in post#26 you said " It has the Mitsubishi sensor. I replaced with the accel one"

???

 

Sorry about the confusion I was answering to many things at one. It should have been like this.

Mitsubishi sensor question.
It has the Mitsubishi sensor.

What brand of cap and rotor did you replace it with.
I replaced it with the accel one.

 

Just wrapped up messing with the car again.
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Checked voltage at injectors all good.

Removed the opti again. Turned the ignition on the fuel pump primed. Then spun it by hand nothing. The fuel pump primed again and then I spun it again this time I could hear all the injectors clicking and the fuel pump was just on and I had an arc from the coil wire onto the block. Then the fuel pump started to do it's weird cycling that was in the video above. I spun the opti again and nothing. No spark no injectors clicking. I checked a few things I have 12v into the opti and a good ground. I cut up my old harness to test for the low and high res signals using a volt meter and watching a video on how to do it. My results were not of what were in the video.
Just sitting not touching the car with the opti connected with the good harness and igniton on the fuel pump kept doing that weird cycling while I responded to the previous message. Then I unplugged the opti and let it sit for 5 minutes and the fuel pump did nothing with the ignition on.

So I'm guessing that I possibly have a bad optical sensor. Ive read the petris opti is good but it's also 500 bucks with shipping and tax. Are there any other options? I'm fine spending 500 bucks knowing I'd have a handle on this issue but spending it and then figuring out it's still busted is hard to handle.

 

Did you check the Opti signals with the ‘scope (post #23)?

 

No. The scope I have access to is 30 minutes away. From what I was researching I should still be able to test with just a voltmeter but you wouldn't be able to see the square wave just an average. I had no change on the signal wires on my voltmeter.

 

If the Opti is off the engine, rotate it slowly on the low res, and the meter should be switching back and forth 8 times in one revolution. The 5V pulses will be spaced far apart. The exact shape of the pulse is not as important as the length (number of degrees rotation) of each of the eight pulses. The length of the pulse defines which cylinder is approaching TDC. The high res has to be turned VERY slowly. There are 360 slots in the disc, so the voltage will switch 360 times in one rotation.

If you are getting DTC 36, the high res is being lost. The slots in the wheel could be blocked by rust or oil. Or the emitter/receptor in the module is defective, or blocked by rust, oil, etc. Or the corroded pin is causing issues.

The fuel pump intermittently priming is still a mystery. It could be caused by the 12V supply to the PCM being intermittent, either externally or internally. The initial prime is not dependent on the Opti signal.

 

When messing with the Opti you really need a scope to know for sure and driving 30 minutes would be worth it unless you want to spend $500 for nothing.

 

After a few days off I had more time. I never had the opportunity to get the scope but I still plan to scope this sensor. I just went at it with the multimeter again. I was getting around 4 volts steady no matter what I did on both high and low. The corroded pin was cleaned up when I took it apart and it seemed to make no difference. I think the opti sensor was causing the random fuel pump cycle. Like I said I also had a random spark I was seeing when manually spinning the opti. I couldn't see that when it was all assembled.

So I ordered an opti. Received it Friday and installed that night. Started up after a few seconds of cranking I guess the needed to burn off the unburnt fuel. I shut down after like 15 seconds due to not having the water pump installed.

Went out yesterday and installed everything. Today I topped off the coolant and drove around for about an hour. Everything feels great. No knocks, no issues with the engine starting or staying running. A/c compressor is not coming on but that can be a springtime problem.

But thanks to all you guys for helping out. I am going to update soon when I scope that sensor and get some more miles on the car.

 

what opti did you get?

 

Petris there does not seem to be many options anymore.

 

Put maybe 25 miles on in total so far. Everything still good. The weather took a turn for the cold recently.