Slight idle vibration (intermittent) - Page 2 - Mercedes-Benz Forum
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post #11 of 30 (permalink) Old 02-26-2019, 06:59 AM Thread Starter
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Thanks, in that case I can use it right away because most of my driving is short trips
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post #12 of 30 (permalink) Old 02-26-2019, 10:39 AM
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The best fuel system cleaners contain PEA (Poly-ethyl-amine?? Can't remember...). Chevron's Techron and AMSOIL's PI both have PEA cleaners and work very well.

That said, at some point, injector performance degrades to the point of needing a professional, off the car cleaning. None of the on the car solutions offered by dealerships work as well as a true professional cleaning.

In that case, I recommend this guy:
Hurst Injector Service
125 East Street, Fitchburg, MA 01420 - Tel. (978) 516-0066

He cleaned and flow-balanced the injectors on my wife's Volvo XC. Big difference. The cars idles smoother, and has more power. He can handle any injector.

Cheers,
Astro
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post #13 of 30 (permalink) Old 02-27-2019, 01:23 AM
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Hi,

I once had a Mitsubishi GTO V6 TT Car, I bought it well cheap with a misfire, checked the usual, Compression, Spark etc but no dice.
Apart from "Misfire Cylinder x" no other Codes !!

I removed the Injector from the Fuel Rail and Head, (and now it gets a bit sketchy as my memory of last week is bad let alone 25 years ago) , but .............

I recall I found a tiny little strainer in the Fuel Inlet of the Injector Body, and this was full of crud .............

So I cleaned out said strainer, and then did the other 5, which weren't as bad, but had some particles in them, after this the Car ran sweet as a nut for many years and then I sold it

I would expect all Petrol Injectors have similar, and well worth a look before paying someone else, as you have gotta remove 'em anyways

HTH,


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post #14 of 30 (permalink) Old 02-27-2019, 06:57 AM
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Slight idle vibration (intermittent)

Quote:
Originally Posted by Dave2302 View Post
Hi,

I once had a Mitsubishi GTO V6 TT Car, I bought it well cheap with a misfire, checked the usual, Compression, Spark etc but no dice.
Apart from "Misfire Cylinder x" no other Codes !!

I removed the Injector from the Fuel Rail and Head, (and now it gets a bit sketchy as my memory of last week is bad let alone 25 years ago) , but .............

I recall I found a tiny little strainer in the Fuel Inlet of the Injector Body, and this was full of crud .............

So I cleaned out said strainer, and then did the other 5, which weren't as bad, but had some particles in them, after this the Car ran sweet as a nut for many years and then I sold it

I would expect all Petrol Injectors have similar, and well worth a look before paying someone else, as you have gotta remove 'em anyways

HTH,


Yes it's fairly easy once the injectors are out. Our road-side mechs do it all the time, couple of wires, some connectors, a battery, can of carb cleaner, an assistant, plug, spray, helper taps battery in sync in pulses.

There's is a tool on amazon to also do it with one hand. Will post the link.

Also did my ml about over 6 months now and it still runs very very well.


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Last edited by noetico; 02-27-2019 at 07:21 AM.
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post #15 of 30 (permalink) Old 02-27-2019, 07:16 AM
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Plugged injector... Low power, misfires, false codes. Had this on my ml and it was terrible. A fraction of this will also give you some issues cus this one was abnormal lol



My very own local injector cleaner...

I don't think it's worth it?? But here's something more pro and one person operable. But it's expensive...




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post #16 of 30 (permalink) Old 02-27-2019, 09:56 AM
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[QUOTE=noetico;17709228]
My very own local injector cleaner.../QUOTE]

Now THAT'S what I call a plugged injector! Wow!
Your home made injector cleaner tool is the better choice for most Do-It-Yourself'ers out there.

