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Symptoms of a Bad or Failing Injector Control Pressure Sensor

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international maxxforce icp sensor location

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Please make the payment within 7 days after end of auctions. Thank you. Please make sure your shipping address is correct. Store category Sign Up Now! Delivery details We are not responsible for any custom duty or import tax Items will be shipped within 1 business day on payment received.The injector control pressure sensor is an engine management component that is commonly found on diesel engines.

As its name implies, it is an electronic sensor that monitors the fuel pressure going to the injectors. Diesel engines require an especially fine tuned fuel mixture, as they rely on pressure and temperature to ignite the fuel mixture, instead of a spark. The injector control pressure sensor detects the pressure of the fuel feeding the injectors, and sends that signal to the computer so that it can make the adjustments for optimum performance and efficiency. When there is an issue with this sensorthe signal can be compromised, which can lead to performance issues with the vehicle.

One of the first symptoms of a possible issue with the injector control pressure sensor is issues starting the engine. Diesel engines do not have spark ignition systems, and therefore require a finely tuned fuel mixture for proper ignition.

If the control pressure sensor has any issues, the computer signal to the injectors can be thrown off, which may lead to issues when starting the engine. The engine may require more cranks than normalor several turns of the key before it starts. Another symptom of a possible issue with the injector control pressure sensor is engine performance issues.

A faulty sensor can throw off the fuel mixture and cause the engine to experience misfiresa loss in power and accelerationa loss in fuel economyand in some cases even stalling. Similar symptoms can also be produced by other issues, so a proper diagnosis is recommended to be sure of the issue. If the computer detects an issue with the injector control pressure sensor or circuit it will set off the Check Engine Light to notify the driver of an issue.

An illuminated Check Engine Light can also be set off by a wide variety of other issues, so having the computer scanned for trouble codes is highly recommended. Injector control pressure sensors are more commonly found on diesel engines, however they can also be found on vehicles equipped with gasoline engines. If you suspect that you may be having an issue with the injector control pressure sensor, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the sensor should be replaced.

The most popular service booked by readers of this article is Fuel System Inspection. Our certified mobile mechanics make house calls in over 2, U. Fast, free online quotes for your car repair.

Schedule Fuel System Inspection. Service Area. Average rating fromcustomers who received a Fuel System Inspection. Starting issues One of the first symptoms of a possible issue with the injector control pressure sensor is issues starting the engine. Engine misfires and decrease in power, acceleration, and fuel economy Another symptom of a possible issue with the injector control pressure sensor is engine performance issues.

Home Articles.Once logged in and you have uploaded your resume, it takes only a single click to bookmark any type of our content. Bookmark this Unfortunately you need to be logged-in to use bookmark system. Login Register. The video tells the story on the running condition of this MaxxForce DT diesel engine.

International designed these engines to run on high pressure oil to hydraulically actuate each injector electronically by the on board computer which is separate from the fuel system which runs at 75 psi. This engine sounds like it's running on one cylinder but in reality one cylinder is dead with way too much fuel entering the cylinder.

To start these diesel engines they need 75 psi fuel pressure and psi injection control pressure supplied by the high pressure oil pump. At first it was a mystery so we had to decide what to check first. The only logical way to find this out was to pull all of the injectors for inspection.

The 6 injector turned out to be faulty only because of a failed seal washer which prevents compression to enter the injector sleeve in the cylinder head. The high pressure and heat proved too much for the o-ring seal on the injector body which keeps the fuel supply contained. Once the o-ring gave way compression entered the fuel supply system to the injector and aeration went into effect.

This causes a severe miss since air compresses and proper injection comes to a dead stop. Even worse every time the engine is shut down fuel would run into the cylinder sitting on top of the piston until the next start up smoking out the exhaust and washing away oil lubrication on the cylinder walls. This was a concern and now that we knew what the cause was it was time to think of a solution so it didn't happen again.

The photo above displays a couple of the injectors. What is left of the washer is laying beside the leaking injector. The sealing washer slides over the tip of the injector and is supposed to seal compression from entering the injector cavity. To avoid this from happening again we thought about the parts used to seal the injectors. They were aftermarket parts used out of the in-frame engine rebuild kit.

This engine was rebuilt a short time ago We noticed the new seal kits we acquired from the dealer was a much better quality. So in the future we will go with original manufactured parts for injector resealing and apply loctite threadlocker to the injector hold down bolt. It has a torque of 22 ft lbs and must not loosen off or this kind of failure will happen again.

international maxxforce icp sensor location

International diesel engine. MaxxForce 7 Engine Code Canada 86 Posts. Looking at the flow chart for no start and for checking low pressure it never asks to check what desired is when cranking only actual pressure.

Im thinking it does not factor in. The first test following low ICP pressure test is to install a pigtail to the ipr, connect 12 volts [for no more than seconds] crank for 20 secondsIf injection control pressure increases above 28 MPa psi 4.

I would probly get my scope on the wire leads to the ipr and want to see, is the ecm trying to control ipr or not. Or install a light with the same ohm value at the ipr and see if it light up again is the computer trying to control the ipr. Below I pasted the first part of low icp IH flow chart. I have never actually read it over all the years. One interesting thing is on list of possible causes they talk about pressure sensors for boost possibly causing a problem. Again the jumping of the ipr would verify its a electrical issue weather its a wiring issue, input issue to ecm or ecm issue and not a mechanical issue.

Good luck. Expense the spare ICP sensor and high-pressure hose as essential tools and keep it with other diagnostic tools. Warranty will not cover the cost of the spare ICP sensor and high-pressure hose.

