misfire/judder
01 August 2006, 11:23 PM
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misfire/judder
hello this is my first time on the forum and hope you guys can help? weve got a w reg scooby turbo she is standard apart from a dump valve and an sti exhaust. the car will rev with no problem when stationery but when driving it will start to judder or miss at around 4000rpm . has anybody got any ideas?as the fault is driving me mad as i cant use the car to its full potential. many thanks nik 
03 August 2006, 09:48 PM
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A couple of years ago I used to get a misfire at around 80, turned out to be a cracked sparkplug, the mechanic had put a hair line crack in one when installing them a couple of week before.
03 August 2006, 10:13 PM
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Had similar problems with my MY00, although the hesitation was usually on light throttle at various revs. Replace MAF, Lambda, plugs and leads. This improved matters but problem was still there slightly. Replaced the MY00 Ecu (AE802) with a ecu from a MY99 (AE801) and the problem disappeared. Car drives smooth right through rev range now. It's like a different car with the AE801 in and it's quicker!!
