[itsahappyisaac]

Originally Posted by dcorn

OP, you haven't ever noticed these same symptoms after the tune and before the cold weather? Other than traction control (unlikely with an Xi, but who knows), I don't see any reason why the car would hesitate because of cold weather. Hell, the car should love the colder weather keeping IAT's down, you should actually get higher boost with the denser air.

I just got a walnut blast done and my car runs noticably better than before. The car only has 69k miles and it would stutter and hesitate under boost while accelerating, which has completely gone away with clean valves. I'd say take the tune off until you get that work done.

Now, if the car was running perfectly before the tune and cold weather, it's possible the denser air charge has thrown off the air/fuel ratio and caused a misfire problem, but I feel like you'd hear a lot more about that on the forum.

I think you're right, I've owed this car for 20k I'm sure I'm due. I noticed a light stutter/hesitation and maybe the cold made it a little worse, either way a walnut blast was on the agenda. Just made an appointment for one

[TheMidnightNarwhal]

Originally Posted by itsahappyisaac

I think you're right, I've owed this car for 20k I'm sure I'm due. I noticed a light stutter/hesitation and maybe the cold made it a little worse, either way a walnut blast was on the agenda. Just made an appointment for one

I removed my MHD tune (set it to Stage 0) and it actually runs a bit better aswell here.

I also think I'm due for walnut blast but man it's not cheap here.

[itsahappyisaac]

Originally Posted by TheMidnightNarwhal

I removed my MHD tune (set it to Stage 0) and it actually runs a bit better aswell here.

I also think I'm due for walnut blast but man it's not cheap here.

It's in the shop for a blast right now for 580 after supplies and tax. So no but I was comfortable spending that knowing how much better I'll be running.

He also informed me that since the intake is off already, it is a good time to replace my oil filter housing gasket which is leaking on to a drive belt and into a coolant hose. If my belt were to snap, it could get sucked into my crank seal and would be a nightmare. So yeah I wasn't expecting to drop $2200 bringing it in for a blasting.

[TheMidnightNarwhal]

Originally Posted by itsahappyisaac

It's in the shop for a blast right now for 580 after supplies and tax. So no but I was comfortable spending that knowing how much better I'll be running.

He also informed me that since the intake is off already, it is a good time to replace my oil filter housing gasket which is leaking on to a drive belt and into a coolant hose. If my belt were to snap, it could get sucked into my crank seal and would be a nightmare. So yeah I wasn't expecting to drop $2200 bringing it in for a blasting.

Ah ok I guess the pricing I got here is in the norm then. 570$ Canadian.

Yeah good idea you got it changed. I did mine when I got the car as mine was leaking a bit. It's not to hard to DIY and much cheaper but if you don't have time to do so it's normal.

I'm really thinking of taking of my intake manifold once winter is over to see how dirty they are and then I'll take my decision.

I'm just afraid to dump 600$ for one service ya know and my car gets totaled or engine seizes or something haha. I know there's slight chance but it's always in the back my head

[itsahappyisaac]

Originally Posted by TheMidnightNarwhal

Ah ok I guess the pricing I got here is in the norm then. 570$ Canadian.

Yeah good idea you got it changed. I did mine when I got the car as mine was leaking a bit. It's not to hard to DIY and much cheaper but if you don't have time to do so it's normal.

I'm really thinking of taking of my intake manifold once winter is over to see how dirty they are and then I'll take my decision.

I'm just afraid to dump 600$ for one service ya know and my car gets totaled or engine seizes or something haha. I know there's slight chance but it's always in the back my head

The better you take care of it the less likely is it to happen

[slides]

I got walnut blasting done for $350 down in Burnsville.

I have DCI, FMIC but no tuning and my car acts weird in the cold temps also. Plus its damn near impossible to get it above 210f in winter, and my tires spin at 80mph if I do a pull.

Winter sucks.

[TheMidnightNarwhal]

Originally Posted by slides

I got walnut blasting done for $350 down in Burnsville.

I have DCI, FMIC but no tuning and my car acts weird in the cold temps also. Plus its damn near impossible to get it above 210f in winter, and my tires spin at 80mph if I do a pull.

Winter sucks.

Yeah same here for the temps. Only hit around 158f to 176f.

Hope this doesn't wear out the engine real bad, or the rod bearings which seems to be happening once a week on here but more on the N55s.

[tony55343]

Originally Posted by slides

I got walnut blasting done for $350 down in Burnsville.

I have DCI, FMIC but no tuning and my car acts weird in the cold temps also. Plus its damn near impossible to get it above 210f in winter, and my tires spin at 80mph if I do a pull.

Winter sucks.

Did you get your walnut blasting done by Alex? I need to get to his place and have mine done soon.

Car also acts weird in cold temps, really hates the weather right now its so darn cold. Traction control kicks on so dang easy too with the cold weather.

[itsahappyisaac]

Originally Posted by slides

I got walnut blasting done for $350 down in Burnsville.

I have DCI, FMIC but no tuning and my car acts weird in the cold temps also. Plus its damn near impossible to get it above 210f in winter, and my tires spin at 80mph if I do a pull.

