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SimonM
18th June 2000, 17:57
I have just been reading the thread about Blitz filters damaging the MAF sensor on later model cars. I fitted a Blitz cone filter about a month ago to my MY98, and it has recently developed a problem. Occasionaly when lightley touching or releasing throttle at low revs the car is extremley jerky; equivelant of if you accelerate hard in 1st gear and lift off of the throttle quickly. I have also noticed that sometimes it is not very smooth when accelerating thru the rev range, where as it always used to be.

Are these the symptoms of a faulty MAF sensor?

The thing is I have also ignored everyones advice http://bbs.22b.com/ubb/smile.gif and fitted an externally venting blow off valve (Bailey) at the same time as the blitz, so could it be this causing the problem. I tried to change the BOV back to the original plastic one, but managed to break it http://bbs.22b.com/ubb/frown.gif (anyone got a spare? http://bbs.22b.com/ubb/smile.gif)

Anyone go any ideas what could be causing my problem?

Mark.A
18th June 2000, 18:31
Simon,

Most of the "Blitz" related problems, were caused by either "vibration" damage, due to poor fitting (make sure it's very secure) or damage to the "hot film" type MAF on the later '99 > cars.

Your problem sounds like the Baily d/v. It's a very common problem with dump to atmosphere. Swap back to the original d/v, and see if it cures the hesitation.

Mark.