Mass Air Flow Sensor for Nissan Maxima QX

I am not familiar with that exact one, but on other makes the extra pin is for a temp. sensor, it may be that the relevant temp is picked up elsewhere.

Coming back to the fault, if the maf is disconnected the car should still run quite ok, not as from the factory, but certainly quite drivable.

If the above doesn't at least make it run reasonably then I would first be looking at whether the fuel is correct, fresh and clean and if the fuel pressure is right, then plugs, leads, coils and TDC sensor (which often does not show up as faulty to OBD, even when it is shot)

Reply to
MrCheerful
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My car is currently in my mate's garage for repair as it won't run. The OBD info keeps throwing the code for the Mass Air Flow Sensor but my mate is a bit reluctant to categorically say that yes, the MAFS is the problem because when a MAFS goes faulty, usually the car will run but lacks power, whereas my car won't run at all - it'll fire up but is very lumpy and dies after a few seconds.

Thinking that if it wasn't going to cost much we might as well get a new MAFS anyway, he tried all his usual suppliers but can't get one and the Nissan Main Stealers want £253 PLUS VAT!!

I've looked on Ebay and there are quite a few suppliers who are selling MAFS for £25 to £35 that, according to the description, are listed as fitting my car (such as this one

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The descriptions state "Nissan Maxima QX, A33, 3.0, V6, 24V, Petrol, 2988cc, Year 03.00 to - (mine's 52-plated), engine code VQ30DE, ALL of which is correct, but these MAFS listed all have a 5-pin connector whereas my car and existing MAFS has a 4-pin connection. The official Nissan factory workshop manual wiring diagram clearly shows four wires and 4-pins, with a blank space on the connector where the fifth pin is located (picture here:
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Does anyone know if that fifth pin on the Ebay-listed sensors is somehow just a blank or is perhaps 'commoned' with one of the other four? In other words, would a 5-pin sensor from Ebay work in a 4-pin system? Or does anyone know where I can get a 4-pin sensor from, other than the main dealers?

Reply to
John

Thanks very much for your reply MrCheerful. The car was serviced about a week before the breakdown (probably did 150 miles that week, all ok) so it's got new plugs. It's dual fuel (petrol/LPG) - it normally fires up on petrol then changes over to LPG at a certain temp/revs but can be forced to fire up and run on petrol *or* LPG if you want it to. However, the fault looks to be common to both fuel systems as it won't currently run on either.

Cheers and thanks again.

Reply to
John

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