Car woes help

Hi everyone, my beloved 106 is giving me some trouble. The car is running very very rich, for some unknown reason, to the point that I suck plenty of petrol (obviously) but, most importantly it is misbehaving when throttling just above the hidle point.
I thought it was a faulty injector so I changed, but it did not solved the problem. I thought it was the petrol filter, changed it did not solve the problem either.
I booked it to the mechanic, he tried a new ignition coil and run the computer but nothing changed (he didn’t charged me though) said it could be either the ECU or the temperature sensors. Both have been changed (ableit like the injector second hand from a scrappy car at the bodyworkshop) but still nothing goes. Anyone has any ideas? It’a 1992 1.4 L petrol 10 with a monopoint injector. Help gladdly appreciated.

how do you know it is running rich?

probably burnt an exhaust valve or something. get your mechanic to do a leak down or compression check

how do you know it is running rich?

the spark plugs are filthy and so is the ground where the exhaust is. It does not happen when cold though, only when the car start to warm up.

what he said abuut an exhaust valve?? The fact it is only happening when warm so something is worn somewhere could be piston rings and oil getting through

Is it all plugs? what mileage?

Yes all the plugs are filthy, milleage is probaby around the 180000kms. As I have broken the speedo (not the cable though) 5 years ago at 122000kms.
I just had that I have just fully clean the water circuit by putting some soda inside and running the car 30kms

Lambda sensor ? These are often out of circuit till the engine warms up, often they have heaters inside to get it up to operating temperature quickly..

Sorry to be the one to tell you this, but your 106 is at the end of its life.

110k miles is good going for a 106 – they’re lifed to about 90k. You may be as well finding a crashed one at a scrapyard with low mileage and swapping the engine.

But then something else will go on it!

Fizzicist- ?

Based on what evidence?

An air leak between air mass flow sensor and inlet manifold would cause these symptoms. As would several other things. Sorry, can’t really know without properly looking at it, but it ‘could’ be a cheap fix.

Certainly won’t be a burnt out exhaust valve , no miss fire ?

I’d go with pete on this and say lambda sensor . Sensor doesn’t go in to closed loop untill engine is warmed up . Common cause of MOT emissions test failure , especially on this engine .

read again, it’s misbehaving over idle, which can be a compression issue.

if its a uk car then lambda wasnt a legal requirement until 1993. i would throw the car away and buy another one

ok not sure I have made the misbehaving THAT clear, basically idling is fine, so is full throttle, it’s just when I barely press the pedal that the car rattle and has “hip cup”. Won’t the lambda sensor show something when pluged in the computer?

ah. can you video it doing it and put it up?

Only does it when warmed up – has it got an automatic choke at that age?? Could be stuck on.

Air filter crudded up?

After checking , the the basics , timing , injectors , etc , there was a common fault that the inlet manifold became carbon ed up and caused misfire and is only an issue with the early mono point injection .
It’s easy to check , remove the throttle cable , fuel pipes and x6 10 mm nuts and have a look with a mirror and a torch !!!
You owe me a pint if I’m right !!!
Good luck

Valves / Valve seats? Try a petrol additive.

map sensor,lambda,ecu……..

usually with map sensor it won’t idle when hot, they don’t tend to like lambda sensors that haven’t come from peugeot

No 1 to check is the breather pipe between the rockercover and the air filter box- make sure that you can pass stuff through it without any obstruction, if its blocked you will be pressurising your top end of the engine with oil gases and they will leak past the rings into the cylinders and be burnt off causing similar symptoms. More often than not on all older cars that friends and family have come to me with such problems its been as simple as cleaning that pipe or repairing splits in it. Used to own a 106 by the way and had similar issues which were down to the above!

Thanks for your help peopel I’ll have a look at that pipe suggsey, chris if you’re right I’ll get you this pint eventually one day 😉 cheers for that people.

I’ve run lots of 106/205’s, many with the 1.4 TU or XU engine. Generally they all drop to bits at around 90-100k. Usually radiator/gearbox/wheelbearings start playing up. They’re great little cars and very cheap now, so generally not worth repairing.

Ok so in no particular orders:
I have removed the injectors, the paper gasket was quite “greasy”, so I used blue gasket paste to put it back together, I have changed the breather that goes from the manifold, under the injector to the top of the airbox and made sure all was cleaned (it was indeed a bit jammed).
Idling motor works just fine.
Chris are you talking about removing the whole injector?
Now the new thing is the exhaust fume being very white.

I’ll pop by the mechanic see if he has an idea. Otherwise I just hope I’ll be able to get to my new work (starting on monday) without too much issues.

White smoke – isn’t that coolant? I had awful issues with my car when the temperature sensor went but not fueling issues from what i remember, it would cause idling issues and general poor running. When i took the old sensor out it seemed clean but there was a noticeable difference from a new one.

Yeha I’ll get a new one they are only some 20 euros, and I4ll report back

Why on earth did you buy a French car? I put them on the same level as NoTubes rims. They are not for driving. A friend has jumped one off a step round here and it broke, instantly. My local car dealer will not stock them, though if you insist he will etc… Not fit for porpoises. 😉