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I had the same problem problem. Along with engine dying suddenly at stop light or when turning at very low speed. The shop that fixed the problem changed the faulty Fuel pressure Regulator(auto part stores sell it for around 60 bucks). Their explanation was that the regulator DID not release pressure so there was plenty of gas for higher RPM. But at low RPM it acted like flooding the engine (kind of like in the old carburetor days).

Anyway the problem did go away.

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โˆ™ 2011-09-13 17:52:25
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Q: What would cause a 1999 olds intrigue with a 3.5 start hard the first time has new plugs filters PCV Air Fuel good fuel pressure new coil pack throwing no codes and runs great when started?
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