Honda NSX Won’t Start? Here’s Quick Solutions to the Most Common Causes

Intro

As a professional auto mechanic with over 20 years of experience, I’ve seen my fair share of Honda NSXs that refuse to start. And believe me, I understand how annoying it can be when you’ve got places to go, you hop in, turn the key, and … drum roll please … absolutely nothing!

But no need for concern, you’ve come to the right place. My name’s Robby and in this article, I’m going to explain the most common causes why your Honda NSX won’t start. I’ll discuss all the most common causes and you’ll understand how to diagnose each potential cause, as well as what to do in each case. I’ll offer practical troubleshooting pointers and repair solutions based on my 20 years’ of practical experience, so you can get your Honda NSX starting and moving as quickly as possible.

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They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

Quick Solution Alert! 🚗💡

To save you time, this might be the quick solution you need.

An online mechanic can help you solve the issue much faster, and save money doing it.

They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

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Understanding Why a Honda Won’t Start

Honda Wont Start
Image Credit: MechanicAnswer.com

When you realize to yourself “My Honda NSX won’t start”, this could be due to different issues being wrong with your car. Maybe it’s a case where the engine is not cranking at all, possibly it is turning over partially but then not starting, or perhaps you can hear a clicking sound when you attempt to start the engine, but in the end absolutely nothing happens. Each of these situations can be indicative of different issues with your car.

Common Reasons Why Your Honda NSX Won’t Start

There are various contributing reasons why an NSX won’t start. These concerns usually consist of a weak or dead vehicle battery, a bad alternator, starter motor issues, fuel system complications, in addition to electrical or circuitry problems. Each one of these issues can manifest as different symptoms and require different solutions to identify and fix, so we can get your car back on the road ASAP.

Symptoms of Honda NSX That Won’t Start

Having the ability to recognize and diagnose these signs, will help you in discovering the underlying cause of the problem. For example, when you turn the key in the ignition, and you hear a clicking noise however your Honda still refuses to start, it is often an indication that there is an issue with the fuel or ignition system.

Analysis of The Reasons Why Your Honda NSX Won’t Start

The very first step to discovering a solution to the issue is having a grasp of the root cause of that issue, so let’s delve into the most typical factors why your NSX won’t start.

Honda NSX Battery Issues

car wont start but battery is good
Image Credit: MechanicAnswer.com

In most cases, the most common reason why your Honda NSX will not start is, in many cases because of the battery, it’s either weak or dead, and you have to charge up the battery or change it. The vehicle’s battery supplies the electric that’s needed to start the engine, and power all the electrical components in your Honda NSX. Signs of a bad battery problem in a NSX, are things like the vehicle being sluggish to crank the engine, dim or weak headlights, or a lit-up battery caution light on your car’s dash. A portable jump starter allows you to jump start your car’s if the battery is dead without needing another vehicle. And a battery charger can help recharge a dead battery and diagnose battery issues.

Honda NSX Alternator Problems

Faulty Alternator means car wont start

The alternator is tasked with charging the battery from the engine while the car is running. A damaged alternator can easily stop your Honda NSX from starting as it will not be able to charge the battery, from the engine, so it will drain fairly quickly until it’s completely drained and you don’t realize it until you can’t get your Honda to fire up. Signs that your NSXs alternator is faulty can be a lit-up battery or alternator caution light on the dashboard, dim headlights when the engine is idling, and also a whining or grinding noise from the engine while it’s running.

Honda NSX Starter Motor Failures

my car wont start is the starter motor?

When you start your Honda NSX, the starter motor deals with turning the engine over (cranking it). If the starter motor is damaged in some manner then the engine won’t crank, and your NSX won’t start. You can find out if your starter motor has a problem or not often by listening, if you hear a clicking noise when you turn the key or a grinding sound throughout the startup, or your car can start, but only intermittently then the starter motor may very well be the problem.

Honda NSX Fuel System Complications

Replacing the Fuel Filter of a Honda

Now we’re not talking about when you simply run out of gas here, but your vehicle’s fuel system itself having problems. Your Honda NSX uses a combustion engine, and because of this to start and run, it requires a combination of both fuel and air. If your NSX issues are part of a faulty fuel system, this might be a clogged fuel filter or a broken fuel pump relay, which could indicate the engine may not be getting the fuel it needs to get the vehicle going. Over time fuel injectors can also get clogged, so using a fuel injector cleaner like Red Line can help clean them and improve starting.

