Jeep J-4500 Car is getting worse gas mileage 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

(6,592)

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

(6,592)

Car is getting worse gas mileage Inspection Service

How much does a Car is getting worse gas mileage Inspection cost?

On average, the cost for a Jeep J-4500 Car is getting worse gas mileage Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1970 Jeep J-4500L6-3.8LService typeCar is getting worse gas mileage InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
1973 Jeep J-4500L6-4.2LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1971 Jeep J-4500L6-4.2LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1973 Jeep J-4500V8-5.9LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
1972 Jeep J-4500L6-4.2LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$105.02 - $112.55
1971 Jeep J-4500V8-5.0LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1971 Jeep J-4500V8-5.9LService typeCar is getting worse gas mileage InspectionEstimate$99.99Shop/Dealer Price$109.87 - $117.28
1972 Jeep J-4500V8-5.9LService typeCar is getting worse gas mileage InspectionEstimate$99.99Shop/Dealer Price$110.24 - $117.94
Show example Jeep J-4500 Car is getting worse gas mileage Inspection prices

Poor gas mileage, especially a sudden drop in fuel efficiency, can be blamed on a number of issues. It can also be an indicator of a much more serious issue that if left un-repaired, can develop into an expensive repair.

There are dozens of problems that can lead to a drop in gas mileage, some of them are serious and some can be easily corrected. Here are some of the more common issues that can affect the fuel efficiency of most cars.

How this system works:

The fuel system stores and supplies fuel to the car to help drive the engine. Fuel is mixed with air, atomized and vaporized in the engine intake system. It is then compressed in the engine cylinder and ignited which produces energy to move the pistons. There are different engine layouts and designs but most of them work in the same basic way.

When the system is working as designed, and under certain conditions, maximum fuel efficiency will be achieved. Numerous factors can have an affect on fuel efficiency so it is usually a constantly changing number but a serious and sudden drop in miles per gallon is cause for concern and the vehicle should be inspected.

Common reasons for this to happen:

  • Dirty Oxygen Sensor: An oxygen sensor measures exactly how rich or lean the exhaust gases are when they leave the combustion chamber. The data is used by the vehicle computer to adjust the amount of fuel entering the engine. If the sensor is dirty or failing it can lead to a drop in miles per gallon. It can also lead to failed emission tests and a rough idle.

  • Dirty Fuel Injectors: Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. Over time the fuel injector system can become clogged. This can lead to a drop in fuel efficiency as well as slow acceleration and the car not having enough power. If caught early, simply cleaning the injectors can solve the problem. As it progresses, the injectors may have to be replaced.

  • Bad or Dirty Spark Plugs: Spark plugs ignite the fuel in the combustion chamber. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. This can lead to a lack of power as well as a big decline in fuel efficiency.

  • Malfunctioning Mass Airflow Sensor: A mass airflow sensor detects the amount of air coming into the fuel injection system. It delivers that information to the vehicle's computer, which crunches the numbers and then delivers the proper amount of fuel to the air in the vehicle. A dirty airflow sensor will degrade fuel efficiently and lead to a rough idle and even stalling as the problem progresses.

  • Misaligned Tires: Tires that are low or out of alignment can lead to a drop in fuel efficiency. Checking the tire pressure and have the alignment checked on regular basis can help prevent this problem.

  • Defective Fuel Pump: Fuel delivery issues can drastically affect fuel efficiency. The fuel pump pulls fuel from the gas tank to the fuel injectors. The fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage. If this issue is not addressed it will lead to a rough, idle, sputtering and stalling.

  • Clogged Fuel Filter: A clogged fuel filter will also cause problems with gas mileage. The fuel filter screens out contaminants in the fuel, and over time it will become clogged. Fuel filters need to be replaced periodically.

  • Stuck Brake Caliper: A stuck caliper on a disc brake or a stuck shoe on a drum brake can lead to a serious decline in gas mileage. In addition, any brake issue can make the vehicle dangerous to drive. If the decline in efficiency is accompanied by the vehicle pulling to one side, the brake system should be inspected immediately.

What to expect:

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

How it's done:

A mechanic will inspect your fuel injectors, spark plugs, airflow sensor, tires and other important components to reach an accurate diagnosis. It may be necessary for the mechanic to test drive the car to produce acceptable results and pinpoint the source of the problem.

How important is this service?

A few of these issues are easy to fix but others are an indicator of a much more serious problem. Issues related to the fuel system will eventually lead to a rough running engine, stalling, and a car that won’t start at all.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Jeep mechanics

Real customer reviews from Jeep owners like you.

Excellent Rating

(6,592)

Rating Summary
6,251
185
36
24
96
6,251
185
36
24
96

Daniel

21 years of experience
346 reviews
Daniel
21 years of experience
Jeep Patriot L4-2.4L - Car is getting worse gas mileage - Baytown, Texas
Daniel was very professional and on time. He did an inspection on my Jeep and recommend things that needed done. I will be using him in the future. Thanks Daniel!

Justin

5 years of experience
52 reviews
Justin
5 years of experience
Jeep Wrangler L6-4.0L - Fan Clutch Replacement - Gilbert, Arizona
Justin was very prompt and got the job done quickly. Perfect!!!

Greg

22 years of experience
353 reviews
Greg
22 years of experience
Jeep Patriot L4-2.0L - Throttle Body - Tempe, Arizona
Awesome work, went above and beyond.

Joel

21 years of experience
987 reviews
Joel
21 years of experience
Jeep Wrangler L6-4.0L - Other Inspections - Ponte Vedra Beach, Florida
Prompt, friendly, knowledgeable. No complaints here.

Excellent Rating

(6,592)

Rating Summary
6,251
185
36
24
96
6,251
185
36
24
96
Number of Jeep services completed
72512+
services done by our mechanics
TOTAL NUMBER OF EXPERT Jeep MECHANICS
1300+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Honda Insight
The The 2012 Honda Insight is a dedicated hybrid five-door hatchback. Designed for those who want an environmentally conscious vehicle that also saves considerably at the pump, this hybrid also features a lower price tag, even for a fully equipped...
P0662 OBD-II Trouble Code: Intake Manifold Tuning Valve Control Circuit High Bank 1
P0662 means there is a voltage problem with the intake manifold tuning valve due to a faulty manifold or wiring issue.
5 Best Apps to Beat Traffic
For both iOS and Android, these 5 navigation apps will help you avoid traffic on your daily commute.

Rear differential won't spin driveshaft, starts to turn then locks up.

Hello there, many common faults will prevent your driveshaft from spinning on your 2003 Mazda. Without knowing which model you have I can only offer general advice. The most common fault would be failing u-joints or worn ring and pinion...

I need the torque specs for my motor mounts

Hi, thanks for writing in about your 2005 Nissan Altima. The front motor mounts on your Nissan Altima should be torqued to ~65-77ft lbs. As you know, this can be a bit of a tough job in some cases. In...

Bad idle with no check engine light on

Greetings, I'm sorry to hear about your sister. A rough idle may be caused by many different things such as low fuel pressure, low voltage to the fuel injectors, dirty fuel injectors, a vacuum leak, a faulty Oxygen sensor or...

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