BAD news
 

So my BRZ is drinking antifreeze like its kool-Aid, blowing a little white smoke at the higher rpms and a burning smell is coming from the engine bay. I took it to the dealership today.

here is my datalog running the 1.54 UEL BETA map.

http://www.datazap.me/u/cjsporl/shel...7-8-9-10-11-12

I was having the same issue with my coolant.. can you explain whats going on in the beta man

I have no idea how to read that data map. @shiv@vishnu chime in please.

From your data linked above all the values look normal, except that after going into first gear you went full throttle down to 60% throttle then back to full then again back to 60% and again back to full throttle all before reaching redline and shifting into second. But by all means, I am not expert in tuning. I just noticed that is an extremely awkward way to drive a car.

From the symptoms you stated, it looks like coolant is being consumed unless there is a leak somewhere in the cooling system. If coolant is being consumed, I doubt a tune from shiv can fix the mechanical problem. Usually, the culprit would a leak in the head gasket. If there is a leak in the head gasket, you should notice several things such as but not limited to, overheating, sweet burning smell, white smoke, and lost of power. But, the easiest way to confirm is to drain the oil and check for signs of coolant in the oil. If there is any coolant in the oil it should look like melted chocolate milk shake. You can google "coolant in oil" for a better idea.

I hope you removed any aftermarket parts on your car before bring it in to the dealer as it would probably be the first thing they point at to place the blame on you, even though it is not remotely related. Especially in a high cost/labor intensive repair case such as replacing two heads or even just removing a head to replace a head gasket, dealers will tend to screw you.

Also, I would not mention anything to the dealer about what brand/oil you were using:
http://www.ft86club.com/forums/showthread.php?t=51960

Hard to say but maybe Brain forgot to rinse out all the coolant from the bottle before filling it up with oil. After all, the oil did come in an unsealed coolant bottle with a label made in Microsoft Word.

Good luck! Cheers.

No one else see the 20 AFR? Like how is your engine still running?

Is that bad? I check the oil weekly and I didn't see any coolant in the mix. I haven't been using that custom blended oil lately either because when I was filling the oil test kit I dropped the drain plug bolt so I replaced the oil with Mobil 1

AFR = Air to fuel ratio. 12~14 is considered "safe"

^ thats being loose...

http://www.turbobygarrett.com/turbob...g_rich_vs_lean

Someone told me the motors run lean from factory from the log it jumps from 12 - 15 - 20 AFRs needs retune.

The stock tune on the car does run lean. anything over 15 is horrible for your engine. 20 = lucky it didn't go BOOM. Also any subaru will idle at 14.7 AFR. Now that doesn't mean at WOT it should be anywhere near that high. WOT best AFR is like a 12-13

The 20 AFR was at 0% throttle. There is no fuel to the engine when you are off throttle and in gear (the wheels are keeping the engine going, which is why it will stall if you let it slow down to nothing). No fuel = high AFR reading. If anything that is a very rich tune...most of the on-throttle AFRs are in the 11-13 range.

The coolant system is a closed loop...nothing in a tune will cause you to consume coolant. Either coolant is getting into the combustion chamber (head gasket issue would be the most likely cause, I'd think) or you have a leak somewhere. If your exhaust smells sweet and there is white vapor with the engine fully warmed up, you are most likely burning a bit of coolant (if you're running E85 be sure to know the difference between the coolant smell and the E85 smell). Just need to figure out how coolant is getting into the cylinder. Check for puddles under the car...that would obviously indicate a leak somewhere. Put some cardboard or newspaper under the car to soak up anything (otherwise it might just evaporate away).

Again, though, no tune is going to affect that directly.

didnt notice throttle off in motion. :bonk: figured the afr reading would 0 not read @ max sensor. though that does make sense.

Also, when I had an FD it had both a coolant leak AND a leak inside the engine. I'll never forget the smell of coolant ever again...burned into my nostrils forever. If you're smelling burning from the engine bay itself you would also notice steam coming out of the engine (if it were a leak that was dripping onto something hot). Pop the hood next time you smell something and see if you can see anything like that. Really easy way to track down the source of a leak...find where the steam is coming from and look above that area.

He does have the white smoke symptom. As long as he's keeping his coolant topped off, he shouldn't notice overheating. I agree checking the oil for "chocolate milk", but keep in mind blown head gaskets don't always result in intermix. And if it's a small leak there may not even be a noticable loss of power.

Another thing would be to remove the radiator cap and rev the engine, see if there are a large amount of bubbles in the coolant. You can also probably find a combustion leak tester at an auto parts store, I don't think they're that expensive.

I would assume this tune is making the engine run rich. My exhaust tips are pure black. Although it is running at 20 afr around 3-5 rpms if you take a look at the log. Should i be concerned?