Bank 2 is 14.3 and bank 1 is 10.6.

 

That's too vague for us. What load cell and rpm and where does it change, etc. Since a/f is constantly changing it's hard to pin it down with just one reading.

Unless you are saying it is pegged there continuously. That's a little more variance than mine. I see in my -18inhg area at low rpm sometimes a 10-15% difference but it's transient so no big deal.

 

Iam going to the shop tomorrow and give you an update about the rpm and a/f settings.

I know when I pulled the sparksplugs all 3 where wet. So 1 malfunctional injector that's not the case.

Thx all for thinking with me

 

Free reving the engine is not a good way to test for balanced AFRs. There is so little fuel being injected that lopsided AFR is not at all unexpected... Test it under load (on the dyno or on the road) and I'm sure the AFRs will be perfectly balanced.

 

ah, i was suggesting based on just bank a/f and didn't realize that all 3 plugs were wet.

1 stuck injector on my room mates turbocoupe caused 9:1 a/f but of course when we pulled plugs we easily found the culprit.

The upstream air leak explains a whole bank issue. if there is an air leak then the o2 corrections would be overcompensating thus pouring fuel into that bank to fix the fake lean condition.

 

Solved the problem changed the cam timing sensor and the O2. But now we have a P0300 error.

 

check to make sure all injector and coil wiring connectors are tight.

 

Ill do that. I have 6 spare coils I'll put them in and see. If that is not the problem I'll see if the voltage is oke. Can it be also the CPS?

 

Changes the sparks, coils and CPS to be sure that tats working fine. Still the nice 300 error misfire...... Started the engine toke the connector off an on the 1,3 and 5 almost no change in running.. 2, 4 and 6 direct rpm drop.

I have looked at the power to the coils all have 12v

Anny suggestions? Can it be an other sensor?

O2 and CPS are already changed on tha bank.

 

OKe. after changing everything including the wirering Harnas. I still have the P0300 code. Puting the engine piston 1 on DC taking a cam i found that cilinder 1 is closed at compresion and number 4 was open at the exhaust site... so it is a timing issue..

at installing i had the same issue as

https://my350z.com/forum/engine-and-...-question.html

look my setting below..













I turned the crank a little bit so the markings comes out ok it seems that i messed up there. I have to open the VQ and change the chain.

Do i have to turn the crank couter clock 1 teeth and don't let the marking match?

 

Verify the markings from the secondary timing chains are accurate with the timing marks. The markings of the secondary chains are not visible from front view so it is a little more difficult to verify in the picture.

Particularly pay attention to the bank that was having issues with AF ratios while running as that is your likely culprit here. It explains why only half the engine had AF issues, whereas the crank being off would have thrown the whole engine AF out of whack.

 

what tollbooth said, and why dont your secondary chains have colored markings on them? good luck

 

The secondary chains should have the color on the back side I believe

 

my secondarys had the color on the front side

 

Update.

Walked tru the timng. thats ok. so mgrotel the timing is ok.

looked at the nismo inlet cams and time points all ok.

flywheel timing compared to stock. same there.

after an other google sesion i found that the 03 Z/G can have a problem with the haltech firmeware later than V1.0

so i took out the haltech... started it. again the F# P0300......

The haltech back in the car.......... WTF..... It runs perfect....

turned the car off, waited 5 mins stated again.. No problems and no P0300 all cilinders running perfect.

I think it was somthing in the connector. but after 3 weeks of searching we can go on the the Next step....

the breakin on the dyno....

 

awesome! great news for the both of us! do you have a breakin tune for it?

 

First on vacum

 

then on boost! drool...

 

congrats on moving forward.

 

progress!!!! HUH ZAAA!!