Could a problem arise out of always having a low amount of fuel in the tank? I hardly ever have more than 1/2 a tank of fuel at one time and I usually add fuel when the guage falls between empty and 1/4 of a tank. I have 91,000 miles on my '00 Max SE (had it since the 55,000 mile mark). P0138 code pulled a month or so ago and repaired. Now, it's sputtering at times upon start with rough idle in drive until I accelerate somewhat. This morning was fine...fine cold start, no sputtering/hesitation whatsoever, etc. Just trying to figure out what the problem could be. Any tests I can run myself? The car hasn't had a tune-up since I've had it (not good I bet). Should I just wait until I get the code pulled first?
Thanks in advance... PJ