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2017 Q60 3.0t Premium - Hard Starting and Long Cranks (P0087)

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Mike T. · rep 0 · May 22, 5:04 AM · 1 replies · solved · Question

Vehicle: 2017 Infiniti Q60 3.0t Premium

Hi everyone,

I'm reaching out about an issue with my 2017 Infiniti Q60 3.0t Premium, which has around 60,000 miles. For the past few weeks, I've noticed that the car takes a lot longer to start than it used to. I have to crank it for several seconds before the engine finally catches, and sometimes it feels like it's struggling to turn over.

Occasionally, after a hard start, the engine will even stall out shortly after, especially if I don't give it some gas. The check engine light came on, and when I scanned it, I got a P0087 code, which indicates 'Fuel Rail/System Pressure - Too Low'.

Could this be a failing fuel pump, or perhaps something else in the fuel system? Has anyone else with the VR30DDTT engine experienced this? What was the solution? Any advice on what to check first would be helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:04 AM

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ClearTheCode admin answer:

The P0087 code ('Fuel Rail/System Pressure - Too Low') on your 2017 Infiniti Q60 3.0t Premium, coupled with hard starting, long crank times, and occasional stalling, strongly points to an issue within the high-pressure fuel delivery system. The VR30DDTT engine uses both a low-pressure fuel pump in the tank and a high-pressure direct injection system.

Here are the most common causes and diagnostic steps:

  1. Failing High-Pressure Fuel Pump (HPFP): This is a very common culprit for P0087 on direct-injection engines. The HPFP is responsible for increasing fuel pressure to the very high levels required for direct injection. If it's weak or failing, it won't maintain adequate pressure.
  2. Failing Low-Pressure Fuel Pump: The in-tank fuel pump supplies fuel to the HPFP. If it's not delivering sufficient volume or pressure, the HPFP won't have enough fuel to pressurize, leading to low rail pressure.
  3. Fuel Pressure Sensor: A faulty fuel pressure sensor (either on the low-pressure or high-pressure side) could be sending incorrect readings to the ECU, causing it to mismanage fuel delivery. However, usually, a true low pressure condition is present with these symptoms.
  4. Fuel Injector Leakage: Leaking fuel injectors can cause a drop in fuel rail pressure, especially after the engine has been off for a while (known as 'bleed-down'), leading to long cranks as the system tries to re-pressurize.
  5. Fuel Filter Restriction: A severely clogged fuel filter (if applicable to your model's design) could restrict fuel flow, leading to low pressure.

When to see a shop: It is highly recommended to have your Q60 diagnosed by an Infiniti specialist. They have the necessary tools to monitor real-time fuel pressure readings (both low and high pressure) to pinpoint exactly where the pressure drop is occurring. Driving with insufficient fuel pressure can lead to lean conditions, which can cause engine misfires, reduced performance, and potentially damage to engine components over time. Prompt diagnosis and repair are crucial.

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