Honda NSX Electrical System or Wiring Problems

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes this image is a joke, but all the same, today’s modern Honda NSXs rely heavily on electronic components, which can mean there are lots of things that can potentially break. Even in an older vehicle, you can still have fairly normal problems such as blown fuses, spark plug problems, a broken ignition switch, or a damaged sensor, and more. These can be a few of the many electrical explanations as to why your Honda NSX will not start. Indications of a wiring or electrical issue can vary vastly but can typically include the engine not cranking, or your NSX can start however only intermittently or various alert lights show on the dash. To appropriately diagnose and fix these kinds of issues, you will need the skills of a skilled Honda mechanic in your area or online.

Solutions & Repair Tips

Once you have found out what the cause of your vehicle being unable to start is. The next step is naturally to try and fix it. Here are some suggestions for the common issues we’ve covered up until now.

How to Troubleshoot and Fix Battery Issues in a Honda NSX

my car wont start i think its the battery

If it’s a battery issue you suspect is the cause of your troubles, then the first thing you must do is examine around the battery and check the battery terminals. You want them to be clean, not corroded, and tightly connected. If you find that the terminals are corroded you can attempt cleaning them with a mix of baking soda and water.

Once you have checked the battery terminals, you can check to see if the battery is just out of charge, or worse, it’s old and weak, or dead and needs to be replaced. For this, you can charge the battery in a few different ways:

Robby Recommends:

Portable Car Battery Jump Starter Charger - NOCO Boost Plus GB40

At Home Battery Charger - YONHAN - Fully Automatic

Jumper Cables by Energizer for Car Battery - Heavy Duty

NOCO Boost Plus GB40 1000A UltraSafe Car Battery Jump Starter

YONHAN Battery Charger Fully-Automatic

Energizer Jumper Cables for Car Battery, Heavy Duty

If the battery charges up and works fine, great, problem solved! However, if the battery is old or weak, you will have to replace it. Otherwise, even if you charge it up enough to start the Honda NSX, it will likely deplete quickly again in the not so distant future. You can use a multimeter or OB2 scanner as a way to test the life of the battery to find out if it’s worth saving or if it needs to be changed for a new one. You can get a replacement car battery for your exact Honda model by visiting Amazon here, and selecting “enter a new vehicle” to filter the results for your Honda NSX, and choose a suitable one, from a seller with great reviews.

If charging your NSX’s battery does not resolve your issues, and problems like frequent draining and needing frequent charges persist even after replacing the battery, there is likely a more complex underlying issue causing excessive battery drain. In that case, you will need a professional mechanic to inspect and diagnose the root cause. You can also ask the advice of a mechanic online through us, or get an instant free quote on a Mobile car repairs.

How to Diagnose Alternator Problems in a Honda NSX

Funny Image of a DIY mechanic replacing an alternator
Funny Image of a man  trying to replace an alternator

Ok, so the image above I found online and is a joke, DON’T DO THIS. I’ll explain in more detail, but in short, to diagnose and fix alternator problems you will need the help of a qualified and experienced auto mechanic. If you’re thinking that the alternator is the cause of your car starting troubles, you can test it to see for yourself. If you can get the vehicle to start up temporarily (you may need to jump-start the vehicle for that), but once it’s going, let the vehicle run, and while it’s running, disconnect the positive terminal of the battery. It’s likely due to a problem with the alternator if you find your Honda NSX dies pretty quickly when you disconnect the positive terminal. However, be warned this test can be risky and dangerous if you don’t know what you’re doing, and may harm the sensitive electronic elements in your car, so in this case best to consult with a professional mechanic local to you or online, prior to ever trying this. If you think it might be the alternator, it’s best to ask a mechanic online or near you.

How to Identify and Solve Starter Motor Failures in a Honda NSX Honda Starter Motor Replacement by a qualified mechanic

Listen for a clicking noise when you turn the ignition key if you think the starter motor is the cause of your Honda NSX not starting. In this case, the solution is to have the starter motor changed for a new one by a professional mechanic.

