ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

94-04 V6 Mustang Spark Plugs

Updated on November 6, 2010
Set of used spark plugs
Set of used spark plugs

Are you getting misfire codes? Engine running weak? Just have an afternoon to waste? These could all be good opportunities to replace your spark plugs. For all stock or bolt on Mustangs, it is recommended that you use Autolite or Motorcraft copper core spark plugs. These are what the car came with from the factory and have given the least problems over the years. Alternative brands include NGK, Zex, and Bosch however there have been a number of problems reported when using those plugs. They are, however, a good choice for a Mustang running forced induction (supercharger or tubro-charger) or nitrous oxide.

First let's start with the tools and supplies you'll need:

-Spark plugs

-Spark plug gap tool

-Spark plug socket (5/8")

-Ratchet (1/4" + 3/8") and assorted sockets + extensions

-Dielectric grease

-Anti-seize

-Torque wrench (that can read as low at 7 ft/lbs)


The first thing you're going to want to do is unhook your negative battery connector. I find any time you need to unplug sensors, it's safer to unhook the battery. With that unhooked you can begin removing your air intake tube. There are 2 latches to flip up on the air filter housing then 1 bolt holding the housing to the fender. If you follow the tubing a very short distance you'll find an electrical connector. Unplug this and continue following the tubing until you find a hose that leads to the crankcase. Remove this hose from the tubing but because as it may have started to dry-rot. Finally use your ratchet and appropriate socket to loose the hose clamp. At this time you can remove the entire air intake tube and set it aside (be gentle, the mass air sensor inside is delicate).

If you haven't already, use your spark plug gap tool to gap all 6 spark plugs to .054". I found a pair of sturdy needle nose pliers worked well for getting the gaps just right.

With all preparation now made, it's time to move on to the park plugs. I recommend starting on the passenger side as it is more difficult (save the easy for last). Follow the spark plug wires until you find the boot (the part that connects to the spark plug). Pull one off for now (this may required a little twisting as the boots can get stuck on there tight) or else you risk putting them back on in the wrong order.

Using your ratchet, an extension, and your 5/8" spark plug socket, remove the first spark plug. Take a look at the spark plug and determine if there are any visible problems. If there are then you should look further into the problem. If not, continue on.

Grab a new spark plug and apply a tab of anti-seize to your finger then brush it around the threads on the spark plug. This will make the spark plug easier to remove when you need to change them again.

Using your extension and spark plug socket, put the spark plug into the socket and line it up with the hole that the old one came out of. Tighten it down by hand then grab your torque wrench. Set your torque wrench to somewhere between 7 and 14 ft/lbs then finish tightening down the spark plug.

Get your dielectric great and put a dab into the spark plug wire boot. This will ensure a good connection as well as make the boot easier to remove in future spark plug changes. Put the boot onto the new spark plug. The boot may make a small "pop" feeling, letting you know it is securely in place. If that boot has been previously damaged it may not "pop" into place, but may still make a good connection.

There you have it, one down and 5 to go. Repeat the process for each of the 5 remaining spark plugs. You may have difficulty remove the 2 spark plugs closest to the firewall, but keep at at it because they will come out.

When you have all 6 spark plugs replaced and the spark plug wire boots securely reconnected you'll need to reinstall your air intake. Start with the tubing. Using the hose clamp, secure the tubing to the throttle body and reattach the hose from the crankcase as well as the electrical connector to the mass air sensor. You may want to take this opportunity to apply a small amount of dielectric grease to the electrical connector.

Now put the air filter and its housing back into place. Clamp it down to the tubing using the clamps connected to it and bolt the housing back to the fender. Reconnect your battery then start the car up. Watch for any check engine lights or odd sounds/sounds from the engine. If everything runs well go ahead and shut it down. Go clean yourself up and be proud of a good days work!

working

This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://corp.maven.io/privacy-policy

Show Details
Necessary
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
Features
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Marketing
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Statistics
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
ClickscoThis is a data management platform studying reader behavior (Privacy Policy)