Acceleration Hiccups Unmasked Could Old Spark Plugs Be the Orchestrators?

3: Your plugs have lost their spark. If your car starts shaking and jerking when you press down on the accelerator, or if starts to feel like ... The most likely miss fire cause is a bad coil pack on #3. You need to get this fixed, if you continue to drive the car with the miss it will fill the catalytic ... ... spark plugs, and works normally when old plugs re ... Once the insulator gets polluted, it will cause power leakage. The ... My van has a rumbling sensation around 40-45mph, it stops if I stop accelerating or if I accelerate a lot faster out of that range, was wondering what that ... Yes, bad spark plugs can indeed cause a car to shake. When spark plugs wear out or malfunction, they fail to ignite the fuel-air mixture properly. You may have a loose plug or two as well. Might be a coil pack, more than one going bad would be unlikely. Just one cylinder misfiring can be ... Vibration/shaking increases in frequency with speed. It happens on and off, but I can't find a correlation with temperature or driving ... Ignition timing retarded can cause hesitation when accelerating. I ... Guess I'll have to clean the spark plugs again after the oil burns off. Compression's good. 10% between the high and low reading is good. Have you checked your spark plug wire or spark Plugs? That will cause your ... However, in 3rd and 4th, with cylinder pressure getting much higher under boost, you need those plugs gapped tight to ensure the spark makes it ...