My 95 WRX is not accelerating as it should at the moment. When I'm accelerating with the revs over 4000rpm the engine seems to be mis-firing? The car jolts around as if the engine keeps cutting in and out. I don't know whether its the engine itself or the turbo, but it only happens as the revs climb. Can anybody shed some light?

 

I think Iffy spark plugs manifest themselves as a kind of mis-firing at around 4k.

Is the car behaving at idle, threatening to stall at junctions?

This might be a sign of a failing MAF.

NS04

 

i have a MY00 wagon with 49k and it seems to do the same thing but only in fourth and fifth. Only started recently too...

 

That's exactly what happens. The car always wants to stall, when the clutch is engaged the revs drop to zero then bounce back to 1000rpm, but the warning lights do come on for a second or so. . What is the MAF? Is it easy to replace? And are they expensive? Cheers

 

It seems problems with the MAF are very common, are there any upgrates or improved MAF's on the market. Are there any long term solutions, especially when using an induction kit??

 

hi mate i have a used maf off a my99 which will fit yours for £40 it cost £70 from the dealer its a year old but has only been used for 7000 miles it was working when i took it off

 

MAF =Mass air flow sensor IIRC. They are about £70-80 fairly easy to change yourself if you're mechanically inclined (10 min job apparently), but I took mine to my friendly specialist to do......partly cause I'm lazy! :-) Partly cause the sensors are rather fragile and can be contaminated easily, meaning another £70-80 for a new one!

You MUST get this done asap. It's a fueling issue that could lead to detonation and a engine rebuild. Drive very gently, off boost until it's done.

Regards,

NS04