Share
Share on:

How To Check Fuel Pump Injection Timing

How To Check Fuel Pump Injection Timing
Source: en.wikimedia.org

A fuel injection pump is an important component of engines that operate on diesel fuel. A fuel injection pump is the part responsible for pumping fuel to the cylinders, that in turn determine the power that can be generated by the engine.

So why is a fuel injection pump and its timing important? The right amount of fuel and its timing are extremely critical because it regulates the combustion of fuel and the speed of the engine. Therefore, maintaining precise timing is important every time the timing belt of an engine has been replaced or adjusted.

You may also be interested in: How to Stop White Smoke from the Exhaust

How is Fuel Pump Injection Timing Controlled?

If you decide to do this yourself, it makes sense to first go through the user manual for the engine you are working on in some detail. If you have a newer diesel engine, its quite likely that the fuel injection system will be electronically controlled, so you will need to take it to an approved dealer to have the work carried out.

If it is an older diesel engine with a mechanical fuel injection pump, you will need to check for the type of crankshafts, pipes, cylinders, gears etc of your model. You should check before starting the work, as making adjustments to a fuel injection pump could present warranty voiding issues.

In order to ensure the timing is correct on a mechanical fuel injection pump, first rotate the engine to the top dead center (TDC) and engage the TDC timing pin with the camshaft gear. Then remove the timing pin access plug from the injection pump and verify if the slot in the pin will fit over the timing tooth of the pump.

Next, carefully replace the pump to correct the timing, adjusting and readjusting the timing pin and access plug in the injection pump. Lastly, disengage the timing pin from the camshaft gear. You may want to read more about when to replace your timing belt for more information.

What are the Symptoms of Engine Pump Timing Problems?

Incorrect fuel injection pump timing leads to reduced performance of the engine and can cause engine misfiring or other less obvious symptoms. It also causes over-consumption of fuel, excessive smoke production, loss of power and problems starting the engine as well.

So next time you feel your car is not running smoothly, misfiring or giving out excessive smoke, the fuel injection pump timing could be the culprit, so take it to your mechanic to get the problem diagnosed.

If you'd like to read similar articles to How To Check Fuel Pump Injection Timing, we recommend you browse around our Car Maintenance and Repair category.

Comments (13)

Write a comment about How To Check Fuel Pump Injection Timing

What did you think of this article?
13 comments
Bir Narayan Maharjan
Hi sir I need a Iveco Engine models 8210 how many Degrees BTDC fixed Fuel Injection Pump
Lesang Maitiyo
I dont have any coment or quaestion.i'm very happy for you education and i bag for more since i don't have fees for scolarship
OneHowTo Editor
We're glad this article was useful for you
Rating:
aziegbemhin jacob p e
excellent
Rating:
Munesh Kumar
How To Check Fuel Pump Injection Timing
Please tell me timing
Rating:
zahid
how to check fuel pump timing 1300 serial
Rating:
PHILLIP
HI,I NEED HELP ON HOW TO SET TIMING FOR THREE CYLINDER ENGINE .
Farzad
Hi, its two stroke or four stroke?
Rating:
Mario
by please, makes 2 months that have the vehicle arrested because not can get them data of put punto of your engine, OM XXX-XXX-XXX year 1993 M.Benz 290 GD (W461) box manual, if not is possible get them data them would appreciate any information to the respect. Best regards Mario
bizzit
I forgot to add that some of those symptoms can be caused as well by falty turbocharger...
bizzit
Actually the article mentioned symtoms which can be caused by many other things like wear on the rings, liner, piston - poor comression, burning of lube oil and excessive blueish smoke ; misfiring - faulty inj valve - seizing or leaking, ; dirty fuel filter - loss of power; problems with starting - poor compression, faulty heating plugs. The article isn't mentioning that some engines have inj timing advance unit of which a fault is more probable than the problem with misalignment of timing gears. Not helpful at all. What the hell means "running smoothly"? I hope it is not an engineering term. Usually if You have problem with inj timing on diesel engine You will have problems like whitish smoke "solid" like and not dissipating so easily - evaporated and not burnt completely fuel or too high exhaust gases temperatures.
Godfrey
Good day I had a problem with my BMW e90 320d 2010 I have replace a diesel pup from 2008 Bmw from there wen I exelarate the is a smoke so it is possible to do adjustment please help I don t enjoy my car anymore
bizzit
This article describes some ancient tech type of engines, not electronically controlled inj or "common rail" engines. Consult your mechanic.

How To Check Fuel Pump Injection Timing
Source: en.wikimedia.org
1 of 2
How To Check Fuel Pump Injection Timing