KE-Jetronic fuel pressure regulator

KE-Jetronic fuel pressure regulator - ONE MORE TIME

Рет қаралды 9,921

2 жыл бұрын

Пікірлер: 50

@mr.kaufman2970 2 жыл бұрын

It's not a vacuum line folks, just a vent line to the air intake so as not to vent fumes into the engine bay!!! If I could super like this video, I would!

@TOONACEDRELA 2 жыл бұрын

I've given up on this issue. I am reminded of the wit of Oscar Wilde in his famous play, 'The Importance of Being Earnest.' Lady Bracknell : "ignorance is a delicate flower. Touch it, and the bloom is gone. Fortunately, in this country, education produces no effect whatsoever."

@mikebaz7843 Жыл бұрын

Probably repeating a rare case, but just keep the regulator in mind if you have a constant long crank time yet smooth start at any engine temp. It was instantly dumping all fuel pressure as soon as the engine was shut off, but no external leakage from the vent tube (on my M117 anyway). All the usual culprits, injectors, accumulator, pump check valves and plunger sealing were perfect.

@shaazy 11 ай бұрын

You're describing the exact symptoms on my '91 w124 m103. Cold start in the morning is long crank. But if I shut engine off soon, and restart, the start is yummy and instantaneous. Add to that, an on-again off-again fuel smell in the cabin. Inspecting the regulator shortly!

@gerryvanzandt7894 2 жыл бұрын

The "Vent" (#52) is for the direction of fuel in the case of the internal diaphragm being ruptured, so that fuel is not released onto the top of the engine/intake manifold area. This "vent," which is made of a piece of vacuum line attached to a black rubber nipple, has NOTHING to do with any vacuum. It is really a safety thing so that raw fuel is not spilled. I contrast this with the M119 that uses LH-Jetronic & the M104 that uses HFM, which employs a much smaller fuel pressure regulator with internal diaphragm, which DOES have an external vacuum connection that DOES control it in part. But these are VERY VERY different than KE-Jetronic systems, which DO NOT USE VACUUM to control the diaphragm pressure regulator. Anyone saying anything else, is, well, an idiot who does not know what they are talking about. Simple as that.

@MMWA-DAVE 2 жыл бұрын

yep, but it STILL happens, and jackasses like this talk with such authority and end their comments with Duh. If someone is going to shoot their mouth off they should at least have a clue about what they are talking about 😂

@peterarvaszulu5069 2 жыл бұрын

Well explained thanks

@siriperera6974 8 ай бұрын

@@MMWA-DAVE I had a regulator with a leaking diaphragm and fuel that got past the diaphragm and would spew fuel into the air filter compartment and the engine. I think the diaphragm maintains fuel pressure in the engine. Please, from where did you get the manual. I could do with it to consolidate information in brain-mind. No mechanics around here know nuts about KE-jets, and I need to learn to fix this car myself.

@malaifaizul 8 ай бұрын

HAHAHAHAHAH Crittens! Bro, i just got my 230e W124 and im reviving it, got a lot of help from your videos. Thank You! But 'Crittens' hahahaha that has a rent free space in my brain. Awesome videos bro, keep at it. (I specifically searched for this video to finally send u this message)

@ebutuoyebutouy 2 жыл бұрын

Thank u for sharing. Stay safe.

@pedroreis2861 2 жыл бұрын

I just want to say you are absolutely right. And the car can run without de vent tube its changes nothing. Its simpel has it get .the vebt Its only security system if the regulator goes faulty and send the petrol to the engine and not on the floor or catching fire. And thanks for your videos. I really like to change some ideas with you, if you have some time one day.

@chrismartin_101 2 жыл бұрын

I've seen the same information freely available online before and totally agree with you. I think people become confused because Mercedes use the same tubing for the that particular vent and the rest of the vacuum system.

@MMWA-DAVE 2 жыл бұрын

regarding the freely available subject- it is getting harder for the general population to get it unfortunately. I have seen MB actively target sites sharing the service manuals etc and demanding them to be taken down. I couldn’t even have what information I have these days if I had to start over again without paying for a VPN service. I am currently in the process of doing a major and costly upgrade to secure my offline data.

@hadef1977 2 жыл бұрын

Any compressed thing the outputs was be said (vent) , and suction and air intake as means that was be said ( vacuum) , you are right 👏

@eclipsehunter303 2 жыл бұрын

Love this

@chellingworth 2 жыл бұрын

Perhaps the confusion arises because vacuum does affect fuel pressure on the HFM systems of later M104.99X and M111 engines. Even so, I'm no fan of spreading misinformation 😉

@mikemike-ym9pb Жыл бұрын

Enough said!

@Mike_Costello 2 жыл бұрын

I found this video by Pierre Hedary sitting at his kitchen table with all the KE components in front of him doing a live video on how the KE-Jetronic system works from end to end. It's worth a watch. Special guest is his wife turning off the kitchen light on him and telling him to calm down when he gets annoyed she did that. That's right after he shows the fuel pressure regulator at 14min 15 secs kzfaq.info/get/bejne/sL56ntl1mdjOgH0.html

@MMWA-DAVE 2 жыл бұрын

I have all the manuals and already know how it works 😁

@Mike_Costello 2 жыл бұрын

@@MMWA-DAVE That I do not doubt!

@cnstars124 2 жыл бұрын

This thread is not about how it works or showing how it works. It is simply a statement of I'm right, I'm right, I'm right. I enjoy the site and am glad your right.

@MySpeed12 14 күн бұрын

I have this on my '92 Audi 100 2.0e KE-Jetronic system, hard starts but once it ran it starts fine, Im assuming this is the part that's failed and it's not available anywhere! Really annoying!

