1.4Fsi air mass meter?

[batteryman]

Hi everone,

I drove my wife's 1.4Fsi Polo this weekend and noticed a problem similar to one I had with a diesel Golf a few years ago.

Driven at part throttle the car runs very well and has no problem cruising at speed on the motorway. I've noticed that when the accelerator is floored, the response is very poor - as though a giant hand is holding it back. As the pedal is released, the power come back on. When my diesel Golf had this kind of problem, a new air mass meter cured it. The question is, do the petrol engines suffer the same kind of problem? The car's a 2004 model with 44,000 miles on it.

The only other experience I've had which was similar and with a petrol car was an HT fault on the ignition; as the cylinder fills the increased pressure and presence of an insulating material (petrol) tends to douse the spark or make the HT track to somewhere other than the spark plug. Cured by either new HT parts or by closing the plug gap to the minimum recommended.

Anybody got any comments?

[Crasher]

Polo 6R with a CMAA engine? They don't have an AMM.

[batteryman]

Thanks for the reply Crasher - you've helped me before and I appreciate it. According to the service manual it's an AXU engine.

[Crasher]

I think a fault code read would be the best place to start. Is it a 9N1 or 9N3? This section of the forum could do with being subdivided into Polo 80/86/87 (AKA Polo 1&2), 6N1, 6N2 (Polo 3), 9N1, 9N3 (Polo 4), 6R and 6C (Polo 5).

[batteryman]

Hi crasher. It's a 9N1 4-door SE model. I intend to get a code read ASAP; it did have a dirty throttle body a while back and I cleaned it with throttle body cleaner and elbow grease without taking it off. The car ran well after that when it had burnt off all the cleaner, I don't drive it regularly but noticed this fault on hills in North Wales over the weekend and my diesel Golf estate had the same feel about it some years ago.

[Crasher]

From the throttle bodies I have seen on those, you can't clean the properly without taking them of as the EGR deposits are so thick and the basic settings process is always a good idea.

[batteryman]

Hello again, just had a look under the engine cover. It has a part labelled 06B(8?) 905 379A in the air box just above the throttle body. Air mass meter or air temp sensor? I'll get round to a code read sometime soon - it's not being driven much at the moment.

28291

[Crasher]

That is now 06B 905 379 D and is the inlet air temperature sensor, they don't have an AMM.

[batteryman]

Thanks, it has the look of an industrial PTC temperature sensor. Time for a code read when I can get round to it.

[Crasher]

It think they are NTC like most of the temp senders but I have never bothered to find out.