A trick I learned from one of BG's vendors back in 1988 when I was first introduced to their products, is to put in TWO cans of 44K during gas\petrol tank fill up, drive the vehicle (that same day) until you're down to 1/2 a tank, and then fill it back up. Then drive the vehicle as you normally would until you're once again at half a tank, then fill it back up again.
Your second fill up of gas will bring the concentration of 44K down to the equivalent of one can per tank. The third fill up will cut the concentration down to the same as 1/2 can per tank. The end result will be a far more effective cleaning on the dirty components while extending the length of time the cleaner is given dissolve the deeper encrusted grime. This can, however, be rather harsh on certain parts of the fuel system, especially the advanced measuring electronics that may be part of the fuel's pathways on certain vehicles.
Alternately, you can put in ONE can of 44K when at 1/2 tank of fuel, drive it until you're down to 1/4 tank, then fill it back up to 1/2 tank. This will minimize the time the electronics are exposed, while still getting the higher concentration across the injectors.
I've found the first method is convenient when going on a road trip, the latter better suited for yearly maintenance.
But nothing beats a full disassembly and manual cleansing of the entire upper engine intake and manifold.
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post #17 of 30 (permalink) Old 02-28-2019, 07:59 AM
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@noetico , that is a great idea. Nothing like a bit of ingenuity.

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post #18 of 30 (permalink) Old 03-01-2019, 04:36 AM
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It's an interesting tool, and I can see its merit, but it is far from the tool, or results, of the professionals.

For $17 an injector, Paul at Hurst Injectors cleaned the injectors in an ultrasonic tank, which removes all the deposits. Some deposits don't respond to solvents alone. He had to clean mine twice to get the results he wanted. He then flow tested them on his Bosch injector machine. So, for a less than the cost of the tool, the injectors were completely cleaned, and flow tested. All the injectors flowed within 0.5% of each other. As I said, a big improvement in smoothness and power.

Now, if the injectors on your car are truly buggered, well, then the tool above will make a difference and improve the situation. But improving the situation is not the same as achieving the best result.

That tool might get them completely clean, and might not. Further, there will be no measurement of cleaning effectiveness and no guarantee that the injectors will flow the same when complete.

This is a case where a professional really does make a difference.

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post #19 of 30 (permalink) Old 03-01-2019, 05:13 AM
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[quote=4DGeorge;17709390]
Quote:
Originally Posted by noetico View Post
My very own local injector cleaner.../QUOTE]

Now THAT'S what I call a plugged injector! Wow!
Your home made injector cleaner tool is the better choice for most Do-It-Yourself'ers out there.

A trick I learned from one of BG's vendors back in 1988 when I was first introduced to their products, is to put in TWO cans of 44K during gas\petrol tank fill up, drive the vehicle (that same day) until you're down to 1/2 a tank, and then fill it back up. Then drive the vehicle as you normally would until you're once again at half a tank, then fill it back up again.
Your second fill up of gas will bring the concentration of 44K down to the equivalent of one can per tank. The third fill up will cut the concentration down to the same as 1/2 can per tank. The end result will be a far more effective cleaning on the dirty components while extending the length of time the cleaner is given dissolve the deeper encrusted grime. This can, however, be rather harsh on certain parts of the fuel system, especially the advanced measuring electronics that may be part of the fuel's pathways on certain vehicles.
Alternately, you can put in ONE can of 44K when at 1/2 tank of fuel, drive it until you're down to 1/4 tank, then fill it back up to 1/2 tank. This will minimize the time the electronics are exposed, while still getting the higher concentration across the injectors.
I've found the first method is convenient when going on a road trip, the latter better suited for yearly maintenance.
But nothing beats a full disassembly and manual cleansing of the entire upper engine intake and manifold.


I'm so going to find a way to get this 44k. With all your testimony, this product must be fantastic! Thanks!!


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post #20 of 30 (permalink) Old 03-01-2019, 05:13 AM
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Quote:
Originally Posted by cowboyt View Post
@noetico , that is a great idea. Nothing like a bit of ingenuity.


thanks...


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