truck isn't getting any spark possible bad ignition switch (not tumbler)

1994 CHEVROLET SILVERADO
161,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
Avatar
SPARKYGIZMO
  • MEMBER
  • 4 POSTS
i think my ignition switch is bad because its not sending spark to the ignition coil. but the truck still turns over and fuel still gets to the throttle body i have replaced the whole entire distributor, also the icv and map senor.
Aug 25, 2016 at 11:02 AM
Avatar
TWYSTED696
  • MEMBER
  • 2 POSTS
Have you tested the ignition switch with a volt meter to check your theory
Aug 25, 2016 at 11:08 AM
Avatar
SPARKYGIZMO
  • MEMBER
  • 4 POSTS
yes zero
Aug 25, 2016 at 11:09 AM
Avatar
TWYSTED696
  • MEMBER
  • 2 POSTS
Did you make sure your battery is plugged in?
Aug 25, 2016 at 11:13 AM
Avatar
SPARKYGIZMO
  • MEMBER
  • 4 POSTS
yes...
Aug 25, 2016 at 11:17 AM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
https://www.2carpros.com/articles/how-to-test-an-ignition-system
I posted a article to help you step by step let me know what you find and we will go from there.
Aug 25, 2016 at 11:41 AM
Avatar
SPARKYGIZMO
  • MEMBER
  • 4 POSTS
Saturntech i have only one "coil pact" i have a ignition coil
Aug 25, 2016 at 11:44 AM
Avatar
SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
With the key in the run position use a volt meter ground the black lead to the engine.Then hook the red lead to the b terminal connector going to the coil you should see battery voltage.Also unplug your pick up coil and measure the resistance of it should be 500-1500 ohms .
Aug 25, 2016 at 1:54 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