Question about 2002 Oldsmobile Alero
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Posted on Jan 02, 2017
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Make sure the battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also, check fuel injector pulse. If your missing everything, check cam and crank sensors.
With engine cranking check primary voltage to coil and fuel injectors, brown wire with white tracer. If no voltage leads back to asd relay. I'm not saying that relay is faulty. You can see fuse for that relay, that fuse circuit is hot all the time. The computer grounds the control side of relay if it sees proper cam and crank signals.
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