7 minutes ago, Joob said:

 

I'm just guessing.

If this can influence turning on when it's cold? (only cold)

At worst I can tell you how to investigate the idea. When the engine will spin over but not fire, remove the spark plugs and look for oil on the electrodes.

If any of the system(s) is weak the added resistance of it being cold could be enough to prevent starting, fouled plugs, ropey old ignition leads and lots more.  As you have already done so much it is taken that you have done these basic checks, indeed reminders to do so have been given.

 

If you put new plugs in 8 months ago are they the correct sort and with the correct gap and that gap checked before fitting?

 

Since this not starting in the morning have you removed the spark plugs and checked they are the correct ones, that the gap is correct and that they are reasonable clean?

 

I am not sure that the spark plugs will be culprits as the car starts just from rolling down a ramp but every part of the system that is working as it should helps and every part that is not working as it should could possibly hinder.

 

Is there any other information that you can give, what happens when you park up the car until morning and where is it parked?

 

What do you do to the car to park it up and leave it?

 

Have you tried looking at the engine running in the dark to see any stray electric sparks?

 

What happens in the morning before you try to start the car, what are the conditions, what has happened to the car overnight, what is around the car?

 

Have you got an alarm or any sort of immobiliser fitted?

 

On 22/11/2021 at 21:16, Joob said:

How can i test this fuel pressure regulator?

 

I have posted few months ago 2 videos, it's very easy for a mechanic to do it and with a manometer he also can check if the injectors have a leak.

If your regulator had major problem the car wouldn't start or you would have so much fuel and the mixture would be ''reach" and the spark plugs would show this to you immediately.

 

As for the starting video sound is a little bit ''weak" (like the battery has not enough power) and i don't like the way that the starter spins the last seconds.

 

 

On 22/11/2021 at 13:12, Joob said:

 

but I changed the temperature sensor, and now it shows the temperature on the display and everything.

 

Like this one

 

 

or is it the coolant sensor? which is on the radiator

 

On the radiator is the fan switch, this says to the fan when it's time to start spinning and when to stop.

He reads the coolant sensor after the thermostat had fully opened and had engraved on it the temperature range for example 80-85 'C.

The first sensor (the one with the blue ring) reads the coolant temperature before the thermostat.

4 hours ago, D.FYLAKTOS said:

i don't like the way that the starter spins the last seconds.

I think that's just the starter spinning down.

 

12 hours ago, nta16 said:

I think that's just the starter spinning down.

 

 

Yes but it takes too much time, i am not a mechanic but i think is not engaged as it should be and spins more time ''freely" as a little bit ''loose".

21 hours ago, D.FYLAKTOS said:

 

Yes but it takes too much time, i am not a mechanic but i think is not engaged as it should be and spins more time ''freely" as a little bit ''loose".

 

Switch in the starter makes contact even when pinion is not fully extended, so it's possible that starter spins for a moment without load (that happens quite often when engine starts sucesfully, it's just barely noticeable over engine noise), especially if there's unreliable contact to solenoid.

Yesterday I went to the car at 1pm, I checked the fuses (if there was any broken), and everything was ok. I went to test it with the new spare keys that I have saved, I tried to start the car and nothing, it seems want to go but it doesn't..

 

I pushed the car onto the ramp, put it in 2 gear, lifted the clutch and pufff turned it on right away, took a short ride with it, parked in the same place, turned it off and turned it on again, and turned it on instantly.

 

I'll leave the video here of me turning it off and back on.

 

the hours of the video, it was from having turned off the fuses :b

Can the starter motor when it's cold not have enough power?

2 hours ago, Joob said:

Can the starter motor when it's cold not have enough power?

In effect yes, the cold and/or damp could effect any or all parts of the starting system but the starter seems OK at other times and the car bump starts so easily that would point to the starter system. or there is something else about these cold starts.

 

 Are you pushing the accelerator?

 

Have you checked for fuel and spark at these times when it will not start?

 

Did you look for sparks in the dark?

 

Tried spray WD-40 around the electrics when it will not start?

 

Tried taking the starter motor off and thoroughly cleaning it again, if the car was stored for a while the starter might be full of dust or debris, or it might be getting damp, a good soaking and allowed to fully dry with something like GT85 would help to clean and drive out water, better still a strip down and clean of the starter as you might also find any weak connection.

 

Other than when cold the car starts so well that I keep feeling that the problem is something simple (and possibly obvious once found).

 

Did I ask what engine oil you are using and how old is it it (I think I did but forget now)?

 

 

4 hours ago, Joob said:

Can the starter motor when it's cold not have enough power?

In theory, yes, but in practice if this is an issue the car will start no problems with the clutch disengaged.

I keep forgetting the clutch pedal as in my car you do not push the clutch pedal when starting the car and in factory form if you do it hinders the starting.

