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Hey!
I've just gotten a p0205 code, injector problem on cylinder 5. I've spent some time trying to find instructions how to replace but found none. Anyone here done it?
 

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Hey!
I've just gotten a p0205 code, injector problem on cylinder 5. I've spent some time trying to find instructions how to replace but found none. Anyone here done it?
Welcome Hudene


What engine do you have in your Nitro? Is it a 2.8l CRD?
 

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Discussion Starter #5
Gas 🙂


Hey!
Thx for reply in my thread concerning code p0205. I dunno what happened tho, since it seems my replies cant be read. I can see them myself when i browse the thread. I have a 4.0 R/T.
Best regards.
 

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Hudene

Can you see what you are posting? Don't know what 🙂 is but I guess you have a gas 3.7 engine?

P0205 code definition

Injector Circuit Malfunction - Cylinder 5
What the P0205 code means

P0205 is a generic diagnostic trouble code which indicates that the injector circuit for cylinder 5 has out of range voltage or resistance. This is detected by the Engine Control Module (ECM) as it tries to control the circuit.

P0205 can be seen with misfire, and lean/rich condition codes.

P0205 is similar to P0200 - P0202, P0204, and P0206-P0212.

What causes the P0205 code?


Shorted or open wiring harness
Fuel injector cylinder 5 is faulty
ECM has failed
Faulty electrical connection

What are the symptoms of the P0205 code?

Check Engine Light is triggered by the ECM and observed on the dashboard
Failsafe mode (precaution to prevent damage to the vehicle) is enacted by the ECM
Failsafe mode remains in effect until normal operation is detected or the fault is fixed
Gas mileage is poor
Fuel system has lean or rich condition
Engine has a lack of power
Engine runs roughly, poorly, or dies while running
Vehicle is hard to start or does not restart once it has died

How does a mechanic diagnose the P0205 code?

Hooks up a scan tool into the OBD-II port to find any codes that may be stored in the ECM

Observes freeze frame data associated with each code (codes will either be Pending or Active)

Clears codes and performs a test drive using information obtained from the freeze frame data to duplicate the conditions that were present when the code was set

If the P0205 code returns, performs a visual inspection of the injector circuit

Uses scan tool to monitor voltage and resistance found at cylinder 5 fuel injector; checks for proper voltage at the fuel injector itself

Uses a noid light to monitor the on/off pulse of the fuel injector

Performs a test of the ECM

Common mistakes when diagnosing the P0205 code

Mistakes can easily be made by anyone if they skip steps or do not complete all steps required. These steps should always be followed to avoid unnecessary repairs, and save time and money.
How serious is the P0205 code?

P0205 can have some symptoms that are cause for concern such as the engine dying while driving. A vehicle with these issues should not be driven and should be diagnosed as soon as possible for safe driving.

2009 Dodge Nitro 3.7 firing order

Engine is misfiring, check engine code said cylinder 5, prob ignition coil and would like to change the coil but I cannot locate the cylinder numbers do you have a diagram so I can locate the correct coil?

 

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Disconnect electrical connector at fuel injector. Push red colored slider away from injector (1). While pushing slider, depress tab (2) and remove connector (3) from injector.

OPERATION
FUEL INJECTORS


The top (fuel entry) end of the injector is attached into an opening on the fuel rail. See Fig. 94.
The fuel injectors are electrical solenoids. The injector contains a pintle that closes off an orifice at the nozzle end. When electric current is supplied to the injector, the armature and needle move a short distance against a spring, allowing fuel to flow out the orifice. Because the fuel is under high pressure, a fine spray is developed in the shape of a pencil stream. The spraying action atomizes the fuel, adding it to the air entering the combustion chamber.
The nozzle (outlet) ends of the injectors are positioned into openings in the intake manifold just above the intake valve ports of the cylinder head. The engine wiring harness connector for each fuel injector is equipped with an attached numerical tag (INJ 1, INJ 2 etc.). This is used to identify each fuel injector.

The injectors are energized individually in a sequential order by the Powertrain Control Module (PCM). The PCM will adjust injector pulse width by switching the ground path to each individual injector on and off. Injector pulse width is the period of time that the injector is energized. The PCM will adjust injector pulse width based on various inputs it receives.
Battery voltage is supplied to the injectors through the ASD relay.
The PCM determines injector pulse width based on various inputs.

FUEL INJECTORS - PCM OUTPUT

The nozzle ends of the injectors are positioned into openings in the intake manifold just above the intake valve ports of the cylinder head. The engine wiring harness connector for each fuel injector is equipped with an attached numerical tag (INJ 1, INJ 2 etc.). This is used to identify each fuel injector with its respective cylinder number.

