a MAF that needs cleaning. Took ages to find the cleaner in NZ.

 

Heh, the Honda probably doesn't have one either... never saw a Honda that did.

And MAP sensors are non- maintenance items... they're sealed devices that only measure vacuum. Basically, there's 2 ways of measuring air intake: an MAF, which is far more precise, but is prone to having its readings affected by either dirt on the sensing element, or any air leakage upstream of it, or with an IAT sensor + a MAP sensor. The MAP measures vacuum/ pressure, and the IAT measures temperature of the incoming air. Using both readings, the computer can make a reasonable estimate of how much air is coming in. It's a lot less precise, but a lot more robust and much less prone to interference, and makes sense for a car sold in an area where it might encounter harsh conditions such as S.E. Asia, where the car was originally from.

 

Thanks for that. Having a look online, it does appear that most honda's have map sensors as well. That being said though, ours is a honda orthia which was a japan only wagon so one can never know.

Anyone know of any other differences between 850's bound for US/Canada and ones for Asia?