Having problems with your 1998 GMC Sierra ?

Wont start 1998 GMC 305 vortec wont start the las couple mornings. After exposing throttle body and opening flapper, truck starts and runs fine. Can hear full pump running. Any thoughts?

Posted / edited by AnonymousUser on : 26-09-2022

Answers :

Fuel pump ok...clean inside the throttle body with spray carb cleaner...make sure the engine is cool and do not start it while real wet with carb clnr...BETTER YET,,,,get yourself a can of [email protected] (9$), and follow directions on can to clean your fuel system...it works great...your car does smoke while your using it but goes away quickly...makes big diff in the way your 305 runs....hope this helps....thanks
Simpler that exposing the throttle body just depress the accelerator 3/4 and try to start.

If like before, the vehicle starts... watch the rear view mirror for black smoke

both indicates a leaking injector(s)
Repair Help & Product Troubleshooting for 1998 GMC Sierra

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

Loading ...

  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0054 seconds