Most Recent Video. This standard picnic table is made unique in the easy to build instructions. Featuring ample seating and a sturdy top, paint yours a bold bright color to brighten up any outdoor (or indoor) space. Special thanks to our readers for sharing their photos.
Step 18 - Each intake and exhaust valve utilizes a spring which will return the valve to its original position (closed). If a valve spring has broken or a cam lobe has worn down, it will cause the engine to misfire and run rough due to the loss of compression.
Gasoline engines run an aggressive spark advance curve and rely on EGR to prevent engine ping. If the EGR valve has clogged or stuck (or been blocked by those seeking to improve mileage), the quick advance curve will cause the engine to ping. If all else has failed, verify that the EGR circuit is functioning properly.