1989 Gmc C3500 Truck Been Having Electrical Problems Driving 60 Mph Just Shuts

234,081 MILES
Avatar
ANONYMOUS
  • MEMBER
  • 1 POST
My truck has been having electrical problems. driving at 60 MPH it just shuts down for no reason. Then starts running again and backfires.
Feb 5, 2013 at 11:44 AM
Advertisement
Avatar
CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
IN AN ORDERLY FASHION AND SEQUENCE

***********WATCH OUT FOR THEM PESKY MOVING PARTS!!!!

LOOK AROUND METAL AND HOT SURFACES FOR A WIRE TOUCHING OR CHAFING INTERMITTENTLY------STAND TO THE SIDE AND HAVE SOMEONE HOLD THE BRAKE AND PUT IT IN GEAR (SEE WHICH WAY THE ENGINE TORQUES AND WHAT MOVES ALONG WITH IT

SEE IF CONNECTIONS ARE TIGHT

CRANK HIM UP---PUT HIM IN PARK------ SHAKE/PUSH/ PULL/ WIGGLE/ WINDMILL EVERY WIRE YOU CAN FIND, ESPECIALLY NEAR IGNITION COMPONENTS...........NOW THAT YOU KNOW WHICH WAY IT TORQUES THIS MAY AID IN WHAT TO PAY SPECIAL ATTENTION TO

DURING THE SHAKING---IF IT CUTS OFF....YOU ARE REALLY CLOSE!

THIS MAY NOT BE YOUR FIX---I'VE SEEN THE SAME SYMPTOMS, EVEN A FEW DAYS AGO-------BUT THIS DOESN'T COST A THING TO TRY!

THE MEDIC

Feb 5, 2013 at 7:11 PM
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.

Frequently Asked Problems for This Vehicle