Robsevo9 Posted December 17, 2023 Report Share Posted December 17, 2023 hello, i was wondering if anyone has had this issue here, i changed the sensor and still get a dead sensor, wires are correct looking at the sensor with the tab up...ground left, 5v right and signal bottom which i tested for power and it gets none...that signal is wired to pin 61 on my link.. is there any other wire i can use? or is the wire ok? does is need to have power with the key on? 1 minute ago, Robsevo9 said: hello, i was wondering if anyone has had this issue here, i changed the sensor and still get a dead sensor, wires are correct looking at the sensor with the tab up...ground left, 5v right and signal bottom which i tested for power and it gets none...that signal is wired to pin 61 on my link.. is there any other wire i can use? or is the wire ok? does is need to have power with the key on? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 17, 2023 Report Share Posted December 17, 2023 Your pic is too small to see anything, you would be better to attach your tune and a short log. What do you mean by "dead"? Is PC link showing no voltage on the AN Volt input or is it shorting the 5V output or some other issue? Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 17, 2023 Author Report Share Posted December 17, 2023 25 minutes ago, Adamw said: Your pic is too small to see anything, you would be better to attach your tune and a short log. What do you mean by "dead"? Is PC link showing no voltage on the AN Volt input or is it shorting the 5V output or some other issue? Hey, it’s showing dead I tried but it says the file is too big, anvolt2 is 1.06 Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 17, 2023 Report Share Posted December 17, 2023 23 minutes ago, Adamw said: What do you mean by "dead"? You didnt answer this. Your pic is very hard to see but it very much looks like AN Volt 2 says Active to me and is showing a voltage. You have used up all your attachment allowance, you can share your files using google drive, onedrive etc. Have you connected all 3 sensor wires via the MAF plug? Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 17, 2023 Author Report Share Posted December 17, 2023 54 minutes ago, Adamw said: You didnt answer this. Your pic is very hard to see but it very much looks like AN Volt 2 says Active to me and is showing a voltage. You have used up all your attachment allowance, you can share your files using google drive, onedrive etc. Have you connected all 3 sensor wires via the MAF plug? Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 17, 2023 Author Report Share Posted December 17, 2023 no maf plug I did ground to chassis, pos via link ecu and signal pin 62 going into the link. Ok let me try sending the file. And yes it shows voltage but tuner says it’s dead that’s why the car isn’t turning on because of that Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 17, 2023 Report Share Posted December 17, 2023 The fuel press sensor isnt going to prevent the the car turning on or running. Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 18, 2023 Author Report Share Posted December 18, 2023 (edited) im at the point where idk if my tuner is losing it and hes making me think im crazy....the base map he sent me turns the car on, sometimes it takes long... the new one doesnt let me turn th car on at all, he says its cause the link isnt reading fuel pressue 4 minutes ago, Adamw said: The fuel press sensor isnt going to prevent the the car turning on or running. Edited December 18, 2023 by Robsevo9 correction Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 18, 2023 Author Report Share Posted December 18, 2023 (edited) Adam are the signal wires supposed to have any power? So ground,5v and signal. When on a tester will the signal light up? The 5v does Edited December 18, 2023 by Robsevo9 Quote Link to comment Share on other sites More sharing options...
