Hello!

I just wondering why the P0300(Random Misfire) code appear when you have the Greddy TT install... some here mention that is normal but if someone can explain with more details that will be great... and also, that code appear on idle rigth, there is not misfire when the car is W.O.T. Rigth???


Thanks in advance!

 

If the car is running too rich the computer sees it as a misfire and an ignition problem and puts up the code.

 

So if that is the situation, is have to be corrected with the TS reflash or not? I have the Greddy Reflash of TS, do you believe that TS can resolve this issue?

btw the car on idle is running 14 (like stock) and on full boost is running around 10.9 on A/F mix.


Thanks!

 

Even an N/A car will throw that code with cat pipes....so I wouldn't worry about it too much. Your A/F ratios sound right on the money.

 

I think greddy kit tends to sputter a little fuel at idle or cruise with the big 440cc injectors. That is probably contributing to an occasional misfire. I wouldn't worry too much at all about this.

Have you changed plugs to one step colder? With this setup, you should be changing your plugs every 6000miles or so. I know it seems like a lot, but the cars are running quite rich under boost, and the plugs tend to foul pretty quickly.

I am also begining to think that the problem with scatter ignition timing and the unshielded crank angle sensor, may be contributing to the random misfires.

 

I know exactly what u mean. I got that code all the time. My installer told me that it can possibly be that the emanage doesnt catch up with the ecu when it starts to fire. So what he adviced me to do is that everytime u start ur car turn the key to the on position for like 4 seconds(when all the lights on the dash board are on) then start the car. I have been using this method for over a month now and the code hasnt come on anymore. Try it. Just clear the code first and use this method.

 

Yeah I have Denso IKH22 (2 step colder) but that theory about the crank angle sensor sounds interesting.

 

Sound interesting but I have Technosquare Reflash, I don't have the e-manage install... but I try it anyway

 

My my testing, I found that 2 steps colder Iridums were too cold for even aggresive street driving. My plugs were carboned up to hell. So I swtiched to 1 step colder. No misfires yet. Might be worth a try on the next round of plug changing.

 

Guys, I was just reading the factory service manual.

It states that the sensor that is referenced when a "random misfire" occurs.....is.......

You guessed it....the dread crank angle sensor! This lends even more support to the theory that crank angle sensoe interference could be causing misfires, and under worst cases situations, the destruction of motors.

The conspiracy theories continue.

 

Thanks! that's good to know... when are gonna be ready the wires crank sensor that phunk are building?

Thanks again!

 

Still now firm ETA.....Phunk has ben giving us frequent updates. As soon as the plugs arrive, it should only take a couple days to make all the wires for everyone.

We were targeting end of this month.

 

Im running the RC550 injectors . The car starts find most of the time . But every couple of days it sputters and chugs , till I give it gas and get it going . It throws a P300 code [ multipal miss fire ] right after that . I have the injectors scaled right....but wondering if its getting to much gas ? or my plugs are fouled from running to rich till I got them scaled right ? ANY one got an idea ?

 

I do this anyway just for peace of mind that oil pressure is up and turbos wont be dry at start up.

 

The oil pump doesnt operate until the engine turns, so leaving it in the on position doesnt increase oil flow. Or did I miss something here?

Booger, the eManage does a decent job of scalling the 550's and beyond..but not perfect. The only suggestion is to get an TS Reflash for the 380cc injectors, which will help the eManage scale them better. Essentially, it would be scalling from 380 to 550 instead of 280 to 550.

 

TS work with the 440 that bring the TT kit too

 

Booger, the eManage does a decent job of scalling the 550's and beyond..but not perfect. The only suggestion is to get an TS Reflash for the 380cc injectors, which will help the eManage scale them better. Essentially, it would be scalling from 380 to 550 instead of 280 to 550.




I dont use the Emanage , but I thought I would post the same problem that Im having with the Split Second Box . I think I may end up calling TS and see what they want for the 380 flash

 

You are right, I am a moron, it has been a long day. Late night last night and I have been installing my painted Brembo's today and fighting a leaky brake line so I had a brain fart.

 

But you bring up a good point. I lot of factory turbo cars have electric AUX oil pumps that continue to pump oil for 1 min after the engine shuts down. Wonder if something could be retrofitted to the 350Z? It would be a good precaution, and totally eliminate the need for a turbo timing.

 

I would prefer that over the timer, I hate leaving the 300ZX running with the timer, it is funny people look at me like I am idiot for leaving the car running.


How is this:

http://www.emp-corp.com/html/product...c_oil_pump.htm