Lexus LX450 Car idle is rough Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(6)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(6)

Car idle is rough Inspection Service

How much does a Car idle is rough Inspection cost?

On average, the cost for a Lexus LX450 Car idle is rough Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1997 Lexus LX450L6-4.5LService typeCar idle is rough InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
1996 Lexus LX450L6-4.5LService typeCar idle is rough InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
Show example Lexus LX450 Car idle is rough Inspection prices

A rough idling engine can be caused by a number of issues, some of them are serious while others tend to be minor, but the symptoms remain pretty much the same. The car will feel rough and bouncy when the engine is running. The car will also idle below its regular speed, display inconsistent RPMs and may produce a shaking, skipping or slipping sound when the vehicle is running.

While a rough idling engine may seem to be a simple inconvenience it often indicates a deeper problem within the engine. The vehicle should be inspected and repaired as soon as possible because small problems have a way of turning into expensive repairs.

How this system works:

The idle speed of an engine is basically the rotational speed the engine runs on when it is un-coupled from the drivetrain and the throttle pedal is not being depressed. The idle speed is measured in the revolutions per minute of the crankshaft.

When an engine is running at idle speed it generates enough power to smoothly operate equipment such as the water pump, alternator, and power steering but not enough power to move the vehicle itself. A passenger car will usually idle between 600 RPMs and 1000 RPMs. A properly functioning idle should run smoothly without skipping or slipping.

Common reasons for this to happen:

  • Dirty Fuel Injectors: The fuel injection system injects fuel into the cylinders, which creates a mix of air, and fuel to ignite and burn. Fuel injectors have tiny nozzles to spray the fuel into the cylinder and they can become clogged over time.

A clogged or failing fuel injector creates a lack of fuel in the vehicle's engine. This can cause a rough idle, it can also cause symptoms such as slow acceleration or the car not feeling as if it has enough power. If the problem is addressed early, it is possible to clean the injectors, which will restore them to full function. If this condition is not addressed in a timely manner the injectors will need to be replaced.

  • Incorrect Idle Speed: While the average idle speed falls between 600 to 1,000 RPMs, if your vehicle is experiencing a rough idle it could be due to an incorrect idle speed setting. A trained mechanic can easily adjust the idle speed, and it should stay at the proper speed. If an adjusted idle speed becomes inconsistent or changes at random intervals there may be a bigger problem that needs to be explored.

  • Vacuum Leak: If the vacuum system has a leak, it can seriously affect the ability of the vehicle’s computer to regulate the air to fuel ratio. This can lead to a rough idle and if the problem is not addressed the car may experience slow acceleration and a lack of power. Vacuum leaks should be inspected and repaired immediately.

  • Incorrectly Installed or Damaged Plugs: Spark plugs are responsible for creating the spark that allows the vehicle to burn fuel. If spark plugs are improperly installed or malfunctioning, the idle speed can be affected. The vehicle's engine may vibrate or there may be slipping or straining sounds coming from the engine.

  • Defective or Clogged Fuel Pump: A rough idle can be related to fuel delivery issues. The fuel pump, which is responsible for pulling fuel from the gas tank to the fuel injectors, can become clogged or defective. If this happens the engine will not get enough fuel, which can cause a rough idle, sputtering, stalling and even slow acceleration.

  • Clogged Fuel Filter: A clogged fuel filter can cause similar problems. The job of the fuel filter is to screen out contaminants in the fuel, over time it will become clogged and need to be replaced. A rough idle is one symptom of a clogged fuel filter.

  • Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. If this is the case, the problem will usually get worse as RPMs increase. Common culprits include the ignition control module, plug wires, coils, and spark plugs.

  • Defective Airflow Sensor: A defective airflow sensor can be responsible for a rough idle. A mass airflow sensor detects the amount of air coming into the fuel injection system and sends that information to the vehicle's computer. The computer uses that data to deliver the proper amount of fuel to the air in the vehicle. Over time these sensors can malfunction or become dirty. One of the first symptoms of a malfunctioning airflow sensor is a rough idle. The car may also accelerate slowly and even stutter or stall as the problem progresses.

