1990 Pontiac Grand Prix Does ECM Having Problems Cause Tach Speedometer Read

1990 PONTIAC GRAND PRIX
107,000 MILES
Avatar
ANONYMOUS
  • MEMBER
  • 1 POST
Does the ecm having problems cause the tach and speedometer to read twice as high and make the car rev and stall when warm and restarted.
Jan 1, 2013 at 5:22 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
yes, try tapping on it while running and it may faulter. common failure

Roy
Jan 1, 2013 at 5:23 PM
Avatar
TAWARREN
  • MEMBER
  • 4 POSTS
Thank you. We have changed so many things trying to find problem. The only thing we have not changed is the map sensor.
Jan 1, 2013 at 5:33 PM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
do not get a used one the new ones are about 100 bucks

roy
Jan 1, 2013 at 5:34 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle