Nostalgic R31

It revs very easily. No hesitating or backfiring or anything. Revs as easy as most other rb's I've had. Only thing is when you rev it and hold at a specific rpm it still has the miss as it does at idle (just faster of course) Re done the wiring today and I've got the same result as before. I have tried a few tps just to make sure it's not that. It originally had a s1 tps, which we swapped for a s2 at the tuner and I've since replaced that tps with another s2. The only other thing I can think of now is the valves. Highly unlikely but would this be happening if say because the place that re-cond the head didn't adjust the valves properly on cylinders 1 and 6 making them too tight or something? Resulting in them not fully closing? I don't know. Might try another cas. This would be my 4th

It has been tuned for the injectors, but I did the coil conversion afterwards, as I thought the old coils might of been the issue. I ran it today on a stock ecu to see what would happen and it ran exactly the same too Might re do the wiring for the 3rd time and see if that helps

I'm in perth. The only place I have called who said they will touch it is PZP in Wangara. Every other place pretty much said "Z32 ecu on a RB30 with E85? Come back with a Power FC" I have gone through 3 sets of plugs hoping that was the issue. But made no difference. I've also gapped the plugs at different levels to see if that helped. I tried a noid light and spark tester to see if the coil and injector were firing together. Now I can obviously only test one cylinder at a time but it looked like the injector and coil are firing when they should. Double checked mechanical timing. It's spot on. Tried adjusting the cas to see if ignition timing was off, and it made no difference. I performed countless compression tests, while the readings are low, they are all within 5 psi of each other. The injectors are 1600cc top feeds. And I haven't tried new clips, but the noid light shows it working, and also if I put a spare injector on the clip I can feel it clicking in my hand when it should be firing. I have narrowed it down to cylinder 1 and 6 that are not working. I can take the plugs off both this injecotors while running and it makes no difference. This really has me confused Cheers guys for the help so far though!

I'm in perth. The only place I have called who said they will touch it is PZP in Wangara. Every other place pretty much said "Z32 ecu on a RB30 with E85? Come back with a Power FC" I have gone through 3 sets of plugs hoping that was the issue. But made no difference. I've also gapped the plugs at different levels to see if that helped. I tried a noid light and spark tester to see if the coil and injector were firing together. Now I can obviously only test one cylinder at a time but it looked like the injector and coil are firing when they should. Double checked mechanical timing. It's spot on. Tried adjusting the cas to see if ignition timing was off, and it made no difference. I performed countless compression tests, while the readings are low, they are all within 5 psi of each other. The injectors are 1600cc top feeds. And I haven't tried new clips, but the noid light shows it working, and also if I put a spare injector on the clip I can feel it clicking in my hand when it should be firing. I have narrowed it down to cylinder 1 and 6 that are not working. I can take the plugs off both this injecotors while running and it makes no difference. This really has me confused Cheers guys for the help so far though!

I have swapped over to another set if injectors, so I hope I'm not that unlucky of having 2 bad injectors haha It is running insanely rich. You can see fuel spitting out the exhaust. No, I don't have access to a leak down tester. Cheers Ben, I'll double check the timing and make sure it's all good

I have unplugged the coils and injectors while the car is running. Cylinder one make no difference when unplugged, but all the rest do. Took out the coil and injector from cylinder one and swapped them to cylinder 2. Still missing cylinder one. Now here's where it gets weird. Take injector out of rail and then manually turn cas by hand, and she fires. Take out coil and spin cas, it also fires. Test all plugs with multimeter and it has all the right values. So, why no cylinder one? Compression test is super low. 100psi exact on all 6

Hey guys I've finally dropped my rb30det into my r31. Engine is a bog stock rb30 bottom end with a recon rb25 head with vct welded up. Engine was dropped into the car with a to4z, 1600cc injectors, Freddy plenum and Nistjne running E85. Now the car starts and runs. Started almost straight away when I fired it up and idled there. It idles very lumpy and rough. I put this down to the old tune on the nistune I have since taken the car to the tuner, who put a base tune on it but couldn't go any further because it revs very rough. Like a constant misfire. So. I've changed the throttle body, replaced injectors, changed from stock coils to ls2 coils, changed afm (z32 to r35) made a new coil pack harness and made a new injector harness to try and fix the issue but no luck. Now I'm here left scratching my head wondering why this thing just doesn't want to run properly? It has fuel on all 6, and it also has spark. Makes no sense as to why it's misfiring? The engine wants to run, but just seems like one cylinder doesn't want to play. It starts with a little help of the accelerator, then idles away very rough, then if you rev it it'll roughly rev up. But it doesn't hesitate or cough or splutter. Just very rough. I'm hoping someone out there with more knowledge then my would be able to help me with this very frustrating issue Cheers guys