Jeep J-3700 Engine idle speed is high 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

(6,567)

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

(6,567)

Engine idle speed is high Inspection Service

How much does a Engine idle speed is high Inspection cost?

On average, the cost for a Jeep J-3700 Engine idle speed is high Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1967 Jeep J-3700V8-5.3LService typeEngine idle speed is high InspectionEstimate$114.99Shop/Dealer Price$124.99 - $132.49
1965 Jeep J-3700L6-3.8LService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1970 Jeep J-3700L6-3.8LService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1969 Jeep J-3700V8-5.3LService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$104.99 - $112.48
1968 Jeep J-3700L6-3.8LService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$105.02 - $112.55
1966 Jeep J-3700V8-5.3LService typeEngine idle speed is high InspectionEstimate$94.99Shop/Dealer Price$105.01 - $112.52
1967 Jeep J-3700L6-3.8LService typeEngine idle speed is high InspectionEstimate$99.99Shop/Dealer Price$109.87 - $117.28
1965 Jeep J-3700V8-5.3LService typeEngine idle speed is high InspectionEstimate$99.99Shop/Dealer Price$110.24 - $117.94
Show example Jeep J-3700 Engine idle speed is high Inspection prices

What is engine idle speed and how is it maintained?

Engine idle speed is the speed, measured in revolutions per minute (RPM) an engine is designed to run at when the engine is fully warmed up and the vehicle is stopped in park or neutral. Typically, the idle speed will be set at a value in the range of 600 to 800 RPM, but the exact value will depend on the number of engine cylinders and whether the vehicle is equipped with a manual or automatic transmission. Idle speed is maintained by the throttle body working in conjunction with the vehicle’s powertrain control module.

When to check for idle speed issues:

  • RPM on dash gauge does not match OEM specification. Many cars have RPM gauges. If the engine speed displayed on the gauge does not match the original equipment manufacturer (OEM) specification on the underhood label, there is probably something wrong.
  • Engine is idling higher than normal. If there is no RPM gauge but the engine sounds like it is turning faster when idle, a mechanic can use an instrument to measure the actual engine speed.
  • Harsh engagement in drive. If the idle speed is too high, the vehicle will jump forward when placed in drive.
  • Excessive brake effort is required to hold vehicle at a stop. If idle speed is normal, only a very light force on the brake pedal will be necessary to prevent forward motion in drive.

How do mechanics adjust or repair incorrect idle speed?

The repair procedure depends on the exact cause of the high idle. The below lists common causes of high idle and in each case, the appropriate vehicle system, components, and parts involved would be inspected, removed for repairs, and/or replaced as needed.

Faulty Fuse: In the majority of vehicles, engine idle speed is controlled via an idle control valve (ICV). A faulty or blown fuse in other electronically controlled systems can cause the Idle Air Control (IAC) motor to malfunction, leading to a higher than normal engine idle speed.

Faulty Idle Air Control Valve (ICV): Some cars are equipped with an idle air control valve to maintain idle speed. This part can malfunction due to excessive carbon buildup in the intake manifold.

Vacuum Leak: On any engine, a vacuum leak will cause a high engine idle as the oxygen sensor detects lean operation and the engine computer then tries to compensate, which can result in abnormal idle. Malfunctioning Throttle: A malfunctioning throttle system can cause both a high or low idle as well as an engine stall. A dirty air intake or cracked air intake tube is often the culprit. Computer Malfunction: If the powertrain control module is malfunctioning, idle speed may be affected.

Is it safe to drive with incorrect idle speed?

No. High idle speed could make your vehicle difficult to control and were the idle speed to suddenly and unexpectedly increase to really high levels, you could experience unintended acceleration. Even moderately high idle speed, that is up to 1,200 RPM will make it more difficult to slow your vehicle when stopping and, once stopped, there remains the risk of your foot coming off the brake and the car jumping ahead. High idle speed also wastes gas and can be distracting as the vehicle does not perform as expected.

When addressing idle speed issues, keep in mind:

  • Related functions, such as the idle up function when the air conditioner is turned on, will be inspected by a mechanic during the repair of a high idle problem.
  • Prior to replacing parts, such as the throttle body, the mechanic will also need to rule out electrical causes of incorrect idle speed as well as physical causes such as vacuum leaks.

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

(6,567)

Rating Summary
6,227
185
36
24
95
6,227
185
36
24
95

Mike

13 years of experience
176 reviews
Mike
13 years of experience
Jeep Wrangler L6-4.2L - Engine idle speed is high - Rolesville, North Carolina
Second time using Mike, pleased both times.

Rodney

36 years of experience
542 reviews
Rodney
36 years of experience
Jeep Grand Cherokee V8-4.7L - Engine idle speed is high - Elk Grove, California
Very professional and friendly. Explain to you what the problem and what he did.

Mathew

24 years of experience
93 reviews
Mathew
24 years of experience
Jeep Wrangler L4-2.5L - Engine idle speed is high - Jacksonville, Florida
Matthew arrived at the appointed time. He was friendly, knowledgeable and helpful. He clearly was interested in identifying the exact mechanical issue I was experiencing, which he found. In addition, he identified another issue which would probably be the cause of another mechanical in the near future.

David

11 years of experience
225 reviews
David
11 years of experience
Jeep Grand Cherokee V6-3.6L - Brake Pads Replacement (Front, Rear) - Kansas City, Kansas
Great service. Prompt, friendly, and efficient. Will absolutely use David for future needs.

Excellent Rating

(6,567)

Rating Summary
6,227
185
36
24
95
6,227
185
36
24
95
Number of Jeep services completed
72237+
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 Dodge Charger
If If you’ve always loved driving performance cars but you don't know how you’ll fit a baby seat in a Mustang or a Camaro, the 2012 Dodge Charger could be the car for you. While it has the room and...
How to Get a Louisiana Driver's Permit
The The Louisiana Office of Motor Vehicles requires all teen drivers to participate in a graduated driver's licensing program. The first step in this program is to obtain a learner’s permit, which graduates to a full license as the driver...
How to Install a Car Alarm
Whether you just bought a used vehicle without an alarm or just decided to opt for the extra security, installing an alarm system into your car is never a bad idea. There are a number of practical benefits, and in...

Dealer found error codes C1231 and C1201. Does my car have a faulty steering angle sensor and need a new charcoal canister?

Hello. Go back and speak with your Toyota dealer. There is a Technical Service Bulletin (358305) that addresses the two problem codes and scenario you describe. The dealer will update the software for the ABS system to correct this problem....

Misfire after installing AC

Hello. In most cases the AC system should not affect the operation of the engine. If the issues only began after the AC was installed, it may be possible that the issue developed while the AC was being worked on....

'05 subaru forester automatic jolts when shifting to 2nd gear

Many newer automatic transmissions have temperature-sensors in them that, on a stone-cold start, restrict normal shift to only the lower (or non-overdrive gears) until the engine coolant and transmission fluid reach a certain level which in many engines, is around...

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