Quote:
Originally Posted by Sugar Bear
On GM HEI in the late 70's to the 90's rotors frequently burned due to bad plug wires...different manufacturer but same principle. The rotor would burn a hole in the plastic and short circuit the spark to ground through via the distributor shaft. The fix was cap, rotor and wires. A telltale was a buildup of black powder/dust under the rotor.
Good luck and please let us know what you find.
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Ok, so here's my findings for the parts that are on the car, but no start:
1.Distributor cap terminal from inner to outer were at 1kΩ - 1.1kΩ
(FSM is 700 - 1.3kΩ)
2.Ignition coil terminal 1 & terminal 15 was <1Ω
(FSM is < 1Ω)
3.Ignition coil terminal 1 & 4 was 998 Ω
(FSM is 8- 1.3kΩ)
4.Spark plug wires were 1kΩ
(FSM 700 - 1.3kΩ per cable)
5. Spark plugs were 0Ω
(FSM only states .8mm gap which mine were)
6. Ignition rotor from center to edge was 1kΩ
(FSM is 700 - 1.3kΩ)
I just replaced the spark plug wires with brand new wires which were tested and within spec. I also replaced the ignition rotor with a brand new rotor which is within spec as well. Car started right up with the new wires and rotor. I'm at a loss how this is possible if the old ones all tested within spec. Also, the car started up fine last night and I drove about 60 miles with no issues and inly woke up to find the no start problem. As of now car seems ok, but I would still like to get to the bottom of this, though I won't touch any of the components that are on the car now as it seems ok and I can't risk it not starting again. I guess even with troubleshooting and getting passing results, throwing parts at the problem seemed to correct it, but I'm skeptical. What do you all think? The new wires and old wires both had about the same readings as well as the rotor.
