A flashing check engine light means it has a bad steady miss.A cylinder basically not firing at all.
It sounds like a bad plug wire. How were the ends that snap onto the plugs when yo did the plugs?
The jumping speedo could very well be spark energy jumping out of the insulation of the wire and shunting into the wiring and messing with the gauges.
Look at wires at night with under hood light out. Shake the wires a bit. Look for high energy current running/jumping/arcing around.
I would replace them, or ohm them out with a DVOM to make sure there is not one with high resistance or even a total break in conductivity between the ends.
Monday, November 19th, 2007 AT 12:15 AM