Winter sucks.

Where did you do that? I went to Eurotech in New Brighton.

[Jeff@TopGearSolutions]

Originally Posted by TheMidnightNarwhal

I removed my MHD tune (set it to Stage 0) and it actually runs a bit better aswell here.

I also think I'm due for walnut blast but man it's not cheap here.

How many miles on the spark plugs? Cars typically run better in the cold, more oxygen per molecule = better performance.

[TheMidnightNarwhal]

Originally Posted by Jeff@TopGearSolutions

How many miles on the spark plugs? Cars typically run better in the cold, more oxygen per molecule = better performance.

I don't know. I bought the car at 89 000KM this ~ July now I'm at 102 000KM.

They may be the main issue.. just I haven't really have typical spark plug symptoms.

[blown07]

Originally Posted by Jeff@TopGearSolutions

How many miles on the spark plugs? Cars typically run better in the cold, more oxygen per molecule = better performance.

Yes I couldn't agree more about the air density. My log with the AWD shows IAT of 33F at 20PSI (with Meth) VD shows 522whp/490wtq. Not sure how accurate but I don't see numbers this high in warm weather.

[MysticRob]

Even though I'm no scientist, I'm pretty sure "more oxygen per molecule" isn't really a thing. Otherwise an O2 molecule would no longer be an O2 molecule.

How about if we go with colder (aka denser) air contains more O2 molecules?

[dpaul]

Originally Posted by MysticRob

Even though I'm no scientist, I'm pretty sure "more oxygen per molecule" isn't really a thing. Otherwise an O2 molecule would no longer be an O2 molecule.

How about if we go with colder (aka denser) air contains more O2 molecules?

Of course you are basically correct - cold air is denser and so there are more molecules per unit volume at any given pressure. However, "more oxygen (atoms) per molecule" is actually a thing. Single oxygen atoms rapidly combine to form molecules with either two atoms (very stable and common in nature) or three atoms (much less stable), the latter known as ozone.

[blown07]

Originally Posted by dpaul

Of course you are basically correct - cold air is denser and so there are more molecules per unit volume at any given pressure. However, "more oxygen (atoms) per molecule" is actually a thing. Single oxygen atoms rapidly combine to form molecules with either two atoms (very stable and common in nature) or three atoms (much less stable), the latter known as ozone.

Time to spray my car with ozone...assuming my manifold bolts can take it.

[Jeff@TopGearSolutions]

Originally Posted by TheMidnightNarwhal

I don't know. I bought the car at 89 000KM this ~ July now I'm at 102 000KM.

They may be the main issue.. just I haven't really have typical spark plug symptoms.

Spark plugs tuned should be replaced every 25,000 miles. Something worth doing even as proactive maintenance and to rule it out. Walnut blasting as others mentioned is another one.

Originally Posted by blown07

Yes I couldn't agree more about the air density. My log with the AWD shows IAT of 33F at 20PSI (with Meth) VD shows 522whp/490wtq. Not sure how accurate but I don't see numbers this high in warm weather.

[Jeff@TopGearSolutions]

Originally Posted by MysticRob

Even though I'm no scientist, I'm pretty sure "more oxygen per molecule" isn't really a thing. Otherwise an O2 molecule would no longer be an O2 molecule.

How about if we go with colder (aka denser) air contains more O2 molecules?

Originally Posted by dpaul

Of course you are basically correct - cold air is denser and so there are more molecules per unit volume at any given pressure. However, "more oxygen (atoms) per molecule" is actually a thing. Single oxygen atoms rapidly combine to form molecules with either two atoms (very stable and common in nature) or three atoms (much less stable), the latter known as ozone.

You guys can call it whatever you want as long as the result = more POWA!

[TheMidnightNarwhal]

Originally Posted by Jeff@TopGearSolutions

Spark plugs tuned should be replaced every 25,000 miles. Something worth doing even as proactive maintenance and to rule it out. Walnut blasting as others mentioned is another one.

I definitely agree.

I'm still looking around for a walnut blast service that is affordable here. Will do one after winter.

[dpaul]

Originally Posted by blown07

Time to spray my car with ozone...assuming my manifold bolts can take it.

Nitrous oxide safer and cheaper (and more fun in some other ways). But safe and cheap is not our way!

[MysticRob]

Originally Posted by blown07

Time to spray my car with ozone...assuming my manifold bolts can take it.

I'm using pressurized canisters of Hexavalent Chromium, tapping a hose for my own use. Causing nose bleeds but I heard that's normal.

[Jeff@TopGearSolutions]

Originally Posted by MysticRob

I'm using pressurized canisters of Hexavalent Chromium, tapping a hose for my own use. Causing nose bleeds but I heard that's normal.

I've been drinking water from a well down in Hinkley, it's proven effective for a boost in the gym...

[MysticRob]

Originally Posted by Jeff@TopGearSolutions

I've been drinking water from a well down in Hinkley, it's proven effective for a boost in the gym...

Jeff, overheard looking at himself in the gym: "Bite my ass, Krispy Kreme!"

I'm done.