3.8 V6 runs great, idles fine, goes good up and down the road until it gets hot...won't idle right. Mechanic is great at diagnosing problems but has come to a dead end. No vacuum leaks. TPS replaced...essentially everything else I have read about online has been done. The computer has been replaced.The issue still persists. Wondering now if there is a crack in the intake manifold that opens up when its gets hot? Fuel pressure is right. Anybody seen this before? It's really amazing how good this thing runs except for the idle. Help me!
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