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Does chevron techron help with clogged fuel injectors? Poor

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Hi does chevron techron help with clogged fuel injectors ?
JA: Has the vehicle turned into a gas hog? And how does it start -- same as usual?
Customer: Poor acceleration, carbon fouled spark plugs
JA: What is the model/year of your BMW?
Customer: E92 LCi 318i
JA: What year is your 318i?
Customer: 2012
JA: Are you fixing your 318i yourself? What have you tried so far?
Customer: Yes
JA: Anything else you want the Mechanic to know before I connect you?
Customer: No
Customer: replied 1 year ago.
The thing is I fitted brand new spark plugs pulled them out after two days and they are black
Customer: replied 1 year ago.
I have changed two fuel injectors index 11 on bank 2 but on bank 1 I left old index 9
Customer: replied 1 year ago.
Do you think they can cause the problem
Customer: replied 1 year ago.
Is there way I can test them ?
Customer: replied 1 year ago.
Car was running great for about two days and then problem came back

Dear customer, thank you for choosing Justanswer. My name is***** would like to help you.

Yes, techron helps against dirt on the injectors.

But I think that the problem could be somewhere else.
Mostly too little air is the cause that fuel burns badly and soot accumulates.

Make sure you check the air filter and the intake manifold. Especially with this model it happens quite often that oil carbon settles in the intake manifold and thus reduces the cross-section of the pipes.

This means that less air can be sucked in and the combustion process produces heavy soot. If the intake manifold is clogged, however, only a new manifold will help.

I would be very happy about a rating with 5 stars over the star bar at the top of the page, without this rating the site operator does not pay us experts.

Customer: replied 1 year ago.
How can I check intake manifold ?

Either remove the throttle valve and go into the intake manifold with an endoscope camera, or remove the manifold completely and take a look.

Customer: replied 1 year ago.
I have a knocking sound when car gets hot as well it sounds like fuel dentination

This could be a knocking burn, cause could be here:

- Injectors clogged
-poor fuel quality
- not enough air in the combustion chamber
-control chain lengthened

You can start with the chevron, but if it doesn't improve in a short time, the other things have to be checked.

experteer and other BMW Specialists are ready to help you
Customer: replied 1 year ago.
Thank you for your help. One more question, do you think that one clogged injector could cause carbon fouled spark splugs
Customer: replied 1 year ago.
I mean all of them
Customer: replied 1 year ago.
As after I changed 2 injectors car was running great for a while

It is possible, but experience shows that too little air is more often the cause.

Customer: replied 1 year ago.
Thanks a lot ! Take care

You´re welcome

Customer: replied 1 year ago.
I think I found what's causing the problem in my car. I have n43 engine which there is only one fuel bank. I don't why but someone fitted injectors with different index. Cylinders 1 and 4 are index 11 and cylinders 2 and 3 are index 9
Customer: replied 1 year ago.
I've been told that because some reason they can be mixed
Customer: replied 1 year ago.
I assume fuel flow is different
Customer: replied 1 year ago.
They can't be mixed
Customer: replied 1 year ago.
Do you think I can be right ?