2jz supra no start link g4 fury

[TSP]

Hello, having issues with a supra not starting, fresh build.

fitted with a link g4 fury, Factory trigger, r35 coils. 

Attached is the base map currently in the vehicle and trigger log. 

attached is trigger scope and pcl file. 

have decreased trigger arming voltages without success. 

spark is weak when cranking, perfect when coil testing. 

Good fuel pressure 3 bar, and injectors working. 

Confirmed engine timing, compression etc. 

 

 

Trigger Scope Log 2023-07-2 5;50;50 pm.llg supra.pclr

[Adamw]

The trigger looks ok I think, the cam sensor voltage is a bit on the low side but it should just scrape through.  

The fuel density setting is 1/10 what it should be so you will be getting 10X more fuel than you should so it may be flooded.  Change the density to about 0.745.

 

13 hours ago, TSP said:

Good fuel pressure 3 bar

If you are getting that from the ECU it would pay to look at that again, the fuel pressure sensor on AN Volt 4 has a calibration table setup for a lambda controller.  The Oil pressure sensor calibration is wrong also, but this wont prevent it from starting.

The TPS and IAT are both in fault condition when you saved your map.  If it doesnt have an IAT sensor then turn it off or set the error value to 20°C so it doesnt affect the fuel calc.  TPS needs to be connected and working for idle lockouts and accel enrichment.

Change the injector drive settings to saturated or input the correct currents if they are in fact low impedance.

 

The numbers in the fuel table are not really suitable for modelled fuel equation, probably close enough to start, but you would probably have a better starting point if you import the fuel table out of the Monsoon basemap.  

A couple of other suggestions not related to the no-start condition:

The ignition dwell table looks a bit extreme for r35 coils, I would start by halving those values.

>Fuel corrections>IAT trim should be turned off for modelled fuel equation as it uses the approximated charge temp to calculate density/mass.  

 

If still no go with those changes, please give us a log of it cranking.

 

[TSP]

@Adamw Made some changes as requested with no luck, 

Removed fuel pressure and oil pressure inputs, confirmed fuel pressure with mechanical gauge. 

Fitted new spark plugs - bcpr7es . 

Confirmed timing with light, all ok. 

Attached is log file during cranking, and modified PCL . 

 

supra crank no start pcl.pclr supra crank no start.llg

[Adamw]

All looks ok in the log, the ecu is showing realistic RPM, stable dwell and inj PW and no cuts etc so there should be some signs of life.  

Oddly there is absolutely no manifold vacuum generated when cranking, not even the slightest flinch off atmosphere.  MAP sensor hose off maybe?  Or cam timing out maybe?  

I would pull a plug out to confirm there is a spark when cranking, if that looks ok then try a squirt of starter fluid to confirm there is fuel.  If no signs of life with that then compression test.