Question about 1994 Mercedes-Benz E-Class

1 Answer

Loud Knock from Bosch pump at idle

I have A MERCEDES E 250 D with a 605 engine and have had the bosch pump serviced but there is a lot of knocking at idle rpm so would like to know the amount of diesel delivery at idle rpm and what is the pressure to be maintained for the pump.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 636 Answers

I'm not sure if that is a timed pump or not ? Could be that the timing is a little retarded an needs to be advance. Have you noticed an increase in black or blue smoke during acceleration ? could also be one of the injectors are not working properly at idle ? hope this helps.

Posted on Jul 29, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

We're you located the knock sensor in a 2004 land Rover Discovery ll


Knock sensors are almost always attached to the engine block. See here for more info
Knock Sensor Replacement BOSCH Engine

Apr 13, 2017 | Land Rover Cars & Trucks

1 Answer

Why is my 2002 Mazda Tribute making a loud knocking noise when I start it


loud knock and for how long

is it a diesel or petrol

broken engine mount

loud tapping is tappets ..should go away once oil reaches top of motor
water pump or bearing something running off drive belts

if high milage engine
a loud knock at engine revolution or half revolution
big end bearings or
piston slap or gudgeon wear

26303613-eolcmrc2k3afiywjhmzpes2a-3-0.gif

26303613-eolcmrc2k3afiywjhmzpes2a-3-1.jpg

Oct 07, 2016 | Mazda Cars & Trucks

1 Answer

I have a 2002 Nissan Frontier 3.3l v6 I'm about to change my knock sensor but I also need to change the camshaft position sensor but I'm not positive of where it is located it say bank 1??????


I'm willing to bet you have weak upper O2 sensors & there's nothing wrong with your knock sensor. But if you want, the knock sensor is under the lower intake manifold in the back that is located under the upper intake manifold also called the upper plenum. The lower intake manifold is wedged between the 2 heads and is an enormous pain in the azz to get to. You can check the O2 sensors with a scanning tool that will show you the upper sensors in bank 1 & 2 bouncing electrical current from about .5v to 5v several times per second. Anything less show weak sluggish sensors. The resulting lean mixture causes a knock. Change the sensors and the knock goes away and so does the engine light after you reset it. It took me 6 months to find this problem after replacing everything else including the 6mth old O2 sensors fresh from China. Now I have Bosch. PS The lower sensors went 2 weeks later & I was told any more problems it's the fuel regulator. 2001 Frontier 3.3l v6. No problems since, it purrs like a kitten. I'd suggest the Bosch, it's a special design for that 3.3l engine.

Sep 14, 2015 | Nissan Cars & Trucks

1 Answer

2001 isuzu tropper 3.5l 4x4 engine runs but loud knock changed oil and still has loud knock can i just change the oil pump or do i need to change whole engine


If you are hearing a loud "knock" and it is coming from the bottom of the engine you probably have a bad crankshaft bearing(s) which means engine rebuild or replacement.

Feb 19, 2011 | 2001 Isuzu Trooper

1 Answer

Car jerks with loud knock when shifting from park to drive


Ok the knock is your flex discs on the drive shaft are bad along with the carrier bearing. Replace before you get stranded or it comes loose.
Fuel distributor may need work if it is hard to start when warm, Replace OVP relay by battery also, its always an issue.

Nov 13, 2009 | 1987 Mercedes-Benz Mercedes Benz 190 Class

1 Answer

Engine knock hard over 2500 rpm


Does the oil light come on or the knock occur during the engine warm up after a cold start?
There could be a couple of problems causing the issue. You could have an oil pressure pump or pump pressure regulator sticking. I would have a mechanical oil pressure gauge installed and verify oil pressure at idle and 2500 rpms to make sure oil pressure is in normal ranges.
You could also have excessive piston rod bearing, crankshaft bearing or cam shaft bearing wear that will cause oil pressure to drop too low to prevent the rod knock your hearing at 2500 rpm.
You said a knock and not a ticking noise,so I don't believe a lifter is the issue at 2500 rpm.
Start with the oil pressure check and go from there.
Let me know.
Regards,

Aug 22, 2009 | 1996 Dodge Stratus

1 Answer

Is there a way to test an inline Bosch Injector pump off of a Mercedes 240D for output pressure ,without sending to a repair center ?


hi,they have a bench tester for testing fuel delivery,spray pattern,i think only calibration center would do testing, if your problem is only fuel knock,try to put some atf oil in your fuel tank,full tank,try one liter of atf,ty

Apr 13, 2009 | 1996 Mercedes-Benz C-Class

2 Answers

Engine knock


2002 KIa Senoda engine. If an engine is knocking it can be that the engine has low idle in fuel pump.because of some reasons that only less gas can enter the engine. that is why you have to adjust the fuel idle until the engine will not knock .

Mar 03, 2009 | 2002 Kia Sedona

Not finding what you are looking for?
1994 Mercedes-Benz E-Class Logo

209 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75066 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...