Plugs soaked with fuel ( pics)

[fishmitten]

I think I have found the cause of my misfire , my plugs are getting soaked with fuel , it's had new plugs, leads , coil , crank sensor and now battery ..... I'm stumped lol

 

[mark123]

Nice bush.

It sounds like you need to plug in some diagnostic equipment.

Is the coolant temp sensor connected properly?

 

[Scrooge]

Above, plus what plugs are you using?

 

[fishmitten]

Using the right recommended plugs guys , my coolant temp sensor has a wire missing ( see pic) also it's just had belts replaced and dephaser done.

 

[Coops Mk1]

All 4 plugs soaked?

 

[fishmitten]

Yes mate all 4 soaked , the car will start but runs like a pig ,

 

[fishmitten]

Also mate I have just noticed that there is no power going to the temp sender , and if I turn the car over when it's disconnected the cooling fan kicks in and it doesn't start

 

[mark123]

Did you remove the engine prior to this problem?

I'd say you need something like an rs tuner so you can see what value the ecu is seeing from the CTS (coolant temp sensor).

 

[fishmitten]

No mate , engine was not taken out , I have no power to the sender either

 

[fishmitten]

Any ideas guys ?

 

[not normal dan]

Don't think the fact the belts have been changed would of caused this. What work previous has it had?

Also that cts plug looks rather tatty

 

[fishmitten]

It had valves done and head gasket , valves were all checked after grinding etc , what puzzling me is that the is no power to the cts ,

 

[not normal dan]

It's over fueling, reason for the plugs being sooted. Take it it was running fine before you did the work? Just checking out some wiring diagrams now

 

[fishmitten]

Yes mate it run perfect , just wondering if when the head was removed did the cts get banged or something daft

 

[AlexW]

Theres never power to CTS, it works on resistance.

 

[fishmitten]

Ha , that would explain that then mate lol , i disconnected the injectors 1 by 1 earlier and the engine not changed like it should too

 

[not normal dan]

It's whats known as a thermistor, resistance normally lowers the warmer it gets. Auto data doesn't contain any parameters/info for it though.

 

[not normal dan]

Ha , that would explain that then mate lol , i disconnected the injectors 1 by 1 earlier and the engine not changed like it should too

Have you checked the resistance across the injectors? From memory it should be around 14.5 ohms.

 

[MG cup]

You will still get power at the CTS, how does the the ecu know what temperature the engine is if no power?

Sensor's are usually 0-5v varying with resistance.

 

[fishmitten]

I've not checked the voltage but I know there is no voltage going to the cts ...

 

[fishmitten]

Would a failed cts cause all 4 cylinders to over fuel ?

 

[mark123]

A failed CTS would affect all cylinders equally and it may cause over fuelling depending on how it fails.

How can you know there is no power to the cts if you have not measured the voltage across it?

 

[fishmitten]

I just used a circuit tester on the wires going into the block connector on the cts mate

 

[not normal dan]

I just used a circuit tester on the wires going into the block connector on the cts mate

Tester? As in test light or multimeter? A multimeter will pick up the smallest of signal voltages. You also need to be whipping the cts out putting a meeting across it to measure resistance whilst its in a pan off water slowly warming up. Good way of testing them

 

[fishmitten]

It looks a bit crap tbh mate , I will replace on Monday as a matter of course

 

[not normal dan]

It looks a bit crap tbh mate , I will replace on Monday as a matter of course

Unless it's proven bad don't bother, you could be wasting good money on something you don't need

 

[fishmitten]

I'm just running out of ideas mate

 

[MicKPM]

Unless there's an issue with the ECU triggers this is most likely a faulty CTS.

Also, ref the coolant bleed issue you pm'd me about. Bleed it when its cold, put the bolt back in and then start the engine (holding 2.5k rpm until it achieves temp).

 

[fishmitten]

Cool thanks mate , I don't know how you keep your head working with renaults lol

 

[fishmitten]

Also it starts when cold and not when warm

 

[not normal dan]

Also it starts when cold and not when warm

That's more then likely because the car is running 'open loop' until it reachs certain parameters.

 

[Coops Mk1]

the CTS on my phase 1 I have just broken has 3 wires to it? not sure if phase 2 is different?

 

[MicKPM]

The ph2 only has two wires Coops

 

[Dan519]

needs a compression test IMO. I recon somethings gone back together wrong and the valves aren't closing properly

 

[steve!pax]

Did this get sorted I'm having the same issue at the moment. And I'm a bit lost :-(