Coil Pack

[Nolton]

Can anyone please tell me y my c2 is got no power changed coil pack but the engine management light is still on car is impossible to drive as its shuddering and has no power

[paul.h]

welcome to the forum.

 

It could be a fuel injector has failed, we had something similar on a petrol C3, but it could be something else that causes a misfire. With the engine management light on, if you use a code reader it should tell you what is wrong without replacing parts in the hope you get the right one without wasting too much money.

[Nolton]

welcome to the forum.

 

It could be a fuel injector has failed, we had something similar on a petrol C3, but it could be something else that causes a misfire. With the engine management light on, if you use a code reader it should tell you what is wrong without replacing parts in the hope you get the right one without wasting too much money.

but sometimes the management light will go out and the car will run fine for a while it mostly happens when car has not been run for a few days

[paul.h]

The fault code will be stored on the car so can still be read, even though the light is not on.

 

Another possibility could be a faulty spark plug. If these have not been changed for a few years it is worth doing. I had this on a car years ago. I would not change any other parts though without reading the fault codes since it could be a waste of money. If you do not have access to a code reader a garage could charge more than buying one - this one from Gendan seems good value since it also gives some engine live data https://www.gendan.co.uk/product_FXNT200.html

[Landmark]

As I understand it there are 2 "types" of fault code. If it's a serious fault (usually to do with emissions) the EML will stay on. If it's a less serious fault, it will be logged but the light will go out if the fault does not reappear for a set time. It will however be stored.

Try putting your location in your profile as there may be someone near you with a code reader.

HTH,

Griff

[Nolton]

Thanks all for the feed back I've changed the coil Pack and plugs like I was told but car is doing the same do you think I could be the fuel filter or fuel pump that's causing the problem

[paul.h]

The car may have a fuel filter at the fuel tank end of the fuel pipes which if blocked could affect performance but may not put on the engine management light. Similarly a blocked air filter or its ducting. A blocked exhaust could also restrict performance. The fuel pump is an electric one which will either work or not, so it should not be the fault.

 

You should get the fault code read before doing anything else.

 

What engine is it, what year is the car and how many miles has it done ?

 

The engine management light coming on means a sensor that has an impact on exhaust emissions has detected a problem. The only way to find out which has detected the problem is by reading the fault code since you could replace every one of them before fixing the problem and if it is something such as engine wear/damage/timing belt fault it would not fix that. The sensors include:

 

- crankshaft position sensor - if this is faulty the engine is likely to cut out or not start

- possibly a camshaft position sensor depending on which engine is installed

- exhaust catalyst inlet and outlet lambda sensors but only the inlet one would likely affect performance

- knock (pinking) sensor

- MAP sensor on the inlet manifold (you could remove this and see if it is blocked with oil)

- possibly an air flow meter depending on which engine is installed, otherwise the air flow comes from the MAP sensor

- coolant temperature sensor - if this is faulty the fueling would not be right so performance would suffer and if you have a temperature gauge it may not show normal levels

- there will also be inputs from the fuel injectors, accelerator pedal, throttle body, the coil pack

[Nolton]

Thanks for the info think I going to take car to garage tomorrow a nod let them sort it will let you know what problem was when sorted thanks again

[Nolton]

Had car repaired number 1 injector thank for the help

[paul.h]

Thanks for getting back to us, I hope it was not too expensive.

[Nolton]

£183 some more money I did not want to spend but that's cars for you

[paul.h]

I do not know if the C2 is the same as the C3, but on the C3 1.4 petrol, the wiper washer pipes can leak at joints above the injectors and also the washer jets are not sealed on the bonnet so rain water can get through and drip on the injectors. This water causes them to fail as it rusts the coils and gets into the electrical connectors. This is a common failure on the C3 and caused 2 injectors to fail on ours. To stop it happening again I put black silicone sealant under the washer jets to seal against the bonnet and fit rubber piping to the washer jets  which seals better than the plastic pipe originally fitted. I also moved one joint to the side of the bonnet.