The injectors are energized individually in a sequential order by the Powertrain Control Module (PCM). The PCM will adjust injector pulse width by switching the ground path to each individual injector on and off. Injector pulse width is the period of time that the injector is energized. The PCM will adjust injector pulse width based on various inputs it receives.
Battery voltage (12 volts +) is supplied to the injectors through the ASD relay. The ASD relay will shut-down the 12 volt power source to the fuel injectors if the PCM senses the ignition is on, but the engine is not running. This occurs after the engine has not been running for approximately 1.8 seconds.
The PCM determines injector on-time (pulse width) based on various inputs.

REMOVAL
FUEL INJECTORS


Disconnect clip(s) that retain fuel injector(s) to fuel rail

Install fuel injector(s) (3) into fuel rail assembly (4) and install retaining clip(s) (2). 2. If same injector(s) is being reinstalled, install new O-ring(s). Two different O-rings are being used. These can be easily identified by color. Install black O-ring at intake manifold end of injector. Install red/rust colored O-ring at fuel rail end of injector. 3. Apply a small amount of clean engine oil to each injector O-ring. This will aid in installation. 4Install fuel rail. See INSTALLATION. 5. Start engine and check for fuel leaks
 

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Jun 11, 2017

This video shows you how to change your own fuel injectors and save tons of money. This is done on a 2006 Jeep Liberty, but for the most part it is generally the same procedure on other vehicles. Just be sure to always check for fuel leaks before you put everything back together by pressurizing the fuel rail if this is possible on your car.
 

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Mopar 4591986AA New Multi Port Injector



This fits your:
2007 Dodge Nitro
R/T
4.0L V6 Gas


The 4.0L Liter (244 Cubic Inches) 60° V-6 engine is a single overhead camshaft design with hydraulic lifters and four valves per cylinder. The engine
does not have provisions for a free wheeling valve train.


 

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Discussion Starter #11
Wow! Tank you so much, this is really helpful. I've ordered parts from the states (I live in sweden) and will update my progress once I start 🙂
 

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Fuel Injector Cleaners:

Fuel Injector Cleaners: Everything You Need to Know


Fuel injector cleaners are an important part of maintaining your engine to ensure it's running at maximum smoothness and efficiency.



Jul 06, 2018


Taking care of a car or truck engine is a task that we almost always assign to our mechanics, which is expected – you can’t really do much on your engine nowadays, besides checking the oil and coolant levels. However, going to a mechanic can be very expensive, even if the problem you have often requires a simple solution.

One of the most common problems with any fuel injected engine is that the injectors that bring the fuel to the combustion chamber can get clogged up. If you think about it, these are one of the vital parts of the engine – no fuel in the chamber means no combustion and consequently a car that will lose its power, have worse fuel economy and increased emissions.

If you’ve never experienced your engine losing power even if it was regularly maintained, you are one of the lucky few. Clogged up fuel injectors are so common that every auto-part shop has dozens of different so-called “Fuel Injector Cleaners” that purportedly can clean your entire fuel system and make your engine work like new again. That is if it doesn’t have other problems already.

Here we’ll talk about everything you need to know about fuel injector cleaners and we try to answer every question you have, like why they are needed in the first place, how to use them, should you use them yourself or go to a mechanic and so on.



How do fuel injectors work?


Fuel injectors are one of the most important engine parts that are used to introduce fuel to the combustion chamber, where it is mixed with air and then combusted to create power. The injector receives the fuel from a high-pressure fuel pump and thanks to a very small nozzle, atomizes the fuel in very small particles so it can mix with air quickly.

The best analogy we can think of is a deodorant – a bottle already under pressure that has a small nozzle that atomizes the liquid into very small particles. The fuel injector works much in the same way, with the only difference being that here the nozzle is even smaller and the injected fuel is almost misty in appearance. Newer injectors for direct injection engines even have several nozzles on the tip to help for a better air-fuel mixture.

This is the way that every new internal combustion engine gets the fuel into the chamber, regardless if it’s a gasoline or diesel burner. The process is controlled by the ECU (the car’s computer), so the injector will always supply the fuel right when the engine needs it. Timing is very important, as injecting fuel too early or too late can cause the engine not to work as expected or even damage it.

Considering the injector is a very delicate part, with very small canals and constantly under high pressure, it needs almost ideal working conditions, like extremely clean fuel and in the case of direct injection systems, clean nozzle tip, and a clean combustion chamber.



How are fuel injectors getting clogged up?


Expectedly, the gasoline and diesel fuels that we put in our cars are never as clean as it should be. Apart from small deposits, the fuel that we get today has small amounts of water and some octane-boosting ingredients.

All of these things can have detrimental effects on the fuel injectors, but the number one enemy is definitely carbon build up. This is something that happens to every engine with time – during the process of combustion, the majority of the carbon leaves the engine through the exhaust system, but some of it stays in the combustion chamber and in time it can block the passages of fuel and air-fuel mixture. Add to that the possibility of the injector rusting from the water in the fuel and some byproducts from the octane-boosting Ethanol that is being widely used today, and with that your car can start losing power and consume more fuel in no time.

