Question about 1990 Toyota Corolla
A couple of things come to mind here. First, check with the previous owner and find out what octaine number gas he was using. If you are using the wrong octaine gas on a high mileage motor you can get the knocking sound. Second the rough idling may be a vacuum/air leak. Check all your air hoses and connections. If you find any disconnected hoses look for an empty connection. If no connection plug the hose and see if that helps.
Posted on Feb 17, 2012
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Aug 25, 2017 | Toyota Cars & Trucks
Dec 21, 2013 | Cars & Trucks
Apr 06, 2013 | 2009 Toyota Corolla
Jul 08, 2010 | 1993 Toyota Corolla
Apr 15, 2010 | 1991 Toyota Corolla
Aug 19, 2009 | 2004 Toyota Corolla
Jul 17, 2009 | 1991 Toyota Corolla
Jun 11, 2009 | 1990 Toyota Corolla
May 26, 2009 | 1994 Toyota Corolla
121 people viewed this question
Usually answered in minutes!