supermiatavaper

So I haven't posted on here in a while...which is a good thing I believe, considering I usually post questions or concerns. Fortunately my 8 has been well, esp after doing all the fluids, AEM intake, BHR catted midpipe, Turboxs catback, etc. No cels and feels excellent.

So, my new question is regarding this temporary bucking feeling I experienced on the way home from work today. My car's gas light came on this morning, which is rare bc I never let it get that low. I didn't have time so I drove to work and got gas on the way back. Long story short, after I filled it back up half way and turned it back on, I felt a bucking sensation maybe twice on the way back home (right after I put the gas in). For example I'd let off the gas, and as soon as I'd re-gas it, there would be a quick buck; almost like a minor misfire feel. No CELs, no codes, etc. When I got closer to home I went WOT a few times and it reached top power no prob, no lights again, and no more bucking.

My theory is that the fuel pump module got a little warm due to next to no gas being in the tank, and by the time I got closer to home, cooled back off. I've read about these pumps failing in older models (mines an 04'), esp overheating with higher mileage. My mileage is abnormally low, so I don't believe its on the way out, but do you guys thing this would contribute to such a bucking?

Loki

iTrader: (1)

It's hard to tell without OBD data. The fuel pump should have cooled off with the new gas. Anything is possible, but I would continue driving and try to reproduce the issue.

The fuel system pressure is not a function of throttle input, so if the issue occurs when applying gas, I would look more toward the air intake process. Again, OBD fuel trim and airflow data would help.

supermiatavaper

Thanks for the advice. I need to rescan it - but after that brief experience it's been fine. These cars can act very weird sometimes, even w/ a CAI as you know - esp. the AEM w/ the screens and their alignment. I remember just after installing it I had a rough idle and some weird issues until I straightened them out. For all I know I hit a pothole and something got moved even in the slightest. Today on the way home it drove fine, zero issues. At one point I thought my exhaust sounded weirder - like deeper and was popping more on shifts, but once I went full power and got on it, it was fine. Oh well, I'm sure if it was something serious I'd get a CEL or loss of power.

Loki

iTrader: (1)

Your ignition is fresh or confirmed healthy, right?
Because I would not assume this...
If you have those symptoms, the problem has already progressed signfiicantly.

supermiatavaper

Loki, I figured it out. Car is an 04 with only 12k miles. Like I said, I was experiencing the "bucking feeling", esp after driving for a bit. Same thing happened today after 20min of driving - I figured maybe it was bc it was 85 degrees outside and I was low on fuel again, perhaps the fuel pump. When I neared my destination I would give it gas in a higher gear, and it would just bog. Almost like a hesitation; trying to catch its breath.
I figured okay, let finish at my appt., and Ill get gas on the way back.

So I leave my appt. 30 min later, get my car, fire it up (starts fine) and look in my rear view. It is BELLOWING clouds of white-blueish smoke. I let it run for a few sec, checked for CELs, but there were no lights. Eventually the idle became very rough, and the smoke was excessive so I turned it off. At this point I'm ready to give up on the car, but I start googling symptoms of this. People are saying coolant could be leaking, it could be overheating, etc. Now I'm worried. I managed to move the car and found a considerably large spot of oil under it for only being parked 30min. I was relieved to see it was oil and not coolant. I pop the hood but could not find a leak for the life of me. The engine sounded fine too - and like I said no lights, so I figured it had to be fixable.

Finally I look at my front intake filter behind my grill (AEM cai), and it's SOAKED with oil. Literally dripping out oil as I look at it. This was where the leak was coming from. I've experienced this once before with the stock intake, so I know what I had to do. I literally ran next door to 7/11 and a doctor's office and managed to borrow a flathead and alan keys, and took apart the AEM intake. Oil everywhere. MAF was gunked w oil. I cleaned it all up, and popped out the MAF and hit it w some brake cleaner (couldn't access MAF cleaner ). Was not able to access the cone filter, but tried to soak up would I could by removing the outer sock breather and paper toweling the **** out of it.

Finally after two attempts I fired it back up and it was okay. The idle was normal instead of violent, and the smoke diminished substantially. I figured there would still be some smoke, because the rest of the oil is being burnt off / out of the system. After a few minutes of idling / driving back home, the smoke completely subsided. Also, my other symptoms were gone - the bogging, and also a weird intake / exhaust note that developed likely due to the soaked filter / intake.

So yes, I was trying to be proactive and topped off my oil one day, and likely added too much. This resulted in it accumulating in my AEM CAI, so much until the point where it nearly completely disabled my car. Thankfully this was only an hour fix that I could do in a parking lot with basic tools.

Now for my question:

No lights ever came on during this. On the way home though, when everything was fixed, I went WOT and it cut off around 7k. I tried it a few times after and it went to WOT no problem, no issues. Should I be concerned this oil getting into the system affected something else like the plugs?

Loki

iTrader: (1)

I wouldn't worry about it. I don't know why it cut off at 7k ( hiccup of oil?), but if it doesn't reoccur, don't worry about it.

Reoze

I'd be more concerned as to why the oil ended up in your intake to begin with. There's a few different reasons this could happen coming from a few different schools of opposing thought. I don't swing one way or the other, this is just what i've observed on the boards.

1. You overfilled the crap out of your oil.
2. This "could" be normal with extremely heavy driving.
3. You could've blown an internal seal which is causing the pressure within the crankcase to spew oil.

supermiatavaper

I 100% overfilled it like a douche. I barely drive this car. I've had it 6 months and maybe put 1200 miles on it. I did an oil change a few months ago, and figured I'd top it off w oil. I've read that they burn through it quickly, so I figured it couldn't hurt. My issue is that it's hard to read my dipstick, bc its the original 2 line one, and 90% it is slightly foamy from the condensation issue. So, the last time I did it it was definitely too high, and after a longer drive it all blew back into my intake.

I did a thorough cleaning today. Thankfully the AEM is very easy to disassemble. It is even very to get the front cone filter off. I just pull out the 6 front screws underneath the grill, stuck my skinny arms in, loosened the hose clamp, and slipped it right out. There was still some oil left so I cleaned it thoroughly along w the rest of the piping.

Thankfully, it feels and sounds much better now.