I think it could be. I have the same problem with my car amung others. Im changing the EGR and the idle control sensor this week. my car surges when on the highway, doesnt want to idle, and backfires in the intake when it is cold. Diognostics said it was the EGR, EGR vaccuum sensor, and the idle control sensor. Hope thats some help.
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98 Cobra, CAI, Flowmasters, o/r h-pipe. 4.10s, Hurst shifter.
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