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You need to verify that you have spark, and that it's a strong, blue white spark.
If it's not, you might have a bad coil, or if it's a Bosch ignition, a bad power stage. Bosch coils look like a cylinder (usually black, sometimes silver or blue). The other ignition used in some 89-up cars is the Regina ignition- the coil looks like an aluminum cube with fins. The Regina system doesn't have a power stage, so you'd have to replace the whole coil if it's faulty.
Try to see if the spark is constant and strong as you crank the engine.
I'd place the coil wire over on the fender, near to but not touching metal, and have someone crank it over while you observe the spark.
I assume that you DO have spark, but you need to make sure. At least the primary side is working- without the RPM sensor the fuel pumps wouldn't run. Have you inspected spark plugs and the distributor cap? Check those for condition and replace if not in great shape.
Good luck!
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Rob Bareiss, New London CT ::: '87 244DL/M47- 229K, 88 744GLE- 218K, 82 245T-181K Also responsible for the care and feeding of: 88 745GLE, 231K, 87 244DL, 239K, 88 245DL, 246K
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