Hello I’m a Proud Owner of a 2013 Nissan Altima Coupe 2

Nissan’s decision to discontinue the Altima Coupe after the 2013 model year was primarily influenced by sluggish sales. This move was part of Nissan’s strategic shift to focus exclusively on the sedan model for the Altima, discontinuing both the hybrid and coupe variants. Despite the discontinuation, the 2013 model year marked a significant milestone for the Altima, introducing the Advanced Drive-Assist Display.

The 2013 Nissan Altima: Refined and Fuel-Efficient

In its fifth generation, the 2013 Nissan Altima stands out as the most refined, fuel-efficient, and upscale iteration of the Altima. With sharp handling, a well-crafted cabin, and lively engines, the 2013 Altima boasts more character than the typical family sedan.

A Closer Look at the Engine

The 2023 Nissan Altima, continuing the legacy, features a standard 2.5L four-cylinder engine. Delivering an impressive 188 horsepower and 180 pound-feet of torque, this engine ensures ample power for everyday driving. The Altima’s evolution over the years highlights Nissan’s commitment to enhancing both performance and fuel efficiency.

Engine Issues: A Troubling Experience with the ’08 Altima 3.5 SE Coupe

A proud owner of an ’08 Altima 3.5 SE Coupe faced unexpected challenges after attempting a spark plug change at 105k miles. Despite being an IT professional with limited automotive expertise, the owner ventured into this DIY task following the Schedule B maintenance list.

Spark Plug Change Dilemma

The spark plug replacement, documented on importnut.net, utilized Autolite XP 5684 plugs, considered compatible with the engine. However, the owner deviated from the instructions by not replacing the intake manifold gasket, avoiding anti-seize, and neglecting some vacuum hose replacements.

Unforeseen Consequences

Post the spark plug change, the engine initially idled smoothly, but issues emerged gradually. Shuddering sensations during driving, especially at speeds between 70-80 mph, raised concerns. Despite revisiting the spark plug change and replacing the manifold gasket, the problem persisted.

Seeking Solutions

The owner explored various possibilities, considering issues with spark plug boots, wiring, and even the fuel filter. However, the perplexing aspect was the sudden appearance of symptoms post-spark plug change. While acknowledging a slight hissing sound from the manifold, efforts to identify the root cause continued.

User Recommendations and Considerations

Faced with uncertainty, the owner sought suggestions from the community but emphasized a desire for practical feedback based on personal experiences. The choice of Autolite XP 5684 plugs raised questions about compatibility, leading to contemplation of reverting to the original Denso plugs.

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