 

That leads me on to one of my other obsessions of what oil's in the gearbox  😄 - but I'm more wondering about damp, condensation or wet somewhere but it might be in Joob's 'world' that it's also very cold there too .  (Apparent 0.5c, 31f, here at the moment which might be warm to Joob).

 

2 hours ago, nta16 said:

In effect yes, the cold and/or damp could effect any or all parts of the starting system but the starter seems OK at other times and the car bump starts so easily that would point to the starter system. or there is something else about these cold starts.

 

 Are you pushing the accelerator?

 

Have you checked for fuel and spark at these times when it will not start?

 

Did you look for sparks in the dark?

 

Tried spray WD-40 around the electrics when it will not start?

 

Tried taking the starter motor off and thoroughly cleaning it again, if the car was stored for a while the starter might be full of dust or debris, or it might be getting damp, a good soaking and allowed to fully dry with something like GT85 would help to clean and drive out water, better still a strip down and clean of the starter as you might also find any weak connection.

 

Other than when cold the car starts so well that I keep feeling that the problem is something simple (and possibly obvious once found).

 

Did I ask what engine oil you are using and how old is it it (I think I did but forget now)?

 

 

 

 Are you pushing the accelerator? --- No

Have you checked for fuel and spark at these times when it will not start? --- Yap

Did you look for sparks in the dark? --- Yap, nothing

Tried spray WD-40 around the electrics when it will not start? --- Yap

 

Tried taking the starter motor off and thoroughly cleaning it again, if the car was stored for a while the starter might be full of dust or debris, or it might be getting damp, a good soaking and allowed to fully dry with something like GT85 would help to clean and drive out water, better still a strip down and clean of the starter as you might also find any weak connection. -- I did it 4 days ago

 

Did I ask what engine oil you are using and how old is it it (I think I did but forget now)? --- I change every year

22 hours ago, Joob said:

I went to test it with the new spare keys that I have saved, I tried to start the car and nothing, it seems want to go but it doesn't..

 

I pushed the car onto the ramp, put it in 2 gear, lifted the clutch and pufff turned it on right away, took a short ride with it, parked in the same place, turned it off and turned it on again, and turned it on instantly.

 

Your spare keys are from factory or from a local locksmith which said that he already has ''programmed" them?

The video is with the good-old keys?

 

Have you ever inspect the main locker on the steering wheel column? Are all the contacts OK? Have you ever spray Contact Cleaner on it?

The idle on the video looks very good to me.

On 30/11/2021 at 09:15, D.FYLAKTOS said:

 

Your spare keys are from factory or from a local locksmith which said that he already has ''programmed" them?

The video is with the good-old keys?

 

Have you ever inspect the main locker on the steering wheel column? Are all the contacts OK? Have you ever spray Contact Cleaner on it?

The idle on the video looks very good to me.

 

Yes, the keys are from factory

They're kept in reserve, I don't even use them, and they work well.

 

Well, yesterday I bought a new starter motor, I've worked today with it, but the car was still warm.

Tomorrow morning I will test and see if it really is the starter motor.

 

Edited 1 December, 20214 yr by Joob

@Joob Let's hope that your problem will be solved tomorrow morning, best of wishes. 🙏

15 minutes ago, D.FYLAKTOS said:

@Joob Let's hope that your problem will be solved tomorrow morning, best of wishes. 🙏

 

   Finally, but what a strange problem. 

I think the problem was really the starter motor, this morning it turned on really well

 

Late afternoon and tomorrow morning I'll do another final test just to get all the certainty, and I'll leave the final statement.

The clock is ticking and i am ready to oped a champagne. 🥂

True... I'll have some champagne too 🍾

1 hour ago, Joob said:

 

   Finally, but what a strange problem. 

I think the problem was really the starter motor, this morning it turned on really well

 

Late afternoon and tomorrow morning I'll do another final test just to get all the certainty, and I'll leave the final statement.

Most odd indeed, because the engine sounded to be turning over, and at a reasonable speed too.

38 minutes ago, KenONeill said:

Most odd indeed, because the engine sounded to be turning over, and at a reasonable speed too.

 

Truth ! 
Good sound, and then it turn on well when it's hot, very odd indeed. 

 

Tomorrow I will say the final verdicts.

Such an unlikely solution. 

But grab yourself a beer

Well done. 👍

 

So it was the obvious, well to you and D.FYLAKTOS, myself and others thought the starter seemed OK by your videos.  I had the feeling it would turn out to be something silly and obvious after all your work on everything else but not necessarily the starter especially after you had cleaned it.

 

Well done to you for your persistence and patience and finding the cause. 👍

 

I am having the ale ready for tomorrow.

 

@Joob : So finally we have Case Closed?