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.
1 Vacuum leak, again like above. 2  Fuel delivery issues, like clogged fuel filter or weak fuel pump will sometimes cause an engine to chug and stall at low speeds.  Base engine issues, like cam/crank timing can really cause erratic behavior at all engine speeds, but again may be more noticeable at a stop.