What does a fuel injector cleaner do?

Fuel Injector Cleaners are additives that are meant to clean all those deposits in the injector as well as in the combustion chamber and help your engine work in optimal conditions, with the right air-fuel mixture. Think of them as detergents for your fuel system.

These cleaners can clean the inside of your injector, but also the carbon builds up in the combustion chamber, behind the intake valve, around the spark plug etc. All of them have active ingredients that help dissolve the deposits into much smaller pieces and then the engine itself ejects them through the exhaust system.


How does it work?

Fuel injector cleaners are a mixture of complex chemicals, most of them solvents that can easily clean deposits. The main cleansing agent of these additives is a chemical called PEA or polyetheramine, which is a nitrogen-based detergent that is great at dissolving carbon deposits. In addition to that, PEA is very resistant to high temperatures, which makes it great for cleaning the fuel injector as well as deposits in the combustion chamber, where the temperature can go up to 1200 °F.

Some cleaners contain other chemicals that the manufacturers claim it makes them superior to others, but scientific studies have shown that polyetheramine is best at cleaning carbon build up and you should always look for additives that contain this chemical.


What to look for in a fuel injector cleaner?


Always look for a fuel injection cleaner that contains the detergent Polyetheramine (PEA), as it is the strongest cleaning agent. Some of the cleaners will have Polyisobutene (PIB), that helps remove water from the fuel and Polyisobutylene amine (PIBA), which is also a cleaning agent, but not as strong as Polyetheramine. Older fuel injector cleaners even have alcohol in them for water removal, but they can damage parts of the fuel system and are best do be avoided.

When do I use fuel injector cleaner?

These cleaners are the easiest to use among any other engine additives on the market. They should be poured into an almost empty tank of fuel just before you fill up at the gas station and then the tank should be emptied by leaving the engine to idle or by driving the car.

This means that they don’t work right away – you need to drive several hundred miles before you can feel the difference. Anyway, always read the instructions on the bottle – some bottles of cleaner are for only a small amount of fuel so maybe you’ll need more than one for a full tank.

If your car was not cleaned for a long time and it has a lot of carbon deposits, one full tank of gasoline or diesel and a bottle of fuel injector cleaner might not be enough to effectively clean the injectors and the combustion chamber. When that’s the case, simply put another bottle of additive in an almost empty tank of gas and empty it by driving.


How often should I use fuel injector cleaners?

There is a difference in opinion on this topic. Some mechanics will advise you to use a fuel injector cleaner every year, or every 12,000-15,000 miles, before the oil change. Additive manufacturers will even instruct you to use it every 3,000-5,000 miles. These are not rules. We would advise against using these additives on new engines, as in that circumstances they can even help build carbon build up, which was scientifically proven in some research.

Our advice is to use fuel injector cleaners on older engines before an oil change, as well as engines that are often used in cold climate and driven on shorter distances or in congested stop and go traffic. In these situations, carbon builds up much faster and using a fuel injector cleaner will help in maintaining the optimal working conditions of your engine.

Using a higher quality gasoline or diesel fuel will also help against clogging up of the injectors and less carbon build up, so be sure that your car always gets the best one.


How will I know that my engine needs a fuel injector cleaner?


Engine with a lot of carbon build up and clogged injectors will start losing power, begin to consume more fuel, rattle at idle and have ignition problems. However, all those symptoms can be due to other parts of the engine, so be sure to always maintain your car routinely by regular oil, oil filter and air filter changes as well as spark plugs in the case of gasoline engines.


What can I expect after a fuel injector cleaner treatment?


You can expect several improvements on your engine after treating it with a fuel engine cleaner, but these results won’t happen immediately — you often have to drive a few hundred miles for it to work. Improvements include regaining power and enhanced throttle response, better fuel economy and fewer vibrations at idle. For best results though, it’s best that you check your spark plugs and air filter as well, as they can also help your engine run better.

What type of fuel injector cleaners are there?

There are several types of fuel injector cleaners out there. The basic ones will only clean the fuel system and the carbon build-up inside the combustion chamber. However, there are cleaners that will also stabilize the fuel or even boost the octane value to help the engine run smoothly even on lower quality gasoline. Some of them will even have lubricants that can help maintaining the fuel system of your car for longer periods of time. You can recognize all these products right away – they will either have “3 in 1” or even “5 in 1” description on the package. Read thoroughly on the benefits of every single one before buying.

AutoGuide.com
 

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First, you have to know how actually fuel injector works. Here is a complete guide that I found on the internet.

You can find many fuel injector cleaners.

But Here I found a detailed guide to choose the fuel injector cleaner. Hope it solves your problem. Here is the source
 

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Dodge Nitro 3.7L Fuel injector Replace Cylinder Misfire Tips


Dec 30, 2019

Dodge Nitro 3.7L Fuel Replace Cylinder Misfire Tips PART 2

 
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