Hi everyone new here. Have 1991 cressida wagon. Have what I think is an ingition problem. Went through about every thing else. Will run good then at any time it sounds like half the cylinders are running, missing very badley. If you catch it in time you can put it in netural. press all the way down in accelator an it will run up to about 1200 rpm. with it missing badly. Then just like fliping a switch it will run right. Back off the accelator put it into drive an it will run great untill it happens again. Seems to happen a lot if the tempature is above 70 degrees outside.