@r3FMusic Жыл бұрын

Thanks..

@tomaslipnevicius2653 2 жыл бұрын

Intresting thing with my M117, I saw that this line not connected anywhere so after googling I connected it to breather hose coming from valve cover and car strugled to accelerate after that, disconnected again, car accelerated normally again.

@knut5328 2 жыл бұрын

i have never understood why some people takes "you're wrong and here is why" as a personal attack. one would think being corrected and becoming more knowledgeable is a good thing.

@shaazy 11 ай бұрын

Thank you for this. I'm tracing a very evasive fuel smell that comes into the cabin after 2-3 minutes of the engine being on. I can smell it as I drive. The fuel tank side of things, and all possible age related ailments check out okay. Of particular interest is this vent line behind the fuel pressure regulator, and thanks to this video, I can dig a little deeper. My crankcase breather pipe has a crack where the clip holds it to the valve cover. The theory in my head is, the regulator is venting to the breather pipe as I drive, and perhaps that's coming into the cabin through the center vents. Just one question, is this vent line supposed to emit any fuel vapors in normal operation, or only when the regulator diaphragm is ruptured?

@mikebaz7843 11 ай бұрын

If the vent line has any fuel in it, the regulator diaphragm is toast. I've seen the vent tube spewing fuel out onto the inlet manifold when disconnected from the crank vent hose on another car with the engine running. Check for brown stains near the EHA too, as they can weep sporadically and make smells

@shaazy 11 ай бұрын

@@mikebaz7843 I dug in yesternight. Couldn't see any sign of fuel wetness or smell at EHA (thank the lord, they're not cheap), nor the fuel pressure regulator vent line. Didn't disconnect the line but, disconnected the breather pipe from cam cover, and stuck my nose well in there with engine off after running it for a couple of minutes. This morning I remembered another video where MMWA's fuel distributor was leaking beneath the airflow meter, but forgot to check that. I sure hope that isn't it, cause I also adjusted the full-throttle stop via accelerator cable yesterday, stuck half a bottle of chevron high mileage cleaner, and went for a spin. And it's spinning the wheels from 1st to 2nd! Really don't wanna mess with the distributor considering how well she drives!

@shaazy 11 ай бұрын

@@mikebaz7843 Well, just got done inspecting the air flow meter. Pressed it gently with my finger, stuck my nose in, and could smell fuel :( ... this isn't good. Now what do I do =/

@pdiseris 10 ай бұрын

Would you be happy to link us to where we could download these manuals? Thank you

@apexseal2811 2 жыл бұрын

Where can I get my hands on such manuals?

@edups3307 4 ай бұрын

Where can I get that manual?

@andrewcouper9276 2 жыл бұрын

I have the same system on my lancia and yes it’s just a venting port that’s it nothing else

@meporfo66 2 жыл бұрын

This ventilation connection has the same function as the connection on the accumulator. If the diaphragm leaks inside, the escaping fuel will be sucked out by the vacuum in the intake manifold and burned as well...

@theundergroundlairofthesqu9261 Жыл бұрын

Well, besides all that and the fact that the hard tubing leads to crankcase breather system as it feeds fumes to the air filter and has no vacuum to give, what's your point? 😀

@imprezaleganes 7 ай бұрын

At least vents out fuel or check for vacuum you can know it is in good condition i think, without any leaks

@vmlelectronics Жыл бұрын

Bro, I have a doubt about these fuel inputs: are the pressures equal? Is it possible to use another 2 input regulator set to 6 bar, similar to the Ford Ranger? Or even 2 different 6 bar regulators joining the fuel return? The cost of the Bosh is absurdly high in Brazil due to the dollar valuation and mail... I don't use to push much power to the engine, most of the time I keep below 3k rpm.

@MMWA-DAVE Жыл бұрын

i have not experimented with universal type fuel pressure regulator. It could work in theory, as long as it is a fixed single pressure while the engine is running, ie, does not increase pressure based on engine vacuum. The plumbing could be a nightmare though.

@vmlelectronics Жыл бұрын

@@MMWA-DAVE yes, I think the contending guy was thinking about this vacuum variable type but I could simply leave the vacuum line disconnected or put it at the same place as the original; my concern was exactly about the side inputs, if there is any different parameter of pressure for each one or if they are simply connected inside the regulator's barrel... 👍🏻

@vmlelectronics Жыл бұрын

@@MMWA-DAVE about the plumbing, I thought about making jigs to keep the car with the original fittings and place the new regulator somewhere else around there

@hojjatzare2483 2 жыл бұрын

Hello, do not be tired. I'm a Mercedes w124 230e m102 I have a problem with engine wiring. In my country, there is no wiring diagram, if you can help me. Thank you.

@aliem.1448 2 жыл бұрын

A vacuum line that goes straight into the air intake, and which has no effect on running engine whatsoever if taken out 😂

@erixx297 2 жыл бұрын

Haha ofc some ibrahim commented without knowledge. Where is he now? He should declare himself beaten since he didn’t “win”

@tm199100 2 жыл бұрын

What do you know about this? You are only reading it from the factory manual…

@tm199100 2 жыл бұрын

@@MMWA-DAVE it was just sarcasm, sorry

@MMWA-DAVE 2 жыл бұрын

@@tm199100 sorry, i thought you were another vaccuum believer. I shall correct my response

@tm199100 2 жыл бұрын

@@MMWA-DAVE not at all. I don’t know the first thing about jetronic systems of any type. They were not super common here. Mercedes of this era, for example came almost all in diesel flavours. Hence why i love the content on this channel.. it full of accurate and reliable information and some of the comments are really knowledgeable..