Impala Forums banner
1 - 1 of 6 Posts

· Registered
2 Posts

Could be the PCV valve is bad or the vacuum hose or port is plugged. This happened to my 1990 chevy 350 TPI. The port in the throttle body was completely plugged and the service engine soon lit would come on after I drove it for a while. Usually the SES light is related to an emmision component so you should concentrate your search in those areas first.
1 - 1 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.