I am so sorry, but please for the love of Z Gods, don't bash me for this. I didn't know the Z runs on 91, and I don't know how long it has been running on a lesser grade. I only been using lesser grade for about 4 months... How do I know if this particular "knock" is in the motor? I also read to help eradicate the problem is a ECU reset, new plugs, And proper octane.

 

Also, the car didn't come with a user manual, and it doesn't say in the gas cap what is used. I just happened to research and found out today.

 

ahhh lord...this is going to get ugly, but i have no help for you as i am no master mechanic best of luck, and by that i mean put on a flame suit lol

 

did you really think a Z would run regular?

you can find manuals online btw.. on this forum and others http://www.350zmotoring.com/forums/3...-pdf-form.html

 

Well help or no help, I just need to know how I will know if there is a knock, I just ordered 6 new iridium plugs. Just have to wait for them to get here to do the reset.

 

You will get an SES from knock sensors.

Just put in 91 and a fuel cleaner additive such as techron. As long as you werent beating on the car with 87 you should be fine. I throw 87 in for road trips from KS to TX. No hills that i even downshift, and my infiniti service manager said he does the same. I run techron through every 5k miles.

 

Suit?? I have a whole riot shield... I am getting used to people being retarded on here. I can take a beating until someone opens up and gives me the answer.

 

Nevermind, no I haven't got a Service light yet. So there is still hope for survival

 

youll be fine as stated unless you drove the poop out of it in the process.

 

Service Engine Soon aka Check Engine Light.

If you weren't beating on the car, you're fine. Just fill up with 91 ASAP to dillute whatever gas is left in the tank, and keep topping it off when it gets down to 3/4 tank to dilute it further. Your plugs are probably fine, but it wouldn't hurt to pull them and take a look. If they're not fouled, don't replace them.

The engine computer is smart enough to compensate for the lower octane fuel as long as you're gentle on the engine.

 

u guys dont be cheap and use 87, get whats meant to be run

 

The ECU will retard the timing because of the low octane, but please for the sake of the engine USE 91 OCTANE GAS ONLY! I don't care what people say about running 87 octane as long as you don't beat on it. Please, if you can't afford premium get a corolla. As for knocking, you will hear it.

 

Well I will def fill up with 91 for now on, and yes i am an idiot, new car, new horsepower, I def played with it for about a month, so hopefully no damage has been done, or too severe.

 

Will I need to do all this to reset the ecu? Or just the first operations procedures in bold? Cause I read somewhere about unpluging the negative for 10 minutes and depressing the brake 3 times, then hooking the cable back up and be good??

Operations Procedures

1. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2. Repeat the following steps (2a and 2b) procedures quickly five times within 5 seconds.
2a. Fully depress the accelerator pedal (HARD).
2b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the CEL starts blinking.
4. Fully release the accelerator pedal (while the CEL is still blinking)
5. Wait about 10 second.
6. Fully depress the accelerator pedal and keep it for more than 10 seconds.
7. Fully release the accelerator pedal (The CEL light will continue to blink).
8. Turn ignition switch to “OFF” position and now you can start the car. The CEL light should be gone.

Accelerator Pedal Release Position Learning

Operation Procedure
1. Make sure that the accelerator pedal is fully released.
2. Turn ignition switch “ON” and wait at least 2 seconds.
3. Turn ignition switch “OFF” wait at least 10 seconds.
4. Turn ignition switch “ON” and wait at least 2 seconds.
5. Turn ignition switch “OFF” wait at least 10 seconds.

Throttle Valve Closed Position Learning

Operation Procedures
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch is “ON”.
3. Turn ignition switch is “OFF” wait at least 10 seconds.
Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound.


Idle Air Volume Learning (Throttle Position Learning)
It is better to count the time accurately with a clock.

Operation Procedures
1. Perform “Accelerator Pedal Released Position Learning”.
2. Perform “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Conform that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
6. Repeat the following (steps 7a, 7b) procedures quickly five times within 5 seconds.
7a. Fully depress the accelerator pedal (HARD)
7b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the Check Engine Light (CEL) stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the CEL is ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications.

 

that sucks, we get 93 over here

 

This was also posted in the forums as well... does this work?

1. Ignition "ON", count to 3.
2. Depress/Release pedal 5 times...hard and fast.
3. Count to 10 (not 7!) and fully depress pedal
4. Count to 12 (SES should be blinking), release pedal
5. Count to 10, depress pedal
6. Count to 10, release pedal.
7. Turn off ignition, then start engine.

 

Your gas door doesn't have this on the inside???



+1

 

This is what mine looks like lmao

 

mine runs on Mr Plutonium..

yal can kiss my white Azz.. if you can follow me into the FUTURE that is.

baaah.

 

I wouldn't even bother, personally. The computer will learn after a while. Within 500 miles or so, it'll get used to the higher octane rating and advance ignition timing to take advantage of the better fuel.

I wasn't saying it's good to run 87, just that as long as he was easy on the car he didn't do any damage.