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So the 4.47v is coming from the raw egt voltage imput on ECMlink. When i throw a multimeter on 5v power to sensor ground i get a full 5v reading. The 4.47v is only being read on ecmlink, everything else looks to be fine. I checked the pins through the ecu to verify that they are the correct ones, tried a different sensor to rule out that i might have gotten a DOA sensor. Im not sure if it could be something within ECMlink thats not reading properly? Or possibly something else.Maybe we can help you figure it out. Where are you measuring 4.47V and how are you measuring it? I'm assuming you have 3 wires connected to the sensor (sensor 5V from ecu, sensor ground from ecu, and EGR input)? Are you measuring 4.47V from sensor 5V to sensor ground? You wouldn't happen to be measuring to chassis ground instead would you?
So the 4.47v is coming from the raw egt voltage imput on ECMlink. When i throw a multimeter on 5v power to sensor ground i get a full 5v reading. The 4.47v is only being read on ecmlink, everything else looks to be fine. I checked the pins through the ecu to verify that they are the correct ones, tried a different sensor to rule out that i might have gotten a DOA sensor. Im not sure if it could be something within ECMlink thats not reading properly? Or possibly something else.
So i shot continuity from sensor output to pin 15. And it does not have continuity. So i guess this means i have a break somewhere, or theres another blue yellow wire that ive tapped into guess ill have to look into this weekendOk, good, so sensor power is verified good. And you verified that the autometer sensor output is going to pin 15 on the ECU? A good test to try would be to remove the autometer sensor output from the ecu and just measure it with a multimeter by itself. It should follow this table that shows output voltage vs pressure:This will tell us if it's something with the sensor or the ecu.Sensor Specifications
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Per the previous owner it was “street tuned” at 23psi. I dont know who was the tuner before, I think it was possibly one of his friends. Regardless i backed out the mbc a bit and im right around 18psi on 93. I set the AFPR to 42psi pre vacuum and post vacuum if i remember correctly it settled somewhere around 36-38psi (cant remember exactly). Kevin Jewer has been working on a retune with me and from the logs I've sent him it seems to be fuel starving occasionally. We’ve yet to really trouble shoot the fuel starve since ive been dealing with the fuel pressure sensor issueFor your knock issue. What psi of boost are you running and what level of octane are you running in your fuel? Also have you set your AFPR to the correct psi? I don't know this forsure but I heard the 1G knock sensors are trash, possible phantom knock?
Well after a little bit longer of poking around at it this weekend i finally found the issue. As dumb and simple as it may be, i ended up bypassing that original blue/yellow wire and just ran signal input straight into the ecu and it works perfectly now. So there must have been a break somewhere in the original wireHaha! Let us know what you find.
Interesting, i havent looked at the plug wires since i bought it. Ill have to take a look at then tomorrowWhile it may seem aesthetically right, your plug wires are ran wrong. The little arrows in the valley are there for a reason and they guide you to keeping one pair of wires away from the other. 1 and 4 should be on the passenger side of the rubber grommet and run along the top of the valley. 2 and 3 should be on the driver side of the grommet and ran along the bottom of the valley. 1+4 and 2+3 should be kept away from each other as much as possible. This prevents crossfire due to inductance. Maybe it matters, maybe it doesn't, but I'd personally do it right.