Crans

Well it was running pretty rich when it started last night. Is sandpaper ok to cheak plugs?

There was already a mark on it so originally we lined it up to that and it started(This was the other night) As it was hard to start that time i have been moving the CAS slightly starting from all the way anticlockwise. The issue this morning happened before the case was moved as i though it might have been an issue. Just noticed the lack of fuel pump priming so i might disconnect the fuel feed and see if fuel is flowing I recently had the fuel pump hard wired with a relay by an auto electrician

Spent a day at my mates house trying to figure out why my car missfired at low rpm and went lean all the time. Swapped out a heap of parts including the CAS, ended up putting all my parts back on apart from the CAS. Drive home no problems.(Apart from the miss and random lean out) Next day i figure out my cam cover venting to atmosphere with the pcv still connected to the plenum is basically a big air leak. Start the car and missfire is gone no more leaning at idle I go for a quick drive and all smooth apart from burbling on decel, i assume this is caused by incorrect injector lag times(Lag time may have been incorrectly set to high as the air leak meant more fuel was needed on vacume). Come to a round about near my house and the car dies. Will not start just keeps crancking over. Tow the car home. This weekend i put my CAS back on and jump start the car and it runs(Took abit of cranking) Battery was pretty much flat from all the cranking so last night i put the battery on charge. This morning I try and start the car and nothing just endless cranking(I thought the CAS i put on it was faulty) Any ideas? I have already reset the tune to standard and resized the injectors and MAF to get a new starting point. This did not help at all. CAS timing has not been set properly since putting mine back on and is currently sitting all the way anti clock wise. I have played with cold cranking fuel and ignition and this has not helped. I do plan on setting the timing correctly but i need the F*cking car to start first.

Ive got a nistune rb20 ecu running my rb25 i have adjusted this table as my car was too retarded on warmup While logging i saw the reported timing value matched this table

RB20 ECU will hard set timing during warm up

Stao you should offer a complete fitting kit, inlcuding intake pipe and joiners from the turbo outlet to ic piping. Ive seen questions regarding this all through this thread. It's more income for you and convenience for your customers. Just a thought i think i paid $500 all up for this to be done on mine would have gladly given this money to you.

Do you have your PCV connected to the Plenum? Make sure that valve is still working If it is still connected do your cam cover breathers still connect to the intake pipe after your AFM?

Machined properly with a gasket bolted on properly I doubt it would leak

What about drilling a hold in the manifold machining a flat surface. tapping 2 holes and use the bolt on flange for the wastegate. no welding required.

You never mentioned the ECU being tuned. Does this price maybe include a Nistune board and z32/r32 ecu?

pics of setup please

can you log boost from the plenum and then from the hot side of the inter cooler. You can then see if your cooler is a restriction or if you have an air leak

Did adding boost add power? Or did it keep falling over?

What I meant was I'm pretty sure the chip used is the same between the gtst and gtr meaning the gtr will be batch fired aswell

Id like to know if the gtr is sequential as they are running an 8 bit cpu like the rb20(At least the r32gtr is)

Agreed totally with this, I will be attempting this on the weekend, just need to acquire the tools or some one with the tools to do this.

Amount of fuel to flow out of the injector is dependant on the opening time(For this purpose we will ignore injector lag times) and fuel pressure. The more fuel pressure the more fuel will flow at the same opening time(This is also discounting changes in manifold pressure) If you have a faulty FPR it could make the fuelling go all over the place. That said if injectors are not getting a constant good voltage source, injector opening times will change, this will change the amount of fuel being injected but wont nessesarly change the pulsewidth's especially if the ECU is not seeing the same voltage drop

I have basically swapped out everything apart from ECU and FPR. I'll borrow my mates occeloscope to check injector voltage. I suspect my issue is electrical, also suspec OPer's issue is electrical aswell. I took my car to an auto electrician to be told nothing is wrong. I see an alternator putting out 13v and the ecu seeing 10.5v as a problem New alternator has mostly resolved my voltage issue tho, but still seeing all these weird problems. I will be putting in a PFC and Sard FPR as testers ASAP

Lean on the wideband as well having a rough idle and miss fires(Then again it miss fires idling at stoich)

Can you provide more details on the ecu relay? I'm having similar issues on my 33 gtst random leans outs and miss firing at idle. during the lean out i am not seeing a change in injector duty cycle

Not enough output ports is probably the correct answer.

Funny enough I'm a programmer aswell yeah there wouldn't be a heap of extra code there is a bit of room available then again I've never worked on these chips they are probably faster than I give them credit for

Not enough memory I guess the extra timing calculations would require alot more code CPU used has limited outputs

At best it would be wasted spark no way 1 coil could handle more that 1 spark plug they struggle as it is with the one

Therre was a ca/sr ecu that changed between sequential and batch, but considering the rb20 ecu only has 2 injector drivers it is batch only. No sure about ignition tho.