How to Fix Fuel System Problems in a Honda NSX

my car wont start but clicks

If you think the issue to be because of a fuel system problem, try and listen for the fuel pump when you turn the key to the “on” position, before starting the vehicle. You ought to hear a humming noise for a couple of seconds. It may be there is a problem with the fuel pump if you are not able to hear this sound. If you notice your Honda is tough to start, it stalls, or it has poor acceleration, it could be due to a clogged fuel filter. Both of these will likely need a professional auto mechanic in order to properly fix. This is because may require a fuel pressure test kit and mechanic’s tool set to fully diagnose and repair fuel system problems.

How to Fix Electrical or Wiring Problems in a Honda NSX

fuses to check when car wont start

If you think it’s a wiring or electrical system issue, first examine the fuses associated with the ignition system, and replace any that have actually blown. If your NSX starts after this, then it was a successful, cheap and simple repair! If the vehicle doesn’t start, even intermittently, it could be a sign of a problem with the ignition switch itself. If various warning lights are visible on your dashboard, it could be a problematic sensor. These issues can be very complicated and a reliable Honda mechanic is likely required to diagnose and fix it. 

Preventive Steps

As my dad always stated “Prevention is better than cure”, so here are some preventative measures to make sure you can avoid any Honda NSX starting troubles ever again!

Regular Maintenance of Your Honda NSX:

Father teaching his son how to check the oil on a Honda

Regular maintenance of your Honda NSX is essential to avoid future troubles. This includes things like routine oil changes, inspecting your vehicle’s battery, cleaning the terminals, changing the fuel filter as recommended/required, and having your car checked by a reliable auto mechanic routinely. You can consult a mechanic in your area or online if you find yourself uncertain or confused about the regular upkeep jobs needed for your particular vehicle.

Drive Your Honda NSX Frequently:

happy black couple driving their Honda after getting it started again

If you happen to leave your Honda NSX off for extended periods of time without taking it for a spin now and again, the battery can drain as it’s not being charged up by the engine running regularly. Try to drive your NSX regularly to keep the battery charged. If you remember you haven’t driven your car in a while, take it for a spin to make sure there is still a charge in the battery. Worth noting: letting the battery totally drain, is also damaging to the longevity of the battery, try not to do this.

Pay Attention to Warning Signs:

Honda warning dash lights

If you observe anything strange like uncommon noises, changes in driving and performance, or alert lights showing on the dash, don’t ignore them and get on with your day. These are usually early warning signs of an issue and it’s best to be resolved ASAP before they end up being bigger issues later. Talk to a mechanic in your area or online about these problems and get advice on if they need to be attended to.

When to Ask a Honda Mechanic Online

If you want to save time, would like a specialist Honda mechanic on hand to guide and to advise you, or you’ve tried to resolve it yourself, however in spite of your best efforts your Honda will not start, then chatting with a Honda mechanic online can be a great choice. It certainly beats googling things like “Honda starts but wont stay on” all day and still getting nowhere.

Advantages of an Online Honda Mechanic

When to ask a mechanic online

Online mechanic services provides a number of benefits. You can get professional Honda mechanic recommendations 24×7 and without leaving your home, which is particularly useful if your car will not start and is stuck in the driveway. It can also help you save money as online mechanic consultations are more affordable than a physical visit to a local mechanic near you. Plus, you can get the answer rapidly, which is terrific if you’re in a rush, require a 2nd opinion, or you simply like having an expert Honda mechanic on hand.

How Services Like MechanicAnswer.com Can Help You

Honda Wont start help online
(Image Credit: MechanicAnswer.com)

Our Honda online mechanic ask service connects you with accredited professional mechanics who can provide instant help, guidance and advice with all issues and all Honda models. It doesn’t matter if your NSX is having trouble or your Honda N360 won’t start, we’ve got the Honda mechanics online that with a little bit of information over a chat box, can solve anything for you.

You’re able to describe the issues you are having with your vehicle, ask Honda mechanics unlimited questions, and even upload photos and videos so you can actually show the mechanic what you mean. You can talk with them through online chat or by call, whichever you prefer. The Honda mechanic will help you detect the issue, advise you on what are the best options for your individual circumstance and even guide you through easy maintenance and repairs step by step.

