S1 rb25/s14 starting problem

[25zenki]

Hello all, currently finishing up a rb25 swap into my s14. Having issues with starting, car has spark (confirmed by pulling a plug and watching it spark), has fuel(confirmed by checking pulse/voltage at injectors all spark plugs are soaked in fuel). Car cranks over and pops into the exhaust with a heavy fuel smell but no attempt to start or run, I have torn the timing cover off and triple confirmed timing, turned the CAS in multiple spots both directions, attempted to start with coolant temp and maf unplugged, checked my fuel lines and made sure they weren’t backwards, checked voltage at cas/injectors/coilpacks, made sure all the grounds in the harness are connected and added a few grounding straps (1 from chassis to block, 1 from chassis to head, and 1 from chassis to igniter chip) I am getting stumped here. As a last ditch effort I made a full grounding harness tonight that’s going to run from the battery and add an extra ground from the battery onto the coil pack harness/igniter chip/ intake manifold/ Wiring specialties harness ground/ and alternator. I’m hoping maybe the grounding harness will fix it here but posting here to see if anyone has any other ideas on what else I can check. My fuel pressure is unknown right gauge will be here tomorrow. 

[25zenki]

Car is on factory injectors/z32 maf/ q45 throttle body/ z32 ecu with nistune 

[Dose Pipe Sutututu]

When you crank your car, and hit it with a timing light, can you see a steady crank timing?

[25zenki]

1 hour ago, Dose Pipe Sutututu said:

When you crank your car, and hit it with a timing light, can you see a steady crank timing?

I’m here solo don’t have any hands to help so haven’t hit it with a timing light 

[Dose Pipe Sutututu]

try use your phone to record it?

might be an issue with the shutter speed / refresh vs. the timing light, but worth a shot

[MBS206]

4 hours ago, 25zenki said:

I’m here solo don’t have any hands to help so haven’t hit it with a timing light 

Make up a wire you can energize the starter solenoid from when in the engine bay.

Then energize it with the key in the "On" position, and use your timing light.

[MBS206]

Also, have you confirmed the harmonic balancers timing mark is correct?

Put it to TDC and then check the cylinder is actually at TDC. The balancer looks old as, and may have started to let go.

 

How old are the plugs in it?

What spark plugs are in it, and what gap are they at?

[25zenki]

2 hours ago, MBS206 said:

Also, have you confirmed the harmonic balancers timing mark is correct?

Put it to TDC and then check the cylinder is actually at TDC. The balancer looks old as, and may have started to let go.

 

How old are the plugs in it?

What spark plugs are in it, and what gap are they at?

I confirmed cylinder is TDC. harmonic balanced is old but rubber looks good. Night before last I took the balancer off and used the crank mark to confirm timing. Plugs are brand new bkr6e at 1.1ish 

[MBS206]

If you've got spark, and you've got fuel, it needs once last thing to go vroom...

Have you compression checked the motor?

[25zenki]

1 hour ago, MBS206 said:

If you've got spark, and you've got fuel, it needs once last thing to go vroom...

Have you compression checked the motor?

140-150 across the board. At this point hoping the grounding harness fixes it. My grounds are all tied to the chassis and none to the battery. For SR and KA that’s never been a problem for me but had a few other guys here and Reddit who told me RB really like a very solid ground setup tied to the battery so going to try that next, I’m stumped if that doesn’t do it. Never had a car have spark and fuel and not fire off before. Only thing I can think is the spark is intermittent/weak because of grounds nothing else really makes sense at this point 

[Murray_Calavera]

20 hours ago, 25zenki said:

z32 ecu with nistune 

Are you 100% sure this isn't tune related?

[25zenki]

2 hours ago, Murray_Calavera said:

Are you 100% sure this isn't tune related?

Honestly no not at all, but it’s a very basic tune, it’s stock injectors q45 tps and z32 maf. Other than that it’s a completely stock base map. The file is from nistune and from my understanding if it was tune related I would be able to unplug maf and tps and it would still start even if it was a really shitty start. I have tried starting it with coolant temp, maf, and tps unplugged none of those 3 togethor or individually changes anything 

[25zenki]

2 hours ago, Murray_Calavera said:

Are you 100% sure this isn't tune related?

Maf is a question mark but TPS  I have set at 0.47, the fact that I’m getting proper voltage range out of it with the key on leads me to believe it’s functioning properly. I’m getting proper voltages on basically everything. I still need to look up voltage ranges for z32 maf and test that 

[MBS206]

Have you tried to start it with AFM unplugged? From memory with TPS closed and AFM unplugged an RB25 will start and idle (won't rev).

This will tell you it's either AFM, AFM wiring, or tune.

You also said Z32 ECU with Nistune? 

Have you made all the necessary changes like the change of the ABS input on the pin the Z32 uses for TPS closed?

Was the Z32 specifically setup for RB25 S1 or S2 from R33? There are differences between that need mods done on Z32 ECU.

What's the part number on your Z32 ECU?