Series 1 overrun

|| Hi, || || When driving downhill in my 86" series I (2L engine) using engine || braking (2nd gear) the exhaust 'pops' every few seconds as though || the engine is overfuelled? It also does this to a lesser extent on || the flat in fourth gear if I ease off the accelerator at higher || speeds. Is this normal for this engine or does something need || adjusting? || || Thanks for any advice. || || Tony.

Don't know that specific engine, but popping is usually a sign of an air leak into the exhaust, usually at the manifold. I'd check that first.

cars can also pop when lean. in my car (which has an air/fuel meter) i only get popping when lean not rich. as richard says, also check for air leaks anywhere.

If there were a leak in the exhaust would it do it all the time or only when using engine braking as is happenening here?

Tony.

My 110 V8 does it particularly when I let my foot off the accelerator from a higher speed - i.e. when the engine is slowing the vehicle down.

Stuart

cant help you about the exhaust leak, but ive just fixed a bad fueling issue on my car which lead to it being very lean and i only got pops at the same time as you describe - when engine braking down hills.

That was my experience on a motor cycle I had once upon a long time ago.

FWIW: Ariel Red Hunter

Your timing is slightly out - new points & condenser will probably fix it.

Richard

On or around Wed, 19 Jul 2006 00:04:47 +0100, "William Tasso" enlightened us thusly:

bastard. I bet you flogged it cheap, too... and now regret it.

On or around Tue, 18 Jul 2006 22:39:54 +0100, Tom Woods enlightened us thusly:

yeah. lean mix (carb error or air leak) or incorrect ignition timing are the normal causes. timing too far advanced, IIRC.

yes, yes & yes

all a long time ago now

there's usually one on eb*y:

My series 3 seems to be doing a lot of that lately, (This is after I sorted out the full on backfire problem)

the engine is also running rather hot at the moment. (I suspect my radiator really needs flushing never mind I need to keep a closer eye on water levels)

But is it ever possibly economically and sensibly to get a pensionable engine "just so"?

I've still got one, '47 350.

Martin.

think mine was designated NH - definately had them modern OHVs :)

(19)47 is the year, NH the model (rigid/teles) 350 OHV. VH is 500 OHV.

Martin.