thegetgo

Well, I had a service done, oil, filters, plugs and now the problem has disappeared. Must have been the plugs. Glad it wasn't the MAF! Cheers all that helped.

DanTerzo, Is that the right way of measuring the voltage across the MAF? Hope I got it right. GetGo

To be honest, this is the first problem I've had in about 6/7 years of owning the car. (If you don't count the crack in the radiator expansion tank. But that happened 6 months ago, so still 6 years of trouble free motoring) It hasn't been serviced in about 6 months, so it's probably due a set of plugs anyway. I'll definitely do that before thinking about belts and tensioners etc. GetGo

Good question. Don't know. (Not a great help, I know!)

Here's where I connected my multimeter (there is no black wire!): If that's the right connection I've just had a 0.932 V reading. Is that too far out of the 1.02-1.04V bracket? GetGo

Cheers for that! Such detailed info aswell! I'll see what it throws up. GetGo

If it's them would it not be in evidence all the time, rather than just at certain revs? Getgo

I do have a multimeter. I'll give it a go. Cheers

Cheers, good info Would I be able to tell by looking at the MAF whether it was knackered? GetGo

Thanks for all the replies, Dudes. Definitely some stuff those that I was hoping wouldn't come up! Well, I have checked the car and, according to the lack of ECU fault codes, it doesn't think there is anything wrong. It is still running the original airbox and panel filter (filter is not the original one! It gets changed every service!), due to the problems these can have with induction kits. I was hoping that this would avoid any MAF issues. It wasn't remapped after the exhaust, but I haven't changed anything in over a year and a half. I would have expected a mapping problem to have made itself evident in that time, no? It just passed it's MOT emissions about 2 weeks ago. The stutter was evident before this time. Does that mean that the lambda is ok? I'll get the tensioner and cambelt checked, but I take the thing to Subaru for services and the belt was changed in 2005 (big service). Could it have seized in that time? It only does normal mileage (less than 10k per year). Again, Ive never heard of this either (But that doesn't mean much! ). Does any of this info give you lot any more ideas of what it might be? I might as well sort it all while I'm at it! GetGo

Hi everyone My year 2000 Impreza Turbo has developed a small stutter during hard acceleration. It happens mid revs -ish. Makes no difference if the engine has been running for a while or just freshly started. Anyone any ideas what it might be? I have taken all the cats out and replaced with a sports cat in down pipe, no other engine modifications. GetGo