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I was wondering if anyone else has experienced this problem: the rear cylinder on my CA model 2001 RC51 doesn't fire. We; the mystified mechanic and I have replaced the spark plug checked the fuel pressure swapped out the throttle bodies with a 49 state model to no avail. It will fire/ignite if either is sprayed into the rear throttle body. Any help would be appreciated.
 

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Have you checked to see if you have voltage reaching the injectors? If so, have you tested the injectors? Likely a broken wire in the harness or loose connection.
 

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1) Are you getting any FI errors?
2) When you pull the plug, is it wet or dry?

If you spray ether into the cylinder and it fires, then you're getting a spark.

If your plug is dry, then you're not getting fuel sprayed into the cylinder, but I'd expect an FI fault code 12 (injector 1-1) if the low throttle opening injector coil or wiring was shorted or open.

Use the service manual to verify both injectors coils for the non-firing cylinder (cylinder 1).

The #1 cylinder exhaust cam has the cam pulse generator sensor, but that too would cause an FI error, and the entire engine would fail to start.
 
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