Conclusion

To wrap up, when your Honda NSX wont start, it will likely be a major disappointment and a massive hassle. However, having a firm grasp of what may be triggering the problems, having the ability to troubleshoot them, and knowing what actions are required in each case, when and where to get help if needed, will be a huge benefit. Bear in mind that routine upkeep is essential for preventing all kinds of car issues.

I hope this guide helps you get your Honda started again, and have a great day!

Frequently Asked Questions When a Honda NSX Won’t Start (FAQs)

Honda NSX won’t start but lights turn on?

If your Honda NSX’s lights turn on but it still won’t start, the issue may not be related to the battery. More than likely there is a problem with the starter motor. Investigate if you hear any clicking noises when attempting to crank the key. If so, the starter motor is trying to engage but failing. Have a mechanic check over the starter motor – it may need to be fixed or swapped out.

Honda NSX won’t start but has power?

When your Honda NSX has power (lights, radio etc work) but does not start up, there may be a fuel delivery problem. Issues like a faulty fuel pump relay could prevent fuel getting to the engine. Without enough fuel, combustion can’t happen and the engine won’t start. Check around the back seat when cranking the key – you should hear the fuel pump prime for a few seconds. If not, have a mechanic check the fuel system.

Honda NSX won’t start but battery is good?

If your Honda NSX’s battery checks out OK and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Possible issues include a bad ignition switch, broken sensor, or wiring problems. As electrical issues can be tricky, diagnosis by a professional mechanic is best. They can accurately identify the specific electrical fault and have it repaired.

Honda NSX won’t start just clicking?

When you turn the key and there’s only a clicking noise but the engine doesn’t crank, the most common cause is a faulty starter motor. The click comes from the starter solenoid attempting to activate the starter motor, but the motor itself fails to crank the engine. As the starter motor needs mechanical repair or replacing, seek help from a reliable mechanic to get your Honda NSX running again.

What should I do if my Honda NSX won’t start?

First off, don’t panic. Attempt to identify any signs that might suggest an issue, such as unusual sounds, warning lights on the dash, or changes in performance. The cause of the issue is likely one of the main causes gone over in this guide. If you can’t find the problem yourself, you will require the assistance of a Honda mechanic in your area or online.

How to tell if my Honda NSX won’t start because of the battery?

Signs of a battery issue in a NSX consist of the engine being slow to crank, dim headlights, and lit battery warning lights on the dash. You can also check the battery terminals to see if they are clean, not corroded, and securely connected. If the battery is old or weak, it might be best to just replace it.

How can I prevent my Honda NSX not starting issues?

In order to make sure this annoyance never happens once again, regular maintenance is essential. This consists of things like oil changes, checking the battery and cleaning its terminals, changing the fuel filter as recommended/required, and having your Honda NSX inspected by a mechanic regularly. It’s also an excellent idea to drive the car frequently so the battery stays charged.

Can I ask a mechanic online if my Honda NSX will not start?

Yes, you can. An online mechanic service like ours can provide instantaneous specialist Honda mechanic assistance and suggestions, without you needing to leave your house. This is particularly beneficial if your car won’t start and is stuck in the driveway.

How can services like MechanicAnswer.com help if my Honda NSX can’t start?

We connect you with licensed professional Honda mechanics who can supply suggestions on your particular circumstance. You can tell them about your car problems, ask unlimited questions, and even upload images and videos so you can appropriately demonstrate the issue and describe it fully. The mechanic will have the ability to help, troubleshoot, identify the problem, suggest the best course of action and guide you along the way.

Random Interesting Facts About the Honda NSX

Did you know that the Honda NSX was the first mass-produced car to feature an all-aluminum body? That’s right, this sleek and stylish sports car was ahead of its time in terms of design and technology. And get this – the NSX was also the first production car to feature titanium connecting rods, which are typically only found in high-performance race cars. It’s no wonder this car has such a cult following among car enthusiasts. And if that’s not enough to impress you, the NSX was also the first car to feature an electric power steering system, making it a pioneer in the world of automotive innovation. No wonder you’re feeling a little perplexed about getting it started – this car is truly one of a kind!

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Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

Where Can I Find My VIN?

Your vehicle’s unique Vehicle Identification Number (VIN) can be found on the title document, the vehicle registration, and the insurance policy. It is a series letters and numbers like this as example: WAUGC0896JA235262. The VIN can also be located on the following locations on the vehicle itself:

how to find VIN on vehicle