2007 Dodge Nitro Engine Problems and Repair Descriptions at TrueDelta

Contents of the material


List of possible faults Diagnostics Elimination methods
The clearances in the valve drive are not adjusted Check clearances Adjust the gaps
Loose or broken valve springs Inspection during engine disassembly Repair the engine
The timing belt is worn out. Drive tension or support rollers are faulty Inspection Replace the belt. Replace the faulty tension or support rollers of the gas distribution mechanism drive
Wear of camshaft bearings and cams, crankshaft connecting rod and main bearings, pistons, piston pins, play or seizing in generator bearings, coolant pumps and power steering Examination Repair or replacement of parts
One or more power unit supports have lost their elasticity or have collapsed Inspection Replace the support
Low pressure in the oil line (at minimum crankshaft speed at idle, the pressure in the lubrication system of a warm engine must be at least 1.0 bar) Check the pressure in the lubrication system. You can measure the pressure by connecting a pressure gauge to the oil line by unscrewing the oil pressure sensor Troubleshoot the lubrication system
Worn oil pump drive chain Checking chain tension after removing the oil pan Replace the oil pump drive chain


There is another way to bring a Dodge engine to capital and take it to a scrap metal collection point. It is enough to forget about the gas distribution mechanism.

Bald timing belt

Is the car not moving? The bald belt is not to blame for this at all.

The toothed belt has become toothless

The saddest thing is that sometimes the owner spared no money on service, but he chose the wrong service. Once a Jeep Compass came to us, which had a fresh timing chain installed somewhere.

“New” timing chain Jeep Compass

You don’t need to be an expert to see links of different colors, some of which have a blue tint. Add to this the damage to the side edges and you will either get a used chain from disassembly, sold under the guise of a new one.

It is clearly visible that the chain is worn

However, some responsibility often lies with the owners themselves.

Broken catalyst Dodge Nitro 4.0

Filled up, drove away from the gas station and started seeing errors? What to do if the Check Engine light is on on the dashboard? At a minimum, stop, at a maximum, go to a service station on a tow truck.

The exhaust gases had nowhere to go

Thirty kilometers with hard misfires = new Dodge Nitro engine.

Only 30 kilometers after refueling

And this is not 3.7, which can be found on every corner, but a rather rare four liters.


List of possible faults Diagnostics Elimination methods
The air filter element is clogged Check the condition of the air filter replacement element Blow or replace the air filter element
Increased resistance to gas movement in the exhaust system Inspect the exhaust system for dented and damaged pipes, check the condition of the catalytic converter (back pressure) (service station) Replace damaged exhaust system components
Suction of foreign air into the intake tract Inspect the joints, check the fit of the throttle assembly, absolute pressure and air temperature sensors. Briefly disconnect the brake booster by plugging the intake manifold Replace gaskets, O-rings, parts with deformed flanges, faulty vacuum booster
Incomplete throttle opening Determined visually with the engine stopped Adjust the throttle valve actuator
Low compression in the engine cylinders (less than 11.0 bar): wear or damage to valves, their guides and seats, stuck or broken piston rings Check compression Replace faulty parts
Disturbed valve timing Check valve timing Establish the correct relative position of the shafts. Check compression
The gaps between the electrodes of the spark plugs do not correspond to the norm Check clearances By bending the side electrode, set the required gap or replace the spark plugs
Heavy carbon deposits on the spark plug electrodes; ingress of carbon particles into the gap between the electrodes Inspection Check and replace spark plugs if necessary
Damage to the insulation of high-voltage devices and circuits Using an ohmmeter, check for open or breakdown (short to ground) of the ignition coil windings and high-voltage wires Replace damaged ignition coil, high-voltage wires
There is not enough fuel in the tank By level indicator and fuel reserve indicator Add fuel
The fuel filter is clogged, the water that has entered the power system is frozen, the fuel pipes are deformed Check fuel system pressure Replace the fuel filter. In winter, place the car in a warm garage and blow out the fuel lines. Replace defective hoses and tubes
The fuel pump does not create the required pressure in the system Check the pressure in the fuel system, make sure the fuel module strainer is clean Clean the fuel module strainer. Faulty fuel pump, pressure regulator, replace
Poor contact in the fuel pump power supply circuit (including ground wires) Checked with an ohmmeter Clean contacts, crimp wire ends, replace faulty wires
Faulty injectors or their circuits Check the injector windings and their circuits with an ohmmeter (no open or short circuit) Replace faulty injectors, ensure contact in electrical circuits
The air temperature sensor or its circuits are faulty Check the sensor and its circuits Restore contact in electrical circuits, replace the faulty sensor
The ECU or its circuits are faulty To check the ECU, replace it with a known good one. Replace the faulty ECU
The clearances in the valve drive are not adjusted Check valve clearances Adjust the clearances in the valve drive
Severe wear on the camshaft cams Inspection during engine disassembly at a service station Replace the worn camshaft at a service station
Loose or broken valve springs Inspection during engine disassembly Have the engine repaired at a service station
The throttle position sensor or its circuit is faulty Check the throttle position sensor Restore contact in electrical circuits, replace the faulty sensor
Coolant temperature sensor faulty Check the sensor resistance at different temperatures with a tester Restore contact in electrical circuits, replace the faulty sensor

How to get rid of an injection problem on a Dodge Nitro?

To finish the content of our article on injection problems on Dodge Nitro , we will try to provide you with existing solutions to solve these problems. If, after an accurate diagnosis, it is your fuel pump that is causing your problems, unfortunately it will be very difficult to fix the problem without replacing the part, this change quite often involves replacing the injectors and sometimes the tank, this will take between 2000 and 3000 euros In general, try to get several diagnostics and estimates before starting any repairs. Regarding the injector problem, there are various solutions based on your problems, here they are:

  • Dirty injector: possible clean the injectors of your Dodge Nitro, feel free to refer to our content on this subject for information on the process. If it doesn’t work, you’ll have to change them.
  • Injector Leaking: Replacing and purchasing a connection kit will only cost you a few tens of euros, but you should still be able to replace it, do not hesitate to refer to our content on injectors that leak on Dodge Nitro so that you have all the solutions available.
  • HS Injector: Finally, as a last resort, your injector is damaged or no longer working, usually replacing an injector costs about 500 euros labor included.

For more Dodge Nitro tips, take a look at Dodge Nitro category.