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

90 Chevy Beretta, Stalling Problems
Q: I bought (with a lot of his money, too) my 17 year old son a '90 Chevy Beretta. It's great looking and I had it checked out by my mechanic. About 1 week after he had it , it started to stall out periodically. This happens when he first starts it and begins to drive. He can only go 10mph and then it will stall. If he pulls over and shuts it off and restarts it, it's fine. Neither the dealer nor my mechanic can find anything. They put in a new ignition module and coil pack (whatever they are) and checked the grounds and the wires. One mentioned the computer being replaced. I'm frustrated and thinking about asking for my money back, if that would even work, but my son just wants it fixed...Sally.

A: We've seen some strange computer problems with vehicles of your type. The difficulty is in proving that the computer is the problem\cause. The procedure we use to identify a problematic computer is about as odd as the problem itself. The vehicle's computer is removed from its hiding place in the dash and the electrical connectors are inspected. Then with the engine running the computer gets a slap. If the engine shutters or stalls then the computer has a problem. If the engine doesn't act up, the computer is left hanging by its electrical harness and a hair dryer is positioned to blow hot air on the computer. Heat helps to aggravate computer type problems. In the meantime, a computer scan tool and PC is connected to the computer's diagnostic connector. With the engine running the PC is commanded to download the data from the vehicle's computer. Once again the computer is slapped and the electrical connectors are wiggled. Then the data recorded from the vehicle's computer is reviewed. Because the vehicle is just idling in the shop bay there should be no sudden changes in the recorded data. Example; one problem computer was thinking that the vehicle was going from 0 to over 200 mph in the shop bay in two seconds. A replacement computer corrected that vehicle's problem. Diagnosis of difficult computer related problems is not a 15 minutes job. Careful diagnosis by a qualified technician should pin down the cause to your stalling problem.

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