Caterpillar D398 marine engine - 1200 rpm Logo
Anonymous Posted on Aug 15, 2013

WHILE RUNNING SUDDENLY ENGINE STOP .THEN WE TRY TO START BUT NOT WORKING .WE CHECK INJECTOR IT IS WORKING .

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Renee F

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  • Caterpillar Expert 573 Answers
  • Posted on Nov 26, 2013
Renee F
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There are more than one injector, did you check them all for fuel point of delivery? make sure cyl 1 is at point of delivery when flywheel is at delivery mark. Did it make a noise when it stopped? You may have lost a timing drive train? Has the fuel rack been shutdown due to a control signal? Please check these things, along with obvious sensor inputs

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My car didnt start, did a diagnostic, picked up a railway sensor,replaced it,and car started,then said car is leaking diesel, take out block to remove injectors, injectors are back but not starting.

ll engines require three things to start and run: spark, fuel and compression.

If any one of these is missing, your engine will not start.

Basic Checks For Engine Will Not Start Are;

  • Check the Security System
  • Test Fuses
  • Check for Spark
  • Do you have Fuel
  • Check Engine Trouble Codes
  • Crankshaft Angle Sensor
  • Check for Injector Pulse
  • Check Cylinder Compression

So, like most people you checked the most important things first;

  • The fuel pump is running and delivering normal pressure to the engine
  • The engine has spark
  • There is good compression

But with all that working your engine will not start.

Engine Will Not Start-The most likely cause is that the fuel injectors are probably not opening.
Engine Will Not Start
The PCM uses the trigger signal from the crankshaft position sensor, and/or camshaft position sensor to pulse the injectors.
A worn-out belt can prevent the Crankshaft-Camshaft Position Sensor from synchronizing, causing the sensor to send the wrong signal.
When you turn on the key the injectors should receive battery voltage.
Also, the PCM driver circuit provides the ground connection to energize the injectors.
In extreme cases the PCM may have failed.
In some cases, a PCM problem will cause the vehicle not to run at all.
The PCM's functions include positioning the crankshaft and controlling the ignition spark and timing.
If there are problems with how the PCM performs these functions, the vehicle may not run.

First check for voltage at the injectors when the key is turned on.

  • No voltage?
The problem could be;
  • Blown injector circuit fuse
  • Bad fuel injector power relay
  • A fault in the wiring harness to the injectors
The injector fuse and relay are usually located in the relay box or power distribution center in the engine compartment. Fuses are used to protect various electrical circuits while supplying power to components. They help the fuel pump, fuel injection and computer systems from suffering a short circuit. When these fuses blow the system they support stops working and the engine stops running. As a result, The engine will not start. There are two methods of checking electrical fuses that protect various components.
You can either pull each fuse out and inspect it or use a test light to check its continuity. If there is a blown fuse check the system it controls. Once the system is identified inspect or replace the failed part and retry the engine. If the fuse still blows you will need to check the wiring harness for damage and repair it.
Voltage

If the fuse is okay, try swapping the relay with another to see if that gets voltage to the injectors.

  • No change?
Engine Will Not StartTypically, when injectors fail, the solenoids often short internally causing a drop in resistance. If the specification calls for 3 ohms and an injector measures only 1 ohm, it will pull more current. Too much current flow to an injector may cause the PCM injector driver circuit to shut down. As a result, killing any other injectors that also share that same driver circuit.
TIP: Try unplugging the injectors one at a time and cranking the engine to see if it will start. If the engine starts when a particular injector has been unplugged, that's the shorted injector that needs to be replaced.
TIP: You can also measure the resistance of each injector with an ohmmeter. Unplug the injector and measure the resistance between the two terminals. If resistance is outside specifications (high or low), replace the injector.Noid Light kitProfessional technicians use a tool called a NOID light to check injector pulses. The tool detects digital signals in a circuit and flashes an LED light. No flashes from the injector circuit when cranking the engine would tell you the PCM is not pulsing the injectors. On newer gasoline direct injection (GDI) systems, however, a NOID light is no help.
If the injectors appear to be working, but the engine will not start, the engine may be flooded. You may have to remove the spark plugs to let them dry. Wait awhile then try it again.
Note; You can also try holding the gas pedal all the way down when cranking. This will put the PCM into the "Clear Flood" mode when cranking the engine.
PLEASE SHARE ENGINE PORTAL NEWS
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Engine stops running like out of gas. Running like normal then all of a sudden just stops. Have been able to restart after a little while, but at first would crank, but not start. Only tried for a few...

Sounds like you are either losing injector pulses, fuel pump pressure, or spark pulses.

Before tearing into anything, check to make sure your battery and cables are in good shape. Then check for engine fault codes. Even if your check engine light is not lit, there may still be codes pending.
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I have a 94 audi 80 and the rpm gauge just stopped working and the check engine light came on. The car runs fine no issues, oul levels are fine but just the rpm gauge suddenly stopped working

Not sure what is causing it, but it sounds like you're running on 3 cyllinders. Check plugs, wires, timing . timing belt may have jumped, bad injector, low fuel pressure.

0helpful
1answer

Car stalled and will not restart

It is possible to have fuel pressure and have injectors that are completely closed. There are light testers that plug into the injector harness to check the pulse to open an injector. Available at autoparts with Tool loaner program.

Try starting fluid to see if it wants to run, If it does, then injectors are not opening, then find cause like camshaft sensor. At that point, like other Expert said, it could be Vacuum leak.

Will not turn over can mean several things. Is it cranking? Is it engaging and not moving the engine? If the starter is not moving then you have to go through the interlocks with brake pedal and shifter. But these work after the engine runs and would not cause it to stall.

Try the starting fluid and see if the spark is working, then shift to fuel delivery if it tries to start.
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My cbr600rr 2004 just running less than 4 k, and the this bike was rarely use by the first owner. i found the bike not run smoothly and i have all the injectors cleaned and so is the tank. The bike runs...

Id start at replace spark plugs.. too this bike may have sensors that tell an ECM info one of these may be out of spec after a set time or temp .. id get a manual & check the locations of them. In manual the often have a trouble shooting guide..
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deisel injector driver scan it look for multiple injector codes
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your fuel injectors may be clogged or your fuel sending unit may be operating for a while then cut off causing the fuel supply to the fuel injectors to not feed anymore fuel to the engine. check those out then write me back. [email protected] thanks.
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