koracing Posted December 18, 2023 Report Share Posted December 18, 2023 If the voltage is 1.06 - that doesn't seem like a dead sensor. Does the voltage change on that screen if you unplug and plug the sensor back in? Does it change if you turn on and off the fuel pump output? If you can attach a copy of your tune file that may help to figure out why it isn't starting if it's related to the fuel pressure. Is there a mechanical pressure gauge on the car? What does it show doing the fuel pump on/off test? What exact sensor are you using as there are some sensors using the same connector with a different pinout. Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 18, 2023 Author Report Share Posted December 18, 2023 2 hours ago, koracing said: If the voltage is 1.06 - that doesn't seem like a dead sensor. Does the voltage change on that screen if you unplug and plug the sensor back in? Does it change if you turn on and off the fuel pump output? If you can attach a copy of your tune file that may help to figure out why it isn't starting if it's related to the fuel pressure. Is there a mechanical pressure gauge on the car? What does it show doing the fuel pump on/off test? What exact sensor are you using as there are some sensors using the same connector with a different pinout. Hey, the fuel pump and gauge all show and act normal. It’s just that one sensor I have connected on the rail. Tuner says it’s not allowing the car to stay on. So he turned it off and the car is now on. It just sounds crazy. I’m going to move it to an expansion wire anvolt11 and see what happens Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 19, 2023 Author Report Share Posted December 19, 2023 I’m using a aem pressure sensor on the fuel rail….. I wired it to the link expansion harness and it’s reading the same dam thing! And I tried a different sensor and it’s the same! Am I missing something? Does my tuner know what he’s taking about? I tried uploading the files but it says there’s no space and I don’t know how to do it another way Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 19, 2023 Author Report Share Posted December 19, 2023 Now the aem instructions are, Signal ground: tap to sensor/signal ground on ems or aq1, does anyone know if a chassis ground is ok? Or does this have to be a ground on the link? Quote Link to comment Share on other sites More sharing options...
castillaricardo Posted December 20, 2023 Report Share Posted December 20, 2023 You should use the signal ground from the ECU, not chasis ground. Same for the 5v pin, use the ECUs 5v pin. Using chasis ground would cause a ground offset and inaccurate readings. Can you post a link to the instructions for someone to double check? You can upload your tune to a file sharing site and post a sharing link here. Make sure the permissions are public. Robsevo9 1 Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 20, 2023 Author Report Share Posted December 20, 2023 https://www.dropbox.com/scl/fi/up3wv93irwv4ucpno8ux9/PC-Datalog-2023-12-20-4-19-42-pm.llgx?rlkey=wc3mgikqusabioiye6zbmo5k7&dl=0 does this work? Todays log, signal to pin 61, ground and 5v going to link ecu expansion harness 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 20, 2023 Report Share Posted December 20, 2023 The link to the log works. What is this log meant to be showing? The fuel pressure sensor is not working correctly in that log but the engine is running, I thought the claim was the engine wouldnt run when the fuel press sensor was assigned? I guess that could be the case if they mean when they change the fuel system type to FP sensor which would upset things since the sensor is reading no pressure. You have a constant 0.59V showing on AN Volt 2. To get that voltage it would likely be the sensor pinned wrong. Is it definitely an AEM sensor? If you unplug the sensor does AN Volt 2 then show 0.00-0.02V in PC Link? With the sensor unplugged, if you short the 5V and signal pins together using a paperclip or similar like below, does AN Volt 2 then show 5.00V? Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 21, 2023 Author Report Share Posted December 21, 2023 2 hours ago, Adamw said: The link to the log works. What is this log meant to be showing? The fuel pressure sensor is not working correctly in that log but the engine is running, I thought the claim was the engine wouldnt run when the fuel press sensor was assigned? I guess that could be the case if they mean when they change the fuel system type to FP sensor which would upset things since the sensor is reading no pressure. You have a constant 0.59V showing on AN Volt 2. To get that voltage it would likely be the sensor pinned wrong. Is it definitely an AEM sensor? If you unplug the sensor does AN Volt 2 then show 0.00-0.02V in PC Link? With the sensor unplugged, if you short the 5V and signal pins together using a paperclip or similar like below, does AN Volt 2 then show 5.00V? Yes aem stainless 100psi, only a few months old. This is what the tuner wrote. I will test for that. Also that is how I have it pinned. https://www.dropbox.com/scl/fi/jmayfl78nthv71wggyisi/email1?rlkey=92siszpzq585devg419zgqw4d&dl=0 https://www.dropbox.com/scl/fi/62wss0vrxvcscpmxz9rem/email2?rlkey=em5n0zhlbrjrsdhsg4tyht7rk&dl= i followed these instructions https://www.dropbox.com/scl/fi/qpt0xohcdmyakttbkthhh/aem?rlkey=8cfr8c1kbe0j0bsolkagk8y4e&dl=0 Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 21, 2023 Author Report Share Posted December 21, 2023 Adam just checked, when I unplug it link shows 0.02v, when I jump it link shows 5.00v and fault code comes up. Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 21, 2023 Report Share Posted December 21, 2023 That suggests the wiring is ok. How is the sensor attached to the rail or fuel line? Is it possible the port or flow path to the sensor is being blocked somehow when you thread the sensor all the way in? Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 21, 2023 Author Report Share Posted December 21, 2023 7 minutes ago, Adamw said: That suggests the wiring is ok. How is the sensor attached to the rail or fuel line? Is it possible the port or flow path to the sensor is being blocked somehow when you thread the sensor all the way in? It’s directly on the fuel rail. No thread sealant, and I checked inside the sensor and it’s clean. https://www.dropbox.com/scl/fi/1cfojgn64y5u527x5dyli/IMG_9508.PNG?rlkey=3pk4w7089osw3u1kff9b4sxa2&dl=0 it’s leaning back a bit not straight up 11 minutes ago, Adamw said: That suggests the wiring is ok. How is the sensor attached to the rail or fuel line? Is it possible the port or flow path to the sensor is being blocked somehow when you thread the sensor all the way in? Ohh I see what you mean..I will check for clearance, it did come with a spacer. I’ll report back tomorrow afternoon. Thank you for always being so helpful!!!! Quote Link to comment Share on other sites More sharing options...
koracing Posted December 21, 2023 Report Share Posted December 21, 2023 If you have an air compressor you can try testing the pressure sensor with compressed air also to see if the voltage changes in the ecu with that. I've only had 1 AEM stainless sensor failure in the past 10+ years of using them. Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 21, 2023 Author Report Share Posted December 21, 2023 54 minutes ago, koracing said: If you have an air compressor you can try testing the pressure sensor with compressed air also to see if the voltage changes in the ecu with that. I've only had 1 AEM stainless sensor failure in the past 10+ years of using them. When I get home I’ll try that, I’ll also see if there’s a clearance issue… is the sensor placement ok? It’s on the fuel rail before the injectors. Quote Link to comment Share on other sites More sharing options...
koracing Posted December 21, 2023 Report Share Posted December 21, 2023 2 hours ago, Robsevo9 said: When I get home I’ll try that, I’ll also see if there’s a clearance issue… is the sensor placement ok? It’s on the fuel rail before the injectors. Location should be no issue. I've done the same thing many times. I have my chassis dyno extra sensors (all the same AEM stainless sensors for 9+ years now) set up with these type of in-line port adapters for input to the dyno analog inputs for those (many) vehicles that don't come equipped with their own sensors. I use them to monitor differential fuel pressure (dyno software calculated difference of dyno MAP and FP sensors) most often, and sometimes oil pressure. Quote Link to comment Share on other sites More sharing options...
Robsevo9 Posted December 21, 2023 Author Report Share Posted December 21, 2023 1 hour ago, koracing said: Location should be no issue. I've done the same thing many times. I have my chassis dyno extra sensors (all the same AEM stainless sensors for 9+ years now) set up with these type of in-line port adapters for input to the dyno analog inputs for those (many) vehicles that don't come equipped with their own sensors. I use them to monitor differential fuel pressure (dyno software calculated difference of dyno MAP and FP sensors) most often, and sometimes oil pressure. 19 hours ago, Adamw said: That suggests the wiring is ok. How is the sensor attached to the rail or fuel line? Is it possible the port or flow path to the sensor is being blocked somehow when you thread the sensor all the way in? Ok so I tried blowing air into the sensor with a blow gun that has a rubber tip and it didn’t move at all I checked for psi and nothing went up or down volt was the same also it didn’t move. https://www.dropbox.com/scl/fi/785q8duh3xshpmsvfty14/IMG_9514.JPG?rlkey=ucic0lxg1rrjpay1lo4stokz6&dl=0 kpa stood the same. I think the sensor pressure mechanism is messed up. Quote Link to comment Share on other sites More sharing options...
koracing Posted December 21, 2023 Report Share Posted December 21, 2023 Do you have the AEM sensors working anywhere else on the car? It seems like it's pinned ground and signal backward or something? Quote Link to comment Share on other sites More sharing options...
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