Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

My engine starts but doesn't run (idle). when i rev it a loud diesel knock appears and the check light comes on. i need help please

2 Answers

terry stevens

Cars & Trucks Master 991 Answers
Posted on May 23, 2015

terry stevens

Cars & Trucks Master

Joined: Aug 31, 2009

Answers

991

Questions

Helped

197236

Points

8536

Check the fuel pressure and if low change the fuel filter.

Steve Oakes

Expert 234 Answers
Posted on May 19, 2015

Steve Oakes

Expert

Joined: Mar 24, 2009

Answers

234

Questions

Helped

90513

Points

788

It sounds like a serious internal problem. Most likely a broken piston rod or spun main bearing. The car should be towed to a repair shop for professional diagnosis. A cheaper option would be to have a mechanic friend come by and take a look. Either way I would advise against driving the car or even running the engine except for diagnosis purposes.

pieter cloete May 23, 2015

Hi Steve. thanks for the response. I am a mechanic and maybe I never fully explained myself. the engine used to run but never had any power, something to do with the pump not powering the turbo. I sent it for repairs and fitted it back. when you crank the motor , she'll start but cut out. there is a large some of white/greyish smoke that appears. is it maybe my pump timing?
do I need to retard or advance it?

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

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

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

1helpful

1answer

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

loud knocking can be the timing has gone out so don't drive or start engine till its checked. https://roadmasterengineworld.com/2018/03/timing-gear-caution-on-2011-2016-ford-6-7l-diesel-engines/
loud tapping can be the pistons hitting the valves. engine light could be on because the knock sensor is activated. this will put engine in low rev limp mode to try and limit damage, either way it need looking at to find the fault. other cause can be oil pressure/flow is not correct. or the valves are in need of adjustment. can also be the engine has become out of balance.

Read full answer

Apr 27, 2018 • Cars & Trucks

0helpful

1answer

Mechanical help?

A loud knock is almost always a piston or bearing problem, or liquid in one of the cylinders that can not compress such as coolant.

Read full answer

Jan 17, 2013 • Cars & Trucks

0helpful

1answer

1997 nissan serena diesel 2.0 van it starts and idles, may rev, then engine light comes on and it wont rev ?

If the "engine light" turn on, scanned the computer car in order to know what fault code is stored there, then could start directly with this issue.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Read full answer

Aug 16, 2012 • Cars & Trucks

0helpful

1answer

Hi im drving a 2008 FSS 550 4x4 truck.Drving yesterday and the the engine warning light came on a few seconds later the truck lost speed and revs and seemed to trip into a limp home mode.It wouldnt rev...

call douggy from trucktech he can bypass the system

Read full answer

Mar 14, 2012 • Isuzu Cars & Trucks

0helpful

1answer

I have a 2004 hilux 1kz-te turbo diesel. its suddenly made a vr loud tapping noise sounded like a belt broke but all belts including timing belt are all in one piece. the engine was cold and driven for...

Hi Gdw, I would have liked you to have given more details, such as, is the sound from start up and through the rev range, or does the knocking sound come at a certain rev range. I'm suspecting that the timing belt may have jumped and the valves are coming into contact with the pistons. The second suggestion is that combustion is escaping through a broken glow plug. If the injection timing has jumped and is out of phase that would also give a knocking sound. I think it would be advisable for you to have the valve and injection timing checked very urgently. It could be a tappet which has become loose, but as they are shimmed I doubt that could happen, unless a shim was not fitted correctly. Regards Johngee10

Read full answer

Jul 17, 2011 • Toyota 4Runner Cars & Trucks

3helpful

2answers

Peugeot 406 1.9td rev counter is fluxauting and there is a loud diesal knock at idle

This problem is caused by the injector which the wire for the rev counter pick up comes out of. Check your injectors then remove the one with the wire coming out of it clean and replace. If this doesn't sort both rev counter and knock get a replacement injector. I did this job a few months ago a little bit of stripping down is required but there were no real gotcha's apart from the injector needing to be put back in the head very tightly to prevent fuel leak. Hope this helps.

Read full answer

Jan 14, 2010 • Peugeot 405 Cars & Trucks

3helpful

2answers

Growling engine noise only at idle. Cam area

Take all of the belts off for a short run at idle. If the sound goes away it is pulley related, spin each pulley and listen for bearing noise, also check for play at this time.

If the noise does not go away when the motor is driving no accessories you have a more serious problem.

