Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: car did not pass smogg on 1990 Toyota Tercel

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my car did not pass the smogg... the hc was too high what could be the problem...
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
There could be a number of things that cause high HC. In most cases HC is related to some type of ignition issue, but could also be related to timing, and also a worn engine. A catalyst that's marginal sometimes won't clean up the exhaust enough and can cause high HC. It's best to have a qualified technician take a look at the problem for a correct diagnosis. There are so many issues that could cause high HC it's best to have someone take a look at variables to narrow it down for you.
Didn't find what you were looking for?