Peugeot 205 XR
Discussion
So as a bit of a chance I whipped the aux belt off to see if that made a difference. and after running it for ten minutes or so, I don't think I can hear the knocking noise - which I could hear this morning before taking the belt off. Not sure why an aux belt could cause a knocking noise ... or it could be coincidence.
Got a friend with more experience than me coming round to give me a 2nd opinion in person tonight hopefully
Got a friend with more experience than me coming round to give me a 2nd opinion in person tonight hopefully
Took it out for a bit of a longer spin sans aux belt and knocking still seems to be gone, which is a great coincidence.
Still think it is running rich - there's a bit of a burbling / throbbing noise from exhaust, starts up very easily when cold without much choke etc. I also think mpg must be terrible as I seem to have used half a tank of fuel and I've probably done 50 miles if that in it. But...it is not knocking
There is an alternator place near me that apparently will test your alternator for free so might whip it off and take it to them. The joys of the simple 205 - fairly sure it is two bolts and some wiring connectors and can do it without even jacking the car up.
Still think it is running rich - there's a bit of a burbling / throbbing noise from exhaust, starts up very easily when cold without much choke etc. I also think mpg must be terrible as I seem to have used half a tank of fuel and I've probably done 50 miles if that in it. But...it is not knocking
There is an alternator place near me that apparently will test your alternator for free so might whip it off and take it to them. The joys of the simple 205 - fairly sure it is two bolts and some wiring connectors and can do it without even jacking the car up.
Alternator off. That was very easy. Two bolts and contrary to Haynes you can do it from the top without taking the wheel off.
Hoping to take it to local place to test if good or not. If not, problem found and will replace. If good, might just need refitting carefully.
Experienced mate had a listen to the engine and his view is it seems to be misfiring ever so slightly but if it had a bent valve it would sound a hell of a lot worse so might not be related to screw incident. Provided it doesnt get worse and alternator sorts knock will probably drive it and see !
I bought a new idle jet to see if this would resolve the idling problem. It does not look like my old jet ...
I bought a size 45 one of these based on the following from the Haynes guide:
So not sure if I have bought the wrong one or if the existing one was wrong. It runs better on the old jet slightly cracked open, though this may be a set-up problem.
Problem is, the Haynes manual says that to set the idle mixture, I need to measure with an exhaust CO device and compare against manufacturer specifications - and I do not have an exhaust CO device. They are about 40 quid - does anyone know a way of setting it up without one?
I bought a size 45 one of these based on the following from the Haynes guide:
So not sure if I have bought the wrong one or if the existing one was wrong. It runs better on the old jet slightly cracked open, though this may be a set-up problem.
Problem is, the Haynes manual says that to set the idle mixture, I need to measure with an exhaust CO device and compare against manufacturer specifications - and I do not have an exhaust CO device. They are about 40 quid - does anyone know a way of setting it up without one?
Get the engine to temp, adjust the idle jet until the engine idles at specified revs.
Does the carb have an adjustable idle jet and an idle adjustment screw?
If you've turned the idle jet through it's entire range and it has an effect but you still can't get it to idle properly, then the issue lies elsewhere.
Does the carb have an adjustable idle jet and an idle adjustment screw?
If you've turned the idle jet through it's entire range and it has an effect but you still can't get it to idle properly, then the issue lies elsewhere.
TEKNOPUG said:
Get the engine to temp, adjust the idle jet until the engine idles at specified revs.
Does the carb have an adjustable idle jet and an idle adjustment screw?
If you've turned the idle jet through it's entire range and it has an effect but you still can't get it to idle properly, then the issue lies elsewhere.
I have an idle adjustment screw, which simply increases or decreases the amount of throttle applied at idle. I can adjust it when warm and the idle adjusts, and can get it to idle fine - but high. Does the carb have an adjustable idle jet and an idle adjustment screw?
If you've turned the idle jet through it's entire range and it has an effect but you still can't get it to idle properly, then the issue lies elsewhere.
I also have the idle jet, which I understand is not designed to be adjusted - but the car only idles correctly when it is cracked slightly. This seems to mean a problem with the idle mixture / idle circuit. This is what I sought to replace.
I then have the mixture screw, the adjusting of which doesn't seem to do very much.
I did find this diagram, which seems to give a method of adjusting mixture sans a CO device. It isn't for quite the right Solex carb however (seems to be 34 PBISA 16 rather than 34 PBISA 17), but may be a good starting point.
TEKNOPUG said:
What does it idle at when adjusted?
No tachometer but I would guess it is easily above 1000, maybe 1200?In other news, took the alternator to the local testing place this afternoon. Sadly...it is not broken and is not knocking! Chap said it was charging a bit slow and was clearly old and rotten inside but not knocking. Drat. So suppose I will refit carefully and hope the knock was caused by a loose bolt or something...
Never known an alternator to knock. I have heard engines produce a knock similar to the one yours does. I didn’t want to be the harbinger of doom but I think that if the engine knocks with the alternator connected and doesn’t knock with the alternator disconnected, what that tells us is that the load of the alternator puts the engine into a condition where the knock is evident and coincidentally the knock isn’t evident when that load is removed.
Cascade360 said:
TEKNOPUG said:
What does it idle at when adjusted?
No tachometer but I would guess it is easily above 1000, maybe 1200?In other news, took the alternator to the local testing place this afternoon. Sadly...it is not broken and is not knocking! Chap said it was charging a bit slow and was clearly old and rotten inside but not knocking. Drat. So suppose I will refit carefully and hope the knock was caused by a loose bolt or something...
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