1991 Volvo 240 Backfire

1991 VOLVO 240
180,000 MILES
Avatar
PMGREEN
  • MEMBER
  • 2 POSTS
When the engine is warm, the car will backfire when starting. Nothing more. I used a fuel injector cleaner, Chevron Techron to no avail. What is the cause and how may I fix this? Backfire is through the exhaust.
Aug 24, 2013 at 11:01 AM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
you have a timing issue. if the timing is off, it will backfire out the intake or exhaust. how old is the timing belt.

Roy
Aug 25, 2013 at 7:44 AM
Avatar
PMGREEN
  • MEMBER
  • 2 POSTS
Timing belt was replaced less than 10,000 ago.

Aug 25, 2013 at 9:28 AM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
I would still check it for being in time.

start with a compression test.

Roy
Aug 25, 2013 at 9:38 AM
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 Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.