Generally, if it crank 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 and fuel injector pulse, if your missing everything, I'd check the cam and crank sensor signals. If only one system has a problem, we can check that one system. Could be other issues?
SOURCE: 1997 plymouth voyager radiator fans
I don't believe your particular vehicle's cooling system needs to be bled during coolant filling, but check the coolant level first. It seems that the coolant level is too low for the sensors to be able to sense the temperature, or the sensors are disconnected. Look for a connector on the intake manifold, near the coolant outlet. Ensure it is properly connected.
SOURCE: Hello, how many o2 sensors on a 93 plymouth
Upstream would be before the Catalitic converter. You need one after, or downstream also. Most v-6 engines will have three (Two upstream, before cat) and one or two downstream. (After cat)
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