Buy Now | Log In | ALLDATA Corporate Site |
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 users over the course of many years.
If you have any questions, please feel free to email us.



Lincoln - Mercury
  Jim Grant's Tech Tips

'94 Oldsmobile Cutlass, Only Runs When Cold

Q: I have a big problem with my ’94 Oldsmobile Cutlass . It will run fine 20 to 50 miles and never miss a thing! Then it will shut off as if you’d turned the key off. It was starting right back up, but now, it won’t until it cools off! Why? Could it be coil packs? A replacement coil pack is non-returnable if it doesn’t fix it. Everyone I talk to has different answers; I need some help. I'm going to have a baby soon and I need my car!

- Kay

A: It is a rare day that a coil pack completely fails and then once cooled comes back to life. Generally, a failing coil pack will cause the engine to skip and misfire like there was a bad spark plug or spark plug wire. There are 2 components that come to mind that could possibly cause the problem you’re describing. They are the ignition module or the crankshaft position sensor. The component that is the most troubling in our shop is the crankshaft position sensor. If crankshaft position sensor information is lost, the fuel and spark will be turned off instantly as if the key had been turned off. This sensor also has the irritating ability to get better and perform as if there never was a problem. The ignition module can cause problems but is often more flamboyant as it is failing. Both components are sensitive to heat. Diagnosing either component when they have failed is not too difficult. When the vehicle is running right, it is only guess work. If you were to ask for a guess, I would lean towards the crankshaft position sensor based on past experience, but that is only a guess. One last note, the crankshaft position sensor is not much money but can be a real bugger to change if you live in the rust belt.

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