phillys14

The impreza has 160k, recently tuned and appears great. When the problem starts, it will usually idle sith just a slight up and down to it. If you try to increase the rpm over 1000, then it sounds like it's choking and eventually dies. Will start again and die if you increase rpm. Eventually, if will run smooth for undetermined time, then repeat issue. One suggestion was water in fuel, these problems didn't start until topping off tank one day with 4 or 5 gals. With it running well somtimes after poor without cooling down, I'm not thinking vacuum, good thought or bad? No knock sound to engine. It doesn burn a very slight amount of oil, but not noticable to the point of ever needing to add oil between changes. As for rotten egg smell, not really, just not a normal exhaust smell. Thanks.

1997 Subaru Impreza Outback Wagon, will start up and idle just fine, run fine, after 5-10 min., will start to idle slow and fast, eventually dying, if giving gas, sounds like it is being starved or not running smooth and then die, the exhaust also seems to smell a little different when it does this (only when running strange). Can't say that the exhaust smells liek fuel, but maybe. If I shut off and let cool down, will start up and run fine again for a while. If driving, can only go about 5 miles from cold start, then it dies, try to restart a couple times, then runs fine for a few more mile before repeating. Mechanic check fuel pressure and was fine. Check engine lite codes for knock sensor, but multiple mechanics have said this will not affect much. Code is cleared and comes back to same code. Stuck in very remote location, possible oxygen sensor, ignitions module, maybe? Any help greatly appreciated.