K say my buddy has autoenginuity and went to advance my timing the other day from 15 to 17 on a 2k se. It was fine and he went to check the diag. on the same program to make sure my timing had increased, it was reading 12-15, mostly in the middle around 13, which means if it did increase (+2) it was at around 11 to start, when stock is 15 (wtf). A few weeks ago I tried regular fuel because it was getting so damn expensive and I noticed a drastic decrease in low gear acceleration (due to my knock sensor retarding the timing) however, I went back to 91octane and within a few days the performance was normal again, as it had been my entire time owning the car. (which according to the program, "normal" would be 11) and I know the car would have been running like *%& with that timing. Anyways does anyone have any ideas to this fluke? P.S. I don't think I noticed much after the timing advance, I know it's not THAT noticable at all but still.

 

If you run advanced timing then you need a higher octane, generally speaking. On a side note, 20 cents more a gallon equals 4 dollars on a 20 gallon tank. If you divide that over a week or so that's less than a dollar a day. Isn't your car worth it?

 

I never said i didnt run higher? Im running 91 thanks... and that doesnt answer my question at all

 

Mine hovers @ 15 - 17 @ idle when I advance it to 17º

 

Mine ranges between 13-15 at idle and is not advanced.

 

and mine hovers at 12-15 and IS advanced +2..... thats my point.

 

91...
all i can get is 93...

 

whatever nevermind.

 

How do you know it is set @ 17º?

 

its NOT
re-read my post please, im not trying to sound like an @ss but no one has even posted a relavent response. he "supposedly advanced the timing with the program." double-checked my timing AFTER that and it was reading 12-15, meaning if it succesfully bumped it +2, stock would have been 11 which we all know its not.

 

If he supposedly advanced it maybe he didn't It's a simple thing to do, watch him next time and verify. Ask him to do it again.

Stack spec is 15 +/-5*. Some cars in high altitude locations were 13-14. Just because it's 'set' @ XX*, doesn't mean it will sit perfectly on there. Mine has it's ups and downs, but the setting is +2, and once in a while when everything is @ operating temp/levels, it does read 17* for a few split seconds.

 

i've advanced my timing with the autoenginuity tool. Did your buddy do the IACV relearn after advancing the timing? You'll have to shut off and then restart the car to double check the screen to see if the "+2 degrees" is still there. It should indicate what the original base timing limit was.

And the timing "hovering" isn't all that accurate. In that case mine is 16-17 degrees and sometimes 15-16 before I even advanced it (my Blitz R-VIT and Autoenginuity read the same values). But after my +2 advance it still reads the same and not 18-19

 

we didnt restart it, I didn't know about that. Oh well, thanks for the info, at least it's running fine, don't know if I did get that +2 after all though.

 

Where i use to live in PA we had a place that would sell 97...

on a different note, i wish i could find someone to do my timing advance no one around here will do it for some reason

 

The timing you record may not be exactly what you think it should be because the ECU usually has compensation measures that can effect the effective timing. It may have learned to retard slightly due to your 91oct. I've seen compensations done based on intake temps, atmospheric pressure, etc. My point is that unless you know exactly what's going on in the ECU, the timing you see may be slightly different than what you think it should be. These measures are usually there for a good reason.

Also, sometimes differente cylinders can run slightly different timing because of detonation tendencies in various cyclinders. I've seen this on different cars before. Sometimes certain cylinders tend to detonate more than others so the ECU reduces a couple of degrees on cylinder X to keep things happy. Depending which cylinder is used for reporting, your readings could also be off.

 

Hey guys, I was the one who advanced the timing on Jakillz car. I have the Autoenginuity w/ Nissan interface. Basically, like Jon said, the timing was sitting at an average 13 before, +2 and it stayed at an average of 15. I went back and checked the corrected timing degrees as well as the actual degrees. All of the other cars I've done (02 Maxima and 02-04 Spec-Vs) have all been at ~15 stock, ~17 w/ +2*.

Larrio, I did not do the IACV relearn, nor was I under the impression I needed to. Is there a reason I should?

 

When I worked at autozone we had that Launch-X341 scanner which did nissans, they let me use it once and i saw the same thing, I believe it was sitting at 14* and I bumped it to 17 and it went back to 14 when I restarted the car. It also fluctuated too while I was looking at it