An update on a shudder problem I reported several weeks ago. When car is in drive and slowing down and stopping at a stop sign or red light it would shudder at about 500 RPM for a few seconds and then even out and move to about 600.It was getting worse. I had just replaced the plugs about 3000 miles ago when I got the car(wagon). Last week I replaced the cap and rotor. The cap was all gunky with red-tinged stuff in it and the mechanic said it has been arching in back of the cap. we replaced wires also. This did not correct the shudder. Today I checked the plugs and replaced them with a Bosch Super plug. Amazingly the plugs I took out had a gas smell to them-especially the back
- One had a piece of residue on the tip. The new plugs have corrected the shudder. I assume the plugs were fouled and were causing the drivability problem. Also, I rechecked the throttle body-had just cleaned it and there was a small amount of red-tingled residue in it. Is there anything else I need to be doing? I'm not sure what is causing the reddish stuff to get in there in such a short time after cleaning the throttle body. Sorry for the long post. Need assistance. Thanks, J. B.