AskPatty Certified Female Friendly Logo
What causes my truck to idle up and down when I start it ?

Answers from the Automotive Experts

Amanda J. Pierce, MBA Rosie, If you have a check engine light you may want to see what the hard code is setting, which can be checked by a technician with a scan tool. If there is no check engine light it could be a number of things such as, idle air control valve, throttle position sensor, or a few others. I would have it scanned and inspected by a professional.

Audra Fordin, Owner at Great Bear Auto Shop Hi Rosie, There are many "things" on your car that can make the idle fluctuate up and down. Does your truck feel like it wants to stall? Is the engine light on? Take notes of what is going on when you start the truck. Vacuum and sensors are what pops into my mind first. If the engine light is on, that will help to determine the cause, and help to find a cure. Check out the list of female friendly repair shops on the site. They can help you for sure. Thanks for writing in, Audra

Contribute to this question:

blog comments powered by Disqus

Related Ford Ranger FAQs

  • I’m replacing a 97 Ford Ranger Steering Column with a 95 column. It won’t start and ... Read More
  • Malfunction Indicator Lamp Results: ON Diagnostic Trouble Code: PO133, O2-Sensor ... Read More
  • What would be involved with getting a gas gauge fixed, and what would the approximate ... Read More
  • i need to know why my 85 ford ranger grinds when i try to start it? Read More

Need Car Advice?

Ask The Experts!

Looking for a New or Used Car?

Search for our Certified Female Friendly® Car Buying Marketplace locations

Help Our Charities