Maxxforce dt

IPR valve 2. Disconnect engine wiring harness connector from IPR valve and inspect engine harness terminals and IPR valve for corrosion, bent pins, or pins pushed back. Retest injection control pressure. Do not connect engine harness. CAUTION: If the engine harness is connected to the actuator breakout harness, the ignition switch fuse will blow or cause damage to wiring harness.

international maxxforce icp sensor location

WARNING: To avoid serious personal injury, possible death, or damage to the engine or vehicle - comply with the following: While cranking the engine, the engine could start. Using the EST, monitor injection control pressure while cranking the engine for 20 seconds.

Record results on Diagnostic Form. Make sure problems were corrected. Continue with the next test, EOT sensor 1. Disconnect engine harness connector from EOT sensor installed in the rear of the front cover, left of the high-pressure oil pump assembly.

Slowly loosen the EOT sensor from the EOT port until oil flows out, indicating that the oil level is above the sensor. Oil will spill outif the sensor is removed. Catch oil in a container. If oil does not flow out remove sensor. Crank engine and check if oil flows out. See "Low Oil Pressure" in Section 4. Yea we are thinking electrical fault due to it not giving a desired readingthinking the actual icp system is ok just that the ecm isn't commanding press for the ipr system.

After the pump was installed bus ran and started fine. School Bus Fleet Magazine Forums. ANY help or suggestions appreciated thanks.

Hello if I had a bus would hook up scanner to a know good one and check what it say.Discussion in ' International Forum ' started by dcwjrOct 9, Log in or Sign up. Find Trucking Jobs. Maxxforce dt Discussion in ' International Forum ' started by dcwjrOct 9, Oct 9, 1. I have a maxxforce dt with intermittent severe driveabilty issues, active code of spn inactive codes spn fmi13 and spn fmi16 along with 9 others.

International laptop software gives us codes of dtc and spn fmi The unit runs fine as of this time and can't duplicate the issue. Have cleared and noted all codes and are trying to duplicate the issue, any ideas.

Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided. There is no charge for this service, but standard message and data rates may apply.

Oct 9, 2.

All the codes except forare ICP related. This is usually a bad sensor. High pressure leaks will usually cause hard or no start when hot, but the engine will run ok once it is started. The valve cover gasket and harness is the same piece. We usually change them if the engine has a lot of hours on it. You didn't mention if this is a emission or emission model because the engines are different. With both the ICP sensor is under the valve cover on the high pressure oil rail. HeavydOct 9, Oct 10, 3.

Its a model year. Oct 10, 4. Oct 10, 5. What do you think about the egr code- that was a koer test failure. Oct 10, 6. During that test the ecm is watching the air flow through the EGR valve by what the Exhaust back pressure sensor is reading. The test runs with the valve closed, then opens it and the ecm is expecting to see a change in the ebp, but doesn't.

The ebp sensor could be bad, the sensing tube could be plugged, or the egr valve not working. The ICP sensor is in the same location, under the valve cover, screwed into the high pressure oil manifold.

When you are checking the ebp sensor, remove the intake manifold pressure sensor too and check it for carbon plugging. HeavydOct 10, Show Ignored Content. Draft saved Draft deleted. Your username or email address: Do you already have an account? No, create an account now. Yes, my password is: Forgot your password?Our new search experience requires JavaScript to be enabled.

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Search refinements Categories. Automotive Sensors Fuel Inject. Fuel Injectors 7. Throttle Body 1. Fuel Pumps 1. Other 1. Air Intake Systems 1. Collectibles 4. Format see all Format. All Listings filter applied.Once logged in and you have uploaded your resume, it takes only a single click to bookmark any type of our content.

Bookmark this Unfortunately you need to be logged-in to use bookmark system. Login Register. This running test for injection control pressure ICP is a good test to run since these specs determine the fuel injection operation. These high pressures create problems if there is a leak in the high pressure manifold or anything else related in the system. The HPOP high pressure oil pump supplies the high pressure engine oil to the hydraulic operated injectors so if pressure drops the injection system will fail or run poorly.

Our shop has had some experience with low ICP which can be mechanical due to a faulty o-ring on an injector or high pressure manifold. One step for troubleshooting is applying shop air to the high pressure manifold which eliminates the high pressure oil pump all together. Shop air usually runs around psi so when that is hooked to the manifold inlet the leak will be obvious most times.

An ICP pressure sensor code will fool the engine computer with an incorrect reading which will derate the engine. Working with high pressures causes problems and seeks out all of the weak spots. With emissions the goal is to create high pressure fuel injection so combustion is cleaner reducing carbon and soot.

We are comfortable with the troubleshooting process on these systems but it takes time. The steps to get to the parts on the injection system adds down time due to the difficulty of removing the valve cover and high pressure manifold. Most emission controlled diesels have an array of harnesses and lines in the way when it comes to disassembling the top end. Two to three days is not uncommon for repairs to be completed. The cost could be excessive if injectors or sensor replacement is required.

We are constantly dealing with engine codes when ICP pressures are not within the parameters. The one advantage for us is we have dealt with all associated issues since they tend to repeat themselves.

Since there is no way we can bypass these faults and since they happen repeatedly the repair times are improving.

international maxxforce icp sensor location

Our tooling for repair is up to date and repair manuals are close by to help us out. Experience gives us the confidence to keep up with these repairs and maintenance is adjusted to improve operation and reduce break downs. It's another chapter in the school bus garage. Diesel Engine. MaxxForce 7 Engine Code


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