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Attaches to the block? Oil pressure sensor I think

Yes it can be tested with an ohm meter. But if your engine is running, it is working. If you onm it while the engine turns over, it will make the ohm meter fluctuate up and down. To get an exact...

No, it is the same. Camshaft position sensor is the official name. Is it still stalling?

No I wouldn't. But you have found one bad wire, I would look for more bad wires or connections

Coils can go bad. I have replaced two recently and now I carry a spare. An ECM can throw a code that it is bad or not. Sometimes that is an experimental thing

Alright, now it is time to look at the rest of it. See if it still does that stuff

At this point, I think you need to consider an new PCM. Multiple codes and the voltage problem with new stuff is not a good sign

If your battery is bad, I suggest you fix that. All the electronics nowadays need a solid electrical source to function properly

What do you have running when this happens

It could. get your voltage straightened out and go from there. at 10V stuff starts not working

Take your alternator down to an auto parts store and have them test it

If it is turning over with the key on, then yes, constant spark

It is just a fact that sensors are not what they used to be. I got that from a GM parts counter as I returned one that was bad right out of the box. But if you test it and it is bad, it does not...

It means the sensor is going bad, and has intermittent operation as many sensors do

If you have the no spark issue, then it is likely the cam position sensor is the culprit. This sensor is responsible for getting the coil to go to ground and make a short duration spark. It is...

I think you should get that battery fully charged and go from there

the PO1391 is loss of crankshaft or camshaft position sensor signal. The CMS is in the distributor. to check to see if that is working, turn it over with key on and pull the coil wire at the dizzy...

I am not there to help you on that one. But look all conections involved and that new pickup in the dizzy. Coil.too maybe

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The tach measures number of spark pulses. So if that needle starts jumping then the spark from the coil is eratic.

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Fuel pump relay should be on whenever the Key is turned

No, you can pull one for that year and just plug it in.

Yes

At this point, I am thinking the same thing

It looks like you have the wires all rotated a little. You have to have the distributor timed properly for it to run right. The computer can make up for some of it, but not entirely. Tony has a...

If you did that, the 300 codes will tell you which ones to switch