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mikaflamme7

Lafesta High Fuel Consumption Rough Idle

I'm having a headache with my 2013 Nissan Lafesta, gasoline engine. It's got 135335 km on the clock and lately, the fuel consumption has shot up, and it's been a pain to start, especially when cold. I'm suspecting a defective throttle valve. I've cleaned the air intake and throttle body hoping for a quick fix, but no luck. Could it be a defective accelerator pedal module causing this? Any thoughts?

Summary of the thread

A 2013 Nissan Lafesta experienced increased fuel consumption and difficulty starting, particularly when cold. Initial suspicions pointed to a defective throttle valve, but cleaning the air intake and throttle body did not resolve the issue. Further investigation suggested a faulty accelerator pedal module, which was confirmed by a mechanic and replaced, resolving the problem.

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4 comment(s)

alfredeule4

Hmm, sounds familiar. I had similar issues with my old Opel Astra, though it was a diesel. Higher fuel consumption and poor starting were the main symptoms. Did you check for any unusual engine idle or throttle response?

mikaflamme7 (community.author)

Thanks for the input! Engine idle seems a bit rough, and there's a slight delay in throttle response. What was the cause in your case with the Astra, and what did you end up doing to fix it?

alfredeule4

Turns out, the Astra had a faulty throttle position sensor. I tried cleaning everything first, like you, but it didn't solve it. Eventually, I had to take it to a workshop. They diagnosed it pretty quickly.

mikaflamme7 (community.author)

Appreciate the info! Based on your experience and some further digging, I took the Lafesta to a mechanic. They confirmed it was the accelerator pedal module. Got it replaced for 205€. Seems to have solved the problem! Thanks again!

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NISSAN

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LAFESTA