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Did KOEO test and got code 33 - egr. Did elec test on sensor while applying vacuum. I heard the egr move but didn't get quite the ohm range I was supposed to. Tried to start the truck after that and now won't start. Started fine earlier. Appears I'm not getting spark from the coil.
After self-test, I removed jumper from STI connector to ground before turning ignition off. Could that have ruined the computer? Thanks.
After checkinf the ignition system and finding no trouble, except that there was no spark, I decided to disconnect the connector to the EGR. Truck started right up. I don't understand what happened except that a signal from that sensor might have had the ECU disabling spark somehow.
Ran the truck with the sensor disconnected and EGR vacuum port plugged and the bucking and hesitation was gone. Gonna replace both those components.