  • Dirty Oxygen Sensor: Oxygen sensors measure how rich or lean the gases are as they exit the combustion chamber. Depending on the results, the amount of fuel entering the engine is adjusted by the vehicle computer. The ultimate goal is to maintain an ideal mixture that produces the lowest emissions. A dirty or failing oxygen sensor will usually trigger the check engine light and can lead to a rough idle, lower fuel efficiency and failed emission test.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the rough idle issue, ​and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

The mechanic will check your car for leaks and defective parts. This includes airflow sensors, fuel pump, electronics and other important components related to your car's idling state. It may be necessary to crank the car and test drive it in order to verify the problem and provide an accurate diagnosis.

How important is this service?

A rough idling car is more of an inconvenience at first but if the problem is not solved it can quickly lead to bigger problems such as slow acceleration, stalling and eventually a vehicle that will not start at all. Most of these conditions can make the vehicle dangerous to drive. A rough idle should be inspected and repaired as quickly as possible.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Lexus mechanics

Real customer reviews from Lexus owners like you.

Excellent Rating

(6)

Rating Summary
5
1
0
0
0
5
1
0
0
0

Chris

22 years of experience
2239 reviews
Chris
22 years of experience
Lexus LX450 L6-4.5L - Power Steering Pump - Mission Viejo, California
Chris was prompt and professional. He provided a detailed description of the work completed and possible areas of maintenance I should be considering for my vehicle based on his inspection. I would not hesitate to contact him again for any service I might need for my vehicles in the future. It was a great experience.

Bernard

42 years of experience
40 reviews
Bernard
42 years of experience
Lexus LX450 L6-4.5L - Noise from engine or exhaust - Montebello, California
Outstanding mechanic.

Rodney

36 years of experience
545 reviews
Rodney
36 years of experience
Lexus LX450 L6-4.5L - Exhaust Gas Recirculation/EGR Valve - Lincoln, California
great

Kevin

33 years of experience
234 reviews
Kevin
33 years of experience
Lexus LX450 L6-4.5L - Brake Master Cylinder - Los Angeles, California

Excellent Rating

(6)

Rating Summary
5
1
0
0
0
5
1
0
0
0
Number of Lexus LX450 services completed
66+
services done by our mechanics
TOTAL NUMBER OF EXPERT Lexus MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Buy a Good Quality Thermostat
While While many people are familiar with the major parts in their vehicle, there are all kinds of smaller parts that play a vital role as well. The thermostat is one of those parts that many don't think about, but...
How to Replace a Lost or Stolen Car Title in Texas
It’s It’s never a great feeling to lose something of importance, or worse yet have it stolen. So what if that item is your car title? Your car title is what proves you are the owner of your vehicle, and...
How to Know When Your Transmission Is Not Working
Most vehicles use some sort of transmission to transfer the power generated from the engine, into usable power that can turn the wheels....

Car starts and stall with a Check Engine, EPC, and Power Control light coming on.

This issue may be related to a malfunctioning crankshaft or camshaft position sensor. These sensors monitor the position of both shafts and send feedback to the PCM (engine computer) which then sends signals to multiple other things such as fuel...

is there a difference in look from the right side to the left side CV axle

Yes, the transmission "end" of the left side axle is completely different from the transmission "end" on the right side. Consequently, the two axles are not interchangeable and that applies to both automatic and manual transmission versions of this vehicle....

I also have the 2012 Mercedes-Benz C250 Turbo charged m271 engine it rattles when I first started looking to replace the cam phase

You should first have the computer system tested so the noise can be completely diagnosed to find the cause of cold start rattling noise. You may just need to replace cam phaser or timing chain and guides with the phasers....

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com