kevinlee Posted October 22, 2023 Report Share Posted October 22, 2023 hey im working on a 4age 20v blacktop in an ae86, running link atomx ecu. motor is stock aside from air filter, exhaust and 1zz coil on plugs the issue im having is while trying to get the tach to read, i had it working with this same ecu and the 16v engine but for some reason the output voltage to the coil on plugs is .15-.20 volts, the tach has a 22k resistor. also i cant get the can lambda to read afrs properly, it just shows 0.00 in red 10-22-2023 map.pclx PC Datalog - 2023-10-22.llgx Trigger Scope - 2023-10-22.llgx Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 22, 2023 Report Share Posted October 22, 2023 Trigger Scope looks good. How did you connect the tach? As far as I can see, all your aux outputs have been used and there's no output assigned for tach. For CAN Lambda, you'd need to check the wirings, but it seems that the logged errors indicate a bad sensor. Quote Link to comment Share on other sites More sharing options...
kevinlee Posted October 23, 2023 Author Report Share Posted October 23, 2023 im using an mrp patch harness and they left a wire from coil 1 i believed for the tach but it only puts out .15v , that might be the reason for no tach, as for a bad sensor ive tried a couple different ones to no avail Quote Link to comment Share on other sites More sharing options...
kevinlee Posted October 23, 2023 Author Report Share Posted October 23, 2023 2 hours ago, essb00 said: Trigger Scope looks good. How did you connect the tach? As far as I can see, all your aux outputs have been used and there's no output assigned for tach. For CAN Lambda, you'd need to check the wirings, but it seems that the logged errors indicate a bad sensor. ok so the o2 sensor was bad, thank you. one that i was trying to use was brand new, so now the afrs are working properly. as for the tach im sure i wont be able to piggyback off the coil trigger. not sure why its labeled as a spare when its being used . is there a way to get it to work? where did you find the logged errors? Quote Link to comment Share on other sites More sharing options...
essb00 Posted October 23, 2023 Report Share Posted October 23, 2023 You can make a time plot and parameter list. You can see the lambda status as you move the time plot slider (like below). *Check the fault code descriptions in the help file. You may be able to get around it by changing your COPs to wasted spark instead to free up two ignition channels and use them for VVT and fuel pump. You need to use a dedicated aux output channel for tach signal. Which pin on the 34-pin connector is that spare connected to? Quote Link to comment Share on other sites More sharing options...
kevinlee Posted October 24, 2023 Author Report Share Posted October 24, 2023 On 10/23/2023 at 1:42 AM, essb00 said: You can make a time plot and parameter list. You can see the lambda status as you move the time plot slider (like below). *Check the fault code descriptions in the help file. You may be able to get around it by changing your COPs to wasted spark instead to free up two ignition channels and use them for VVT and fuel pump. You need to use a dedicated aux output channel for tach signal. Which pin on the 34-pin connector is that spare connected to? I'll have to look for that next time. The spare wire is connected to ign 1. Not sure why mrp put it there Quote Link to comment Share on other sites More sharing options...
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