1991 Volvo 740 not blowing

1991 VOLVO 740
314,000 MILES • 4 CYL • 2WD • AUTOMATIC
Avatar
VOLVOLOVER
  • MEMBER
  • 1 POST
when car is idle the ac is great, but when i accelerate it dosent some out the vents until i am off the gas.
Aug 22, 2008 at 11:24 AM
Advertisement
Avatar
2CARPRO JACK
  • ✓ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
check for a leak in the source vacuum line that goes from the hvac control to the engine. Might have a check valve on it that is bad or a small leak in the line
Aug 22, 2008 at 11:50 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.