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D15b2 surging issue
I have beeen fighting a surging problem for a while now. I've read the other suggestions on this forum. Already checked the iacv, cleaned it out, with no effect. Changed the intake manifold, including all the sensors(TPS, IACV etc..) and vaccum lines. Still the same issue, surges while idling. The only thing I can see wrong is that the fan stays on all the time. I'm thinking there's a short or a bad relay, or possible bad ECT. The temperature is fine though, doesn't overheat and stays steady. Any suggetions would be helpful. thanks.
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