The gasoline problem.

[MTL_GTS-t]

I usually run Petro Can 94, since that's the only 94 available in Montreal. Lately the car has been backfiring when I let off the throttle, not real loud, but small pops. Tuesday I was off the island, and the car was dead empty, so I filled up with Shell 91. I couldn't find a Petro Can and even if I could, they're kind of rare off island that sell 94.
The car seems to run more consistently with 91, still pulls strong across the rev range, and it has completely stopped the backfiring. I'm glad I couldn't find a Petro Can.
I remember reading someone's post on here about the negative effects of Petro Canada's gas, with all it's additives and cleaners and whatnot. How accurate is that?

Just a note, if you're up in Mont Tremblant, there's a Crevier just off the track in the "old" village that sells 94. I asked the owner, and he said he gets it from Sunoco, and not from Petro Canada, which is odd, but great. I'm up there for the Ferrari Challenge this weekend, so I'm going to try a full tank to see how it compares.

[Stinky_1]

I have heard more horror stories from other gasolines than petro. But if you survey 1,000 people that all use petro gas, odds are good one or two of them will blame the gas for a problem with their vehicle.

I cant see how sulfer would have that instant of an effect on a fuel pump. It would have to be pretty potent stuff. And if it was "that" potent I would expect people to be getting holes in their gas tanks lONG before the fuel pumps all started dying.

Not to discredit the poster of the news. I am sure his fuel pump really did break, and that it happened when he has petro gas in the tank.

You can draw your own conclusions as to "why" it actually failed.

[BlackAura]

I'm new to this whole Skyline thing....still haven't written up my "zOMG!!!11 I finally got a Skyline OMGWTFBBQ" thread, but I've been reading a lot about this whole ethanaol addatives in fuel issue. Apparently newer cars are fine with it and have no problems, but older cars may have issues, because rubber fuel lines will start to degrade due to the ethanol content.

So what kind of fuel lines do skylines have? Haven't taken a good look at the engine yet (those lovely red covers keep distracting me ), but if Skylines do have rubber fuel lines, it's something that we should look into.

If it's something I'll have to worry about, maybe I'll drive out to Canmore weekly to put in Esso 92 octane...

I put in half a tank of mohawk E92 fuel (10% ethanol content) today, with the other half being standard 92 octane Esso fuel from Canmore, and the car seems to be running about the same. Are there any places in the city to get 92 octane regular gasoline? (no ethanol additives) If so I honestly think I'll just stick with that, and then I won't have to worry about it.

(GTR-guy told me when I was purchasing the car that she runs on 92 octane happily, and so far I've found that to be the case as well.)

I may also consider getting a chip like Joker's that will work with 91 octane, or even resetting the ECU to see if it will time itself to 91 octane without any problems (please let me know if you expect there to be issues, and I won't). But I have to drive the car on 92 for a while so I will know if there are any problems when I do switch over.

[RanDoMBanSHee]

with my 90 gts t i have the ecu chipped and it is set to run on 91.. but i also once and a while get a loud pop when i let off the gas.. mostly in second or highway driving... (is that a bad thing?) it also pops a little lighter when shifting from 1st to 2nd .. bad? .. i find when i add octane boost the only difference is i get worse milage and maybe a tiny unmessurable amount of more power but not really.. so i think the boost is useless unless you are planning to compete or get worse milage.. now that ive run a few tanks without it the popping has mellowed to next to none.. so i say just go for running your typical premium gas ... probly shell v power would be a safe bet..

[Stinky_1]

it still is on the rich side of yuor tune. Thats all. So it will pop when you give it heavy gas, let the turbo spool then let off the gas. The engine will add a certain amount of fuel for the air it thinks is coming in still, but really its just recircing or venting to the air if you have an AM BOV. So when you open the throttle plate a little bit again all that unburnt fuel heats up in your exhaust and pops.

its not going to hurt anything and is typical of a turbo charged car.

[bignate]

yea i get the same thing. fuel rich exhaust gases+hot cat= lots of pops. I've always thought it sounds pretty badass but I think id rather have my car tuned a bit leaner for performance sake. I really wanna go no cat/no resonator and see some flames! For track use only of course....

[Fr0sty]

diy octane booster on the cheap ..... http://www.gnttype.org/techarea/misc/octanebooster.html

+ wikipedia alcohol fuel info http://en.wikipedia.org/wiki/Bioalcohol