Kzn130 cranks but won’t fire. Losing my mind over it

[93hiluxsurfer]

Hi all, I’m hoping someone more savvy can help me figure out what’s going on with my rig. It was running great after I replaced the injectors and did some maintenance. Then one day after work I parked it (no issues) then went to fire it up in the morning but it just cranked and wouldn’t fire.

I checked all the fuses and relays that I could find, including under the glove box. Everything seems fine. Applied 12v to the spill control valve and it was clicking. Can’t find the scv relay that is referred to.

Cracked the injector line and fuel sprayed as I cranked. So fuel is getting to the engine it seems. It has to be a sensor or something preventing ignition. I hope it’s not the ECU. Opened it and didn’t see anything obvious.

I ran a dtc and it pulled up a dtc code of 63 which I believe is the sensor 1 and 2 circuit but I don’t know what that is referring to. Working with a 1999 Kzte manual so not everything is exact so I’m hoping some of y’all may have a better idea on what’s going on. Thanks in advance.

[NiftyNev]

No answer for you at this time but do not connect SCV to battery voltage.

[NiftyNev]

Check resistance of the SCV. Should be between 1.4 and 2 ohms.

[93hiluxsurfer]

Thank you, I’ll check the resistance. I talked to a shop and the guy said that the Dtc code 63 is for the no 2 solenoid in the shifter assembly. He said that a fault code from the transmission would prevent the rig from starting but I don’t believe that completely. I hope so, have a replacement solenoid delivering today. But I imagine there is more at play. I found a new ECU from Japan but it’s 900 dollars so I’m hoping the ecu won’t need replacing.

[93hiluxsurfer]

Resistance of the scv connector leading to the scv is within spec. Bounces between 1.9 and 2.1 ohms. At the other end of the harness, it reads between 6 and 7 ohms. I’m going to check my VSV since they could be choking the engine of air if faulty.

[93hiluxsurfer]

I’m beginning to suspect it’s the VSV. The valves themselves work when 12v is applied but one of the harnesses read nearly 700 ohms when touching probes to the soldered connector terminal point. (Both of my harness connectors wires severed right at the connector so I had to cut into the plastic and solder the leads back on, worked for a couple weeks but maybe it shorted.) I ordered replacement harness connectors. Still waiting for the shifter solenoid to deliver.

Another recent symptom, prior to it not starting, that may be worth mentioning, is that the engine would continue running and dash lights would stay on even when I turned the ignition off and pulled the key. Additionally, the dash light would flash BRAKE intermittently without the parking brake applied. So many variables. If this doesn’t work i may bite the bullet and order a new ecu.