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Check the fuel pressure. It will tell you if the pump, fuel filter, and fuel pressure regulator are all good. Fuel pressure is critical on fuel injected engines.
Check your spark plugs for wear or the wrong gap.
Another possibility is a vacuum or air leak. Check all vacuum hoses and the intake manifold gasket. The GM 3.8L engine is prone to lower intake manifold gasket failures. Sometimes the upper intake gasket, too.
find the fuel pressure regulator. you should see it mounted on the return line of the fuel rail under the plastic engine cover. it will have a small vacuum hose attached to it. Remove the hose and see if gas comes out of the regulator. If it does replace it immediately.
Improve the FixYa experience for everyone by voting. Hi Steven Phillips: It's possible but not very likely unless there has been a recent removal of the injectors and new O rings were not installed. I suggest that you take the vehicle to the closest AutoZone and have them perform a fuel pressure test and a full diagnostic scan. Both are free of charge. It's possible that you have leaking fuel line or fuel pressure regulator. The pressure test will enable you to evaluate both possibilities. Incidentally, replacing O rings, fuel lines and pressure regulators are fixes you can do yourself. Feel free to follow up with me should you so desire. All the best, Ben
check fuel pressure are fuel rail? Should be 40-47 psi. Also check filter at rear frame rail near RR tire, pull vacuum line off fuel pressure regulator at intake mainfold. Should have vac. and be dry, no gas at fitting.
The nipple that will leak it on the regulator, its a device that is about a inch around and sits just forward of the intake. The other end of the hose leads up to the top of the throttle body.
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