Quote:
Originally Posted by tempfixit
I assume you did not have the valve covers off when the plenium was off. I still think it has something to do with the valve train, broken push rod or rocker arm loose and tapping against the valve cover creating the noise. Only way to find out is remove valve covers and look.
Take a look at your camshaft sensor and syncronizer and see what condition they are in, before getting parts. Same with crankshaft sensor.
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Well, I'll ask you again, I did a valve compression test, it was perfect, so why would that be necessary? If the valve had problems, it would not give good compression, right? I never get an answer to that question, tho my comment makes a lot of sense. The valve compression test would show no compression if the valve system, rocker, or whatever was not working right, right?, and it all came out just fine. 120-130 psi, had to be over 101 psi. But it all was, with each and every valve working just fine.
I did not get the noise when I took off the spark plugs for the compression test, not at all. As my friend, and common sense as I understand it would state, if it was a valve problem, the compression test would have had a dead cylinder, but if it was an electrical problem, the electrical problem would disappear when the electrical stuff like the plugs were disconnected from the engine. It did disappear. That would seem to be some sort of electrical problem. Right? not a valve problem since the cylinder compressio ntest was perfect-only ten pounds of difference between the valves, and nothing else? Plus, the noise disappeared completely?
That would mean , to my understanding, the camshaft or crankcase positioning sensor. I know from reading enough here that the sensors, coil pack, and even the spark plugs can read or seem fine, but the problem disappears once they are all replaced. I seem to be the only person that the problem has continued with, but I didn't replace those two sensors.
Now, valve thing read fine. Why would the valve train or anything else or springs, or anything with the valves be bad, if the valve compression test is fine?
Can anyone answer that?
I cannot see the cp sensor, just the camshaft. It looks dirty, dusty, but hat is it. But it is electronic. It could be dead, shorted, or whatever, just as the coil pack was bad on two cells, and the wires were bad too, since it does not stall anymore, but still makes the popping sound.
Now, am I missing something here? Could the valve train be a total piece of crap, yet still give perfect compression scores, despite not functioning?