HLinek Posted January 29 Report Share Posted January 29 Hi, First post on here. I'm struggling to get my engine started, and I could use a second set of eyes on this. Here is some info about the build. (Pictures on my instagram if you're curious. https://www.instagram.com/hansonlinek/ ) SR20VE+t with GT2871R turbo, I built the wiring harness, Link g4x Fury X ECU, Aim PDM32 PDM, audi coilpacks, ID1050X injectors, antigravity atx20rs battery, MSEL battery isolator, radium fuel cell with FCST. Sensors: Taarks crank and cam trigger kits, bosch oem nissan ect, bosch knock sensor, racegrade remote mounted 0-60 psia map, racegrade remote mounted 0-100psig Fuel pressure, bosch combo oil pressure/temp sensor, racegrade open element air temp sensor, RRR engine coolant pressure sensor. When I first made my coil pack harness I ran the small gauge ground back to where the ECU grounds instead of to the cylinder head. I'm not sure if this is a problem, my thought is that it may be contributing some electrical noise. I can remake the harness or maybe move to the bosch motorsports coils if needed. When I try to start it I'm getting mostly some sputtering and backfiring sometimes. I set the base timing during cranking only with a timing light and a spark plug lead extender on cylinder 1. It seemed to be stable on -10 degrees to match the setting on the ecu. The trigger scope I tried to make didn't seem to work so I have a screenshot as well. I feel like I might be missing something, I based my map off of one of the SR20 standalone maps and changed things to suit my setup. I haven't made any logs yet, if that would help I'll work on that. Thanks, Hanson Trigger Scope - 2024-01-28 4;10;45 pm.llgx SR240Z.pclx Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 29 Report Share Posted January 29 12 minutes ago, HLinek said: When I try to start it I'm getting mostly some sputtering and backfiring sometimes. I set the base timing during cranking only with a timing light and a spark plug lead extender on cylinder 1. It seemed to be stable on -10 degrees to match the setting on the ecu. The trigger scope I tried to make didn't seem to work so I have a screenshot as well. have you tried adjusting your trigger offset by 360deg? Other than that will need a PC Log of a start attempt Actually your fuel table is setup to suit a traditional fuel tune rather than a modelled, you're going to want something more like 60 at idle in the fuel table, maybe look through the sample maps in PCLink for one setup as modelled to use as an example or I have attached a basic modelled fuel table from a GT86 here that you can import into your tune. GT86 Fuel Table.lte Quote Link to comment Share on other sites More sharing options...
HLinek Posted January 29 Author Report Share Posted January 29 Thanks I'll check it at 360 degrees off. PC Datalog - 2024-01-28 6;01;08 pm.llgx Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 29 Report Share Posted January 29 All the triggers are happy, dwell value is changing and engine cycle count is increasing. It will need more fuel (Fuel table values) and try adjusting the trigger offset by 360 if it doesn't start after adding more fuel. Quote Link to comment Share on other sites More sharing options...
HLinek Posted January 29 Author Report Share Posted January 29 My guess is the dwell value is changing due to the voltage of the battery dropping so quickly. Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 29 Report Share Posted January 29 Dwell value changing means it is being updated which means it is trying to run the engine. The value will always move around as it is measured dwell not requested dwell and so is affected by changes in engine speed throughout each rotation. Quote Link to comment Share on other sites More sharing options...
HLinek Posted January 29 Author Report Share Posted January 29 It started up with your fuel table! Then the revs kept rising so I panicked and shut it off lol! Vaughan 1 Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 29 Report Share Posted January 29 That'll be your idle control stuff, you have it set to use the E-Throttle for idle control but the values in your Idle Base Position look like values pulled from an idle solenoid style tune as they are between 56% and 35%. You're going to want values more like 5-3% so maybe divide your whole idle base position table by 10. Do also note the fuel table I gave you is from a naturally aspirated engine so you will want to add more rows for pressures above atmospheric before you start tuning it properly. Quote Link to comment Share on other sites More sharing options...
HLinek Posted January 29 Author Report Share Posted January 29 Thank you that worked! Awesome! PC Datalog - 2024-01-28 6;26;28 pm.llgx Vaughan 1 Quote Link to comment Share on other sites More sharing options...
Vaughan Posted January 29 Report Share Posted January 29 Next thing to fix will be E-Throttle target table, the far left column looks good but everything above 500rpm is always a 0% target, so either remove the engine speed axis or copy the first column's values into the rest of them. Quote Link to comment Share on other sites More sharing options...
HLinek Posted January 29 Author Report Share Posted January 29 Yep, I just had realized why the throttle wasn't working. Vaughan 1 Quote Link to comment Share on other sites More sharing options...
HLinek Posted February 4 Author Report Share Posted February 4 I realized I had the o2 sensor wired without the pin 4 switched 12v power wire. I've since added it in but I'm still getting a reading of 0 on the afr. Is there a setting that I have wrong or should I try again with a new sensor if the current one is damaged maybe from not having a working heater? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 4 Report Share Posted February 4 What does Lambda 1 status and Lambda 1 error show after start-up? Quote Link to comment Share on other sites More sharing options...
HLinek Posted February 5 Author Report Share Posted February 5 It started working after leaving the car on for longer, just needed time to heat up. Quote Link to comment Share on other sites More sharing options...
HLinek Posted February 16 Author Report Share Posted February 16 Vaughn, For the fuel table you gave me should I be changing the axis to Map? Quote Link to comment Share on other sites More sharing options...
Vaughan Posted February 18 Report Share Posted February 18 On 2/17/2024 at 3:23 AM, HLinek said: For the fuel table you gave me should I be changing the axis to Map? Either MAP or MGP will work, there is some specific reason for using one over the other to do with altitude changes but I can't remember the reasoning off the top of my head. Quote Link to comment Share on other sites More sharing options...
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