My '98 S70R has got a funny little habit. It only happens occasionally (maybe once twice a week at most). I'll get in, turn the key and it turns the starter motor but won't fire. If I turn the ignition back off and on it usually fires up straight away (I sometimes have to turn it off and on 2 or 3 times). I've started to notice it happens more if I've parked on a hill. It happens regardless of the amount of fuel in the tank. The rest of the time it fires up first turn straight away.
I've also noticed it occasionally does it sat in traffic. It'll idle normally and suddenly the revs will drop like its about to stall and then return to normal (it never stalls) Its an auto an it does this regardless of the gear and happens in neutral or park so I don't think its a gearbox thing.
Any ideas before I have to go down the route of changing all the plugs, leads etc etc?
cheers guys.
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