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General Punto sporting 1.4 Temperature sensor housing replacement

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General Punto sporting 1.4 Temperature sensor housing replacement

Mike1alike said:
So it is from injectors then. Don't you think using a fuel additive that cleans them, before replacing them might do the trick and you'll not have to replace them? Although if they are broken, you will need to buy new ones. The good part is that new injectors work like a charm, the bad part is that changing them all at once would be a little expensive.
Click to expand...

Well here is the plan...........


I got second hand fuel rail with injectors for £30 and I have an air compressor. The original injectors are currently sitting in cleaning fluid. I have made a tube to quickly block off the fuel rail feed using the quick release system and some spare parts. The plan is to put the original injectors back on the spare fuel rail. Fill up the fuel rail with injector cleaner by hand, block the filling/feed hole, fit the air compressor to the schrader valve, and then operate the injectors until the injector cleaner has all passed out the fuel rail thru the injectors at 3 bar.

I can also test the injectors if they spray ok eventually for equal amounts of fuel.

And if that does not work I guess i will be giving up! :)
 
I don't think you'll have to give up, somthing's gotta work.
But don't disregard using a good fuel additive that cleans the injectors.
The one I used, that one above, in the picture worked very good. I used it first after I bought the car, sh not new. I have not dismounted the injectors prior to use to check how they fizically look. Just put the additive into gas. And with that in the tank, the engine clearly ran better, had more power then before.
Later on, I got to take down the rail and I could see the injectors looked very good. All clean, no deposit.
The second time I used it was recently. I had some problems that turned out to be caused by very poor gas that I was using at the time. Changed that and engine runs nice. And this second time I didn't get the same increase of power, probably because the injectors are clean and working well since the first time I cleaned them.
Your plan sounds good and I hope you'll get your injectors cleaned that way. But if you don't, I don't think you should give up, just consider using a good additive. They have kerosen and that increases a lot the combustion temperature so it cleans the injectors and the combustion chamber as well, trough burning heat. I think that is a way that could succed in cleaning if your method does not work.
Good luck!
 
Mike1alike said:
I don't think you'll have to give up, somthing's gotta work.
But don't disregard using a good fuel additive that cleans the injectors.
The one I used, that one above, in the picture worked very good. I used it first after I bought the car, sh not new. I have not dismounted the injectors prior to use to check how they fizically look. Just put the additive into gas. And with that in the tank, the engine clearly ran better, had more power then before.
Later on, I got to take down the rail and I could see the injectors looked very good. All clean, no deposit.
The second time I used it was recently. I had some problems that turned out to be caused by very poor gas that I was using at the time. Changed that and engine runs nice. And this second time I didn't get the same increase of power, probably because the injectors are clean and working well since the first time I cleaned them.
Your plan sounds good and I hope you'll get your injectors cleaned that way. But if you don't, I don't think you should give up, just consider using a good additive. They have kerosen and that increases a lot the combustion temperature so it cleans the injectors and the combustion chamber as well, trough burning heat. I think that is a way that could succed in cleaning if your method does not work.
Good luck!
Click to expand...

I am bit obstinate and I don't have much faith in additives. I think you might be mixing up injectors inside the combustion chamber with the puntos external plastic injectors? Some petrol cars inject directly?
 
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My Punto have direct injection into combustion chamber. The injectors' external end are hooked up to the injection rail which does not get any harm from the combustion chamber and they have between them heat resistant o-rings.
But you don't have to use any additive if you don't want to and I hope you'll succeed to clean your injectors as you've described.
 
Mike1alike said:
My Punto have direct injection into combustion chamber. The injectors' external end are hooked up to the injection rail which does not get any harm from the combustion chamber and they have between them heat resistant o-rings.
But you don't have to use any additive if you don't want to and I hope you'll succeed to clean your injectors as you've described.
Click to expand...

Hmmmmm. You got a picture of that arrangement please?
 
judderbar said:
Hmmmmm. You got a picture of that arrangement please?
Click to expand...
Here it is mate. The direct injection:
I didn't take down the intake air case due to the cold whether, if I would have you could see all 4 injectors. They are placed alongside engine, right near the spark plugs. But I took pictures from aside
In the first picture is the first injector that goes into the first cylinder. The yellow part is the injector's electrical connector and above is the injection rail valve underneath the cap. There you can measure the fuel injection pressure to make sure the fuel pump works well.
The second pic is from the other side, cylinder no. 4, same kind of injector and next pic is the fuel line in the middle connected to the injection rail.
The 4th pic is the rail with injectors on it, it's not mine, I found this pic with an exact same rail.
 

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No, it's inside the combustion chamber. The injectors pass trough the edge of manifold that is attached on the engine body.
 
And as you can see in the picture no. 4 above, the injectors have a little length, just exactly to reach the inside of combustion chamber. It's a really nice work that they have done, direct injection.
 
So than, at yours judderbar you have more chances to clean it as you described and very little to none to clean it with the additive I've mentioned. Although, even if the injector head is not into the combustion chamber, that additive act chemical and disolves some of the deposit. It says it cleans the entire fulel line.
 
Mike1alike said:
And as you can see in the picture no. 4 above, the injectors have a little length, just exactly to reach the inside of combustion chamber. It's a really nice work that they have done, direct injection.
Click to expand...

If you look at the inlet manifold picture I provided with the injectors fitted you can see the injectors do not pass out of the manifold. If you compare your injector rail picture with attached injectors, you can see there is very little length of injector after the electrical connection.

You can see in your pictures the injectors are going into the plastic manifold. That o ring at the end of the injector is right at the edge of the visible plastic manifold. It just sprays petrol into the air before it reaches the valves

Picture of gasoline direct injection injectors
 

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No, that's not how it works.
I took another pic, I hope you can see it.
The injector goes through manifold into the Cylindre Head, just like spark plugs. It goes a little higher and there the gas is sprayed into the combustion chamber.
 

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Or, now that you've mentioned it, I think I got that wrong. My bad.
The injection do happens inside the inlet manifold and outside the combustion chamber and the mixture goes through the valves to reach the combustion chamber.
Bottom line, the injectors were all clean and nice after I've used that additive.
 
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View attachment 214992
Mike1alike said:
Or, now that you've mentioned it, I think I got that wrong. My bad.
The injection do happens inside the inlet manifold and outside the combustion chamber and the mixture goes through the valves to reach the combustion chamber.
Bottom line, the injectors were all clean and nice after I've used that additive.
Click to expand...

OK. Lets see what happens when I use the pure additive on the injectors and wash it thru with a mixture of petrol and additive. Still waiting for my filling plug to go hard before I get around to it.
 

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