1987 Chevy Camaro Smog Emissions with a leaking intake mani

1987 CHEVROLET CAMARO
183,000 MILES • V8 • 2WD • MANUAL
Avatar
M_FAWCETT
  • MEMBER
  • 1 POST
The car just failed the smog test with a CO emission of 0.92 @15 mph. Troubleshooting revealed a leak in the intake manifold gasket at the head near the #1 cylinder. The car has recently had a new EGR valve (<100 miles) and, not too long ago, a new Oxygen sensor (<10,000 miles). The leak is not noticable in the car's idle. I assume the car is compensating for the leak when the control loop is closed. But, can this kind of leak cause the CO emission problem that was measured?

Thank you in advance for any light you can shed on this.

Regards,
Mike.
May 3, 2008 at 1:29 PM
Advertisement
Avatar
PRODRIGU
  • MEMBER
  • 26 POSTS
Yes it can, you may also check the other vacuum lines for leaks as well. Usually a rich mixture is caused by a vacuum leak 99% of the time.
May 18, 2008 at 4:15 AM
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