Buy Now | Log In | ALLDATA Corporate Site | AutoZone.com
Back To Home Page
Log In To Your Subscription
Go To ALLDATA Back Home
Buy A Subscription! Back Home About ALLDATA Information View Sample Vehicles Read Testimonials View Factory Service Bulletins and Recall Titles Contact Us
Dowload Our Navigation Chart
February 2015: New vehicles added including 2014 GM.
• View New Vehicles
October 2014: Release of 2013 along with initial 2014 Vehicles
• View Vehicles
View All News and Updates:
• Go To News
Tech Tips
  Read All Tech Tips

ALLDATA Tech Articles Are Updated Weekly
• View All Tech Articles

  Dodge Durango: Brake Pulsation Problems In Paul's Durango
• Read Dodge Article
 
Fixing A Smelly Audi Audi Tech Tip: A4 begins to Smell caused by a Faulty Hose Composition
• Read Audi Article
Why Do You Need To Change Your Timing Belt? Why Replace Your Timing Belt
• Read Belt Article
Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
Home >> Featured Tech Articles >> Go Back
   
  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

Miscellaneous
Acura
Audi
Buick
Cadillac
Chevy
Chrysler

Dodge/Plymouth
Ford
GMC
Geo
Hyundai
Honda
Isuzu

Jeep
Lexus
Lincoln - Mercury
Mazda
Mercedes
Mitsubishi
Nissan
Oldsmobile
Pontiac
Saturn
Subaru
Toyota
Volkswagen
 
   
  Jim Grant's Tech Tips

‘98 Chevy Blazer, Wild Temperature Gauge

Q: My ‘98 Chevy Blazer’s temperature gauge got pretty high, all of a sudden. Then the temperature gauge dropped all the way down. Then the service engine soon light came on and the engine ran funny but the temperature gauge went up again. Also, at stop lights or other stops the temperature would rise and go into the red easily. But, when the RPMs went up the temperature would drop again? What is wrong?

- Matthew

A: I can’t tell you what is wrong, but there are some checks you should perform. First, be sure the coolant is at the correct level. Don't just look at the level indicated on the coolant recovery tank. With the engine cool remove the radiator cap and check the level. A system problem can leave the coolant recovery tank level looking great, while the radiator is low. If the cooling system is at the correct level then you need to get into the vehicle’s computer to see what is happening. The coolant temperature sensor for the computer is also used for the temperature display on the dash. If the coolant temperature sensor is failing, it will cause rapid gauge fluctuation and cause the service engine soon light to be turned on. By monitoring the coolant temperature sensor movement and comparing it to the coolant temperature at the radiator you can determine if the sensor is providing a true reading of engine coolant temperature.

 
     
Have any Questions About ALLDATAdiy.com? Please Email Us
Buy Now | Log In | About | Sample Vehicles | Testimonials | Join Affiliate Program