1992 190E 2.6 I6 - no fuel to the injectors and not starting - Mercedes-Benz Forum
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post #1 of 19 (permalink) Old 02-04-2019, 12:27 PM Thread Starter
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Date registered: Apr 2010
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Exclamation 1992 190E 2.6 I6 - no fuel to the injectors and not starting

I had this car running great for a while, and then it started to deteriorate - low, stumbling idle, black smoke. It got to the point where it wouldn't start anymore. Suspecting fuel, I checked pressure at either side of the fuel distributor. I have pressure at the fuel distributor, but no fuel to the injectors. They won't bleed either. I have replaced the fuel distributor and I still have the same problem. Next step? Is H.D. still here?

Thanks,
DD
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post #2 of 19 (permalink) Old 02-04-2019, 12:58 PM
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Quote:
Originally Posted by dd350 View Post
Is H.D. still here?
He posted this morning on Mercedes-Benz Roadster Forums > R/C107 SL/SLC Class


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post #3 of 19 (permalink) Old 02-10-2019, 11:46 AM Thread Starter
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Suggestions?
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post #4 of 19 (permalink) Old 02-10-2019, 12:43 PM
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Send H.D. a PM, he usually answers when he gets a chance.

Since you spent some time with fuel already, maybe you should look into ignition and mechanical issues?
Did you do the fuel injector stray test for each? I could not tell from your post.

I would also do your basics if you have not done them in a while:

(1) Ignition timing check with a strobe light
(2) spark test with a glow light
(3) Engine compression test

I would also put the car in limp mode to vindicate issues with the lambda control system.
If it starts running better (assuming your lambda adjustment was between 30% - 60% and not way off).
For this, I would disconnect the oxygen sensor under the passenger side carpeting.

Anyway, some suggestions here until H.D. responds.

- Cheers!
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post #5 of 19 (permalink) Old 02-12-2019, 12:12 PM
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If you have a stethoscope you can listen to each injector. When working well they will have a high pitched howl/scream. Found dead injector that way on my 500se. Also If you crack the line at the fuel distributor do you get fuel? If you push on the plunger with your finger, do you get more fuel? Or is the distributor putting fuel to the injector?
You can also use the inductive clamp on your timing light to look for spark at each cylinder. Just pull the trigger while engine is running..strobe means you have spark.
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Last edited by humblejoe; 02-12-2019 at 01:27 PM.
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post #6 of 19 (permalink) Old 02-14-2019, 09:25 PM Thread Starter
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So I've enlisted H.D. and he has recommended the following:

Quote:
If there is no fuel coming out of the injectors when you‘re cranking the engine, two things should be checked first in the following order:
- movability of the air flow meter & the FD‘s control plunger
- fuel pressure (system pressure & lower chamber pressure)

Please ask for detailed procedures in the forum. These are basic tests and there should be members who know how to properly do that.
I want to stress again that I have cracked the lines at the injectors, and the lines are bone-dry and not receiving any fuel from the fuel distributor.
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post #7 of 19 (permalink) Old 02-14-2019, 10:36 PM
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To the second point that HD made, you had posted in your opener that you had checked the upper and lower chamber pressures.

And what are the values?

Also, have you done his plunger test?
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post #8 of 19 (permalink) Old 02-16-2019, 03:43 PM Thread Starter
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No, I need clarification on the plunger test - I strongly suspect that at this point.
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post #9 of 19 (permalink) Old 02-17-2019, 10:26 PM
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Quote:
Originally Posted by dd350 View Post
No, I need clarification on the plunger test - I strongly suspect that at this point.
I think H.D. was referring to a test like the one described in post 26 of this thread:

https://www.benzworld.org/forums/w12...cycling-4.html

Please check it out.
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post #10 of 19 (permalink) Old 02-20-2019, 04:31 AM
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You want to go to the 107 section. Look up a thread by Bauk 18 titled - No start after fuel filter replacement. Bauk 18 has He's attention. It is an incredibly informative thread testing all the different components to the ke Jetronic. Your questions are addressed as well as the questions you are going to have!

IMHO I think we should have a dedicated section for KE JETRONIC. It is used in so many models and there is a wealth of info scattered among the different sections.
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