Question about 1990 Toyota Corolla
Check for a malfunctioning EGR valve. This valve is only selected to perform when the engine is warm. It has a vacuum diaphragm which can crack and lead to vacuum leaks. This will cause rough running. The EGR valve should be vacuum checked to see if this diaphragm is leaking. This valve can also stick open due to carbon deposits. When the valve sticks open, the fuel/air mixture is leaned out and rough running ensues. This problem is practically expected on a vehicle of that age.
Posted on Mar 21, 2011
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:
Jun 20, 2014 | 1990 Toyota 4Runner
Apr 04, 2014 | 1990 Chevrolet C1500
Feb 10, 2013 | 1990 Oldsmobile Cutlass Supreme Conv
Nov 06, 2012 | 1986 Nissan Maxima
Mar 29, 2010 | 1990 Ford Probe
Dec 12, 2009 | 1990 Cadillac Deville
Oct 03, 2009 | 1990 Toyota Corolla
Dec 09, 2008 | 1990 Mazda 626
514 people viewed this question
Usually answered in minutes!