Range Rover won’t start when it rains? Symptoms and fixes

As a mechanic and avid Range Rover owner, I can attest to the fact that these iconic vehicles can be quite finicky.

In fact, the mere mention of the phrase “Range Rover” can conjure up images of reliability issues and endless trips to the repair shop.

If you’re reading this article, it’s likely because you’re experiencing one of those issues yourself.

Specifically, your Range Rover won’t start in the rain. Fear not! In this article, I’ll guide you through what signs and symptoms to look for, possible OBD codes, common causes, and how to fix the issue yourself.

What models are affected?

Signs and symptoms

If you’re experiencing issues starting your Range Rover when it’s raining outside, you’re not alone.

Here are the most common signs and symptoms associated with this problem:

  • The engine cranks, but won’t start
  • Loud clicking noise coming from the engine compartment
  • Loss of power while driving in the rain
  • Check engine light is illuminated on the dashboard

List of possible OBD codes

When your Range Rover won’t start in the rain, there are several OBD (On-Board Diagnostics) codes that may be relevant. Here are a few to keep an eye out for:

  • P0300 – Random/Multiple Cylinder Misfire Detected
  • P0301 – Cylinder 1 Misfire Detected
  • P0302 – Cylinder 2 Misfire Detected
  • P0303 – Cylinder 3 Misfire Detected
  • P0304 – Cylinder 4 Misfire Detected
  • P0351 – Ignition Coil A Primary/Secondary Circuit Malfunction
  • P0352 – Ignition Coil B Primary/Secondary Circuit Malfunction

Common causes

Now that we’ve identified the signs and symptoms, let’s explore some of the most common reasons why your Range Rover won’t start in the rain:

  • Faulty Ignition Coils: The ignition coils in your Range Rover are responsible for creating the spark that ignites the fuel in your engine. If they’re not functioning properly, your engine may misfire or not start at all.
  • Cracked or Worn Spark Plugs: Spark plugs are responsible for igniting the air/fuel mixture in your engine. If they’re worn or damaged, they may not be able to create the necessary spark to start your engine.
  • Moisture in the Distributor Cap: The distributor cap distributes the electricity from the ignition coil to each spark plug. If moisture gets inside, it can disrupt the electrical signals and cause your engine to misfire or not start at all.
  • Blocked Air Filter: If your air filter is dirty or clogged, it can restrict the flow of air to your engine and cause it to run poorly or not start at all.
  • Faulty Fuel Pump: Your fuel pump is responsible for supplying fuel to your engine. If it’s not working properly, your engine may not get the fuel it needs to start.

Can it be fixed without a mechanic?

If you’re experiencing any of the issues we’ve outlined above, there are a few things you can try before taking your Range Rover to a mechanic:

  • Replace faulty ignition coils
  • Replace cracked or worn spark plugs
  • Dry out the distributor cap
  • Replace a blocked air filter
  • Test and replace a faulty fuel pump

Parts you’ll need to fix it

Depending on what’s causing your Range Rover to not start in the rain, you may need to purchase a few parts to fix the issue. Here are the most common parts you’ll need:

  • Ignition Coils
  • Spark Plugs
  • Distributor Cap
  • Air Filter
  • Fuel Pump

Tools you’ll need to fix it

In addition to the parts outlined above, you’ll also need a few tools to fix the issue. Here’s what you’ll need:

  • Wrench set
  • Socket set
  • Screwdrivers
  • Pliers
  • Spark plug socket

How to fix it

If you’re feeling confident enough to fix the issue yourself, here’s a step-by-step guide to get you started:

  1. Disconnect the battery: This will prevent any electrical shocks while you’re working on your vehicle.
  2. Locate the ignition coils: Depending on your Range Rover model, you may need to remove the engine cover to access the coils.
  3. Remove the old ignition coils: Using a socket or wrench, remove the bolts securing the ignition coils and gently remove them from the engine.
  4. Install the new ignition coils: Line up the new ignition coils with the holes in the engine and gently press them into place. Replace the bolts and tighten them with a wrench or socket.
  5. Replace the spark plugs: Using a spark plug socket and wrench, remove the old spark plugs and replace them with new ones.
  6. Dry out the distributor cap: Remove the distributor cap and dry out any moisture with a cloth or paper towel.
  7. Replace the air filter: Remove the air filter cover and replace the old air filter with a new one.
  8. Test the fuel pump: Use a fuel pressure gauge to test the fuel pump and replace it if necessary.
  9. Reconnect the battery: With all repairs completed, reconnect the battery and start your Range Rover.

Potential alternative causes

While the most common causes of a Range Rover not starting in the rain are outlined above, there may be a few additional causes to consider:

  • Clogged fuel injectors
  • Faulty camshaft position sensor
  • Blown fuses

FAQs

Why does my Range Rover only have trouble starting in the rain?

Moisture can cause electrical components to malfunction, including the ignition coils and spark plugs.

Can a blocked air filter cause my Range Rover to not start in the rain?

Yes, a blocked air filter can restrict the flow of air to your engine and cause it to not start.

Is it safe to replace faulty ignition coils myself?

While it’s possible to replace ignition coils yourself, it’s important to exercise caution to avoid electrical shocks.

 

Last updated and verified on 4th September 2023

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