Read full answer

Jan 13, 2010 • 1991 Oldsmobile 88

4helpful

2answers

Knock in engine

it can also be an injector. injectors tend to supply more diesel after long service. To check if this is the problem: let the motor idle whilst it knocks. start from the front of the motor- loosen no1 injector fuel line- the motor will start idling roughly as fuel supply to no1 piston is starved. If the knock persists, tighten the fuel line and move to no2 injector and repeat the process. the knock will gradually go away if one of the injectors' fuel lines are loosened and the injector is faulty. If you get 1 or more injectors with these symptoms, remove and replace the injector. If the problem persists, it can either be that one of the diesel pump plungers are worn and supplies too much fuel or a big end bearing is faulty.
RegarsCarel de BeerSouth Africa

Read full answer

Apr 06, 2009 • 1991 Toyota Celica

0helpful

2answers

Engine knocking.

Hi,my 92 prado started making a knocking sound recently,we couldn't pin it down to one spot in the engine.
The knocking was constant at low revs and then disapeared.
Turned out to be the tourque converter knob had bust of and eventually destroyed the fly wheel and the transmission pump.
Definatley check under top cover and also drop off the sump to check for loose nuts etc.
hope this helps.

Read full answer

Dec 27, 2008 • 1992 Toyota Land Cruiser

0helpful

1answer

Voyager 2001 diesel - uneven idling, lumpy on low revs

Have the diesel fuel pump replaced

Read full answer

Oct 26, 2017 • 2001 Chrysler Voyager

Not finding what you are looking for?

View Most Popular

Cars & Trucks

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

Cars & Trucks

71 views

Ask a Question

Usually answered in minutes!

Related Topics:

Trustworthy Expert Solutions

My engine starts but doesn't run (idle). when i rev it a loud diesel knock appears and the check light comes on. i need help please

2 Answers

terry stevens

Steve Oakes

Add Your Answer

Attachments: Added items

Related Questions:

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

Mechanical help?

1997 nissan serena diesel 2.0 van it starts and idles, may rev, then engine light comes on and it wont rev ?

Hi im drving a 2008 FSS 550 4x4 truck.Drving yesterday and the the engine warning light came on a few seconds later the truck lost speed and revs and seemed to trip into a limp home mode.It wouldnt rev...

I have a 2004 hilux 1kz-te turbo diesel. its suddenly made a vr loud tapping noise sounded like a belt broke but all belts including timing belt are all in one piece. the engine was cold and driven for...

Peugeot 406 1.9td rev counter is fluxauting and there is a loud diesal knock at idle

Growling engine noise only at idle. Cam area

Knock in engine

Engine knocking.

Voyager 2001 diesel - uneven idling, lumpy on low revs

Not finding what you are looking for?

Cars & Trucks

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

Ask a Question

Check Out the Latest Top Trucks Report!

Top Cars & Trucks Experts

ZJ Limited

john h

Arnie Burke

Are you a Car and Truck Expert? Answer questions, earn points and help others

Manuals & User Guides

DIS9_Full.pdf. user-manual-1994...

DIS9_Full.pdf. user-manual-1994...

Rhonda_Docs.pdf. user-manual-2001...

Related Topics:

Trustworthy Expert Solutions

My engine starts but doesn't run (idle). when i rev it a loud diesel knock appears and the check light comes on. i need help please

2 Answers

terry stevens

Steve Oakes

Add Your Answer

Attachments: Added items

Related Questions:

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

Mechanical help?

1997 nissan serena diesel 2.0 van it starts and idles, may rev, then engine light comes on and it wont rev ?

Hi im drving a 2008 FSS 550 4x4 truck.Drving yesterday and the the engine warning light came on a few seconds later the truck lost speed and revs and seemed to trip into a limp home mode.It wouldnt rev...

I have a 2004 hilux 1kz-te turbo diesel. its suddenly made a vr loud tapping noise sounded like a belt broke but all belts including timing belt are all in one piece. the engine was cold and driven for...

Peugeot 406 1.9td rev counter is fluxauting and there is a loud diesal knock at idle

Growling engine noise only at idle. Cam area

Knock in engine

Engine knocking.

Voyager 2001 diesel - uneven idling, lumpy on low revs

Not finding what you are looking for?

Cars & Trucks

2014 F350 diesel 6.7 92,000 mi. Check engine light, suddenly runs very rough when idling and loud engine knocking. Any idea of the cause?

Ask a Question

Popular Questions

Toyota dashboard CD player won't eject

4.3 Firing order diagram for 4.3L v6 Chevy engine

BMW X5 Trans Fail Safe Program,

Diagram of 1996 ford ranger fusebox which fuse is

What does my check engine light trouble code $7e8 mean?

Check Out the Latest Top Trucks Report!

Top Cars & Trucks Experts

ZJ Limited

john h

Arnie Burke

Are you a Car and Truck Expert? Answer questions, earn points and help others

Manuals & User Guides

DIS9_Full.pdf. user-manual-1994...

DIS9_Full.pdf. user-manual-1994...

Rhonda_Docs.pdf. user-manual-2001...