I have a 1.4 mk2 clio. I was just wondering whether a dodgy TDC sensor can cause just one piston to fail on its own? My thermostat has been leaking a lot lately and I think I read that the TDC sensor is located right beneath it. If some water/coolant has gone into the sensor, would it affect all the pistons together or can it isolate one?
I have checked the coil for the misfiring piston and it sparks fine. replaced the spark plug with a bosch one aswell and still no response from piston 4
Im really hoping its a cheap fix
Ignition Coils
Ignition Coils
An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.
This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion engine.
In older vehicles a single (large) coil would serve all the spark plugs via the ignition distributor.
In modern systems, the distributor is omitted and ignition is instead electronically controlled. Much smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (so two coils in a four-cylinder car). These coils may be remote-mounted or they may be placed on top of the spark plug (coil-on-plug or Direct Ignition). Where one coil serves two spark plugs (in two cylinders), it is through the "wasted spark" system. In this arrangement the coil generates two sparks per cycle to both the cylinders. The fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas the spark in its companion that is nearing the end of its exhaust stroke has no effect. The wasted spark system is more reliable than a single coil system with a distributor and cheaper than coil-on-plug.
Where the coils are remote mounted they may all be contained in a single moulded block with multiple high-tension terminals. This is commonly called a coil-pack.
TDC
TDC
In a piston engine, top dead centre (TDC) is used to determine the position of a piston in which it is further from the crankshaft. This is used to determine when to generate a spark. Many Renault models appear to experience problems with the TDC sensor, but it is a simple and inexpensive part to replace.
Currently in rufnek2kx's garage: Renault Clio mkII Alize 1.4i 8v 5Dr V reg E7F
hi just wondering how do you tell if he spark leads are gone i have a clio 1.2 16v 2005 every now and then when driving it will loose power but if you put down acelerater it picks back up ive look under the bonnet in the dark and one of he leads is sparking thanks
Currently in hunter21's garage: renault clio 1.2 expression 2005
my 1.2, 16v, clio campus sport had a similar issue... changed spark plugs and coil pack and ran fine for around 3-4 days (following diagnostics test)...
now the car is very poor in acceleration and wont go above 50-60mph... any ideas?
revised diagnostics test is coming back with a knock sensor issue
would appreciate your help and any swift reply, as its currently costing me a small fortune...
thanks, Graeme
Ignition Coils
Ignition Coils
An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.
This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion engine.
In older vehicles a single (large) coil would serve all the spark plugs via the ignition distributor.
In modern systems, the distributor is omitted and ignition is instead electronically controlled. Much smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (so two coils in a four-cylinder car). These coils may be remote-mounted or they may be placed on top of the spark plug (coil-on-plug or Direct Ignition). Where one coil serves two spark plugs (in two cylinders), it is through the "wasted spark" system. In this arrangement the coil generates two sparks per cycle to both the cylinders. The fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas the spark in its companion that is nearing the end of its exhaust stroke has no effect. The wasted spark system is more reliable than a single coil system with a distributor and cheaper than coil-on-plug.
Where the coils are remote mounted they may all be contained in a single moulded block with multiple high-tension terminals. This is commonly called a coil-pack.
Currently in mathaz_2003's garage: 1.2, 16 valve, clio campus sport, 56 plate
hi just wondering how do you tell if he spark leads are gone i have a clio 1.2 16v 2005 every now and then when driving it will loose power but if you put down acelerater it picks back up ive look under the bonnet in the dark and one of he leads is sparking thanks
I ruled out my leads by changing them around and checking whether the misfire was still on the same cylinder or whether it had moved. I was a bit lucky in the fact that the misfire is happening on the cylinder closest to the coil pack, so even when I changed the leads they would still fit rather well.
Ignition Coils
Ignition Coils
An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system which transforms a storage battery's 12 volts to the thousands of volts needed to spark the spark plugs.
This specific form of the autotransformer, together with the contact breaker, converts low voltage from a battery into the high voltage required by spark plugs in an internal combustion engine.
In older vehicles a single (large) coil would serve all the spark plugs via the ignition distributor.
In modern systems, the distributor is omitted and ignition is instead electronically controlled. Much smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (so two coils in a four-cylinder car). These coils may be remote-mounted or they may be placed on top of the spark plug (coil-on-plug or Direct Ignition). Where one coil serves two spark plugs (in two cylinders), it is through the "wasted spark" system. In this arrangement the coil generates two sparks per cycle to both the cylinders. The fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas the spark in its companion that is nearing the end of its exhaust stroke has no effect. The wasted spark system is more reliable than a single coil system with a distributor and cheaper than coil-on-plug.
Where the coils are remote mounted they may all be contained in a single moulded block with multiple high-tension terminals. This is commonly called a coil-pack.
Currently in rufnek2kx's garage: Renault Clio mkII Alize 1.4i 8v 5Dr V reg E7F
i have a clio 1.2 8v a while back timing belt snapped so head head gasket done new valves got it all togeather fired up perfect got it through test come to fire it up this morning and its on 3 cylinders pot 4 has gone down i have changed plugs changed ht leads and changed coil pack and also changed injector 4 for injector 1 but still same as any one any ideas why this may be and there is compressing in pot 4 need help and its a 2002
Hi Dale. I had similar problem and when I swapped injectors it seemed ok to, I did notice spray pattern was poor though, but checked in an injector spray booth I notice the said injector was producing a poor spray and fuel delivery rate was well under the other 3.
I bought a new injector at renault £66 and all was well.
Hope this helps you.
On the other hand di you check the tappets or manifolds for air leaks?
Currently in frankster's garage: 2001 clio II 15DCI
Linear Mode
