Probably not, but we will soon find outaddo wrote:It's simply not possible for the belt to cause your problems.
But it's not that far fetched idea, with chain engines symptoms are misfiring, rough idle and other timing issues.
Moderators: RichardW, myglaren
Not to mention I can't see how a stretched belt would cause intermittent symptoms. The day after my recent post saying the performance was terrible the performance was semi-normal again, at least for the first 10 minutes of driving, then it started sagging again.addo wrote:It's simply not possible for the belt to cause your problems.
It is, in the context of this engine design. Once you see how the belt is routed and tensioned, it's easy to appreciate how it's all but impossible for this to occur.But it's not that far fetched idea, with chain engines symptoms are misfiring, rough idle and other timing issues.
I'm really reluctant to cut the harness to do this test, as I don't want to be trying to make reliable, air tight joins at a point where there is hardly any spare wire to play with. I'm not sure what it would prove anyway as I'm not looking for a dead miss (which is what I'd simulate) but a misfire under load which as you know is really hard to reproduce when the car isn't under load driving or on a rolling road.addo wrote:What if you jerry-rigged an interruptor switch to one pair of coils? Then you could see if it truly reflects your symptoms.
Yes, you'd have to cut the harness to do this.
Have already done so in the past. Can't find any problems with sensor inputs to the ECU.addo wrote:Check every sensor possible, by measuring at the ECU plug.
An electrical failure would mean it fails closed yes, but it could mechanically fail open. Are you sure failing closed would cause it to run rich though ?addo wrote:If the tube is broken it will act like a vacuum leak. Smoother running at a decent clip. Failed operation means permanently closed; no real effect other than slight richness at idle. The orifice is quite small.
How's your car running lately ? If you're still having problems with low rpm performance and pickup could you try blanking off the right hand lower spigot on the throttle butterfly as described above ? I'd be interested to see what difference if any you notice.larppaxyz wrote:It's been around three or four weeks since i did that and it's been much better. Not perfect still, but there is no 3500rpm lag appearing yet.
Right now my car is waiting for new belt(s), tensioners, water pump and most importantly new engine mount rubbers. Cost ~1000 euros inc. labour.