Weird engine thing while on the freeway (ideas appreciated)

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Old 10-14-2008, 03:15 PM
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Weird engine thing while on the freeway (ideas appreciated)

So I was on the way back from San Jose this afternoon, and just before the Mowry exit in Fremont, the STI started acting like it was out of gas. I thought maybe my gas gauge was acting up again, (it read just under a 1/4 tank) and I pulled off and into the Chevron station. Filled up the tank and it stopped at 12 gallons. I thought that was a bit strange, since the care had just been acting like it had no go-juice. I drove it around a bit before getting back on the highway and finishing my trip home. After I got gas it hiccuped once or twice when I stepped on the accelerator but then it evened out and didn't give me any trouble the rest of the way home.

The only conclusion that's made any sense to me so far has been I might have had a little bad gas. Thoughts? Suggestions? Comments?
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Old 10-14-2008, 03:21 PM
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Old 10-14-2008, 03:24 PM
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Old 10-14-2008, 03:24 PM
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Originally Posted by PaulSTI
So I was on the way back from San Jose this afternoon, and just before the Mowry exit in Fremont, the STI started acting like it was out of gas. I thought maybe my gas gauge was acting up again, (it read just under a 1/4 tank) and I pulled off and into the Chevron station. Filled up the tank and it stopped at 12 gallons. I thought that was a bit strange, since the care had just been acting like it had no go-juice. I drove it around a bit before getting back on the highway and finishing my trip home. After I got gas it hiccuped once or twice when I stepped on the accelerator but then it evened out and didn't give me any trouble the rest of the way home.

The only conclusion that's made any sense to me so far has been I might have had a little bad gas. Thoughts? Suggestions? Comments?
I had similar symptoms when my coolant lines got air bubbles in them during a turbo swap. Have you taken any of your coolant lines off recently? Just a thought. Could have also been clogged/dirty injectors or maybe just some bad gas.
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Last edited by kyoung05; 03-30-2011 at 08:24 AM.
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Old 10-14-2008, 03:29 PM
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when was the last time you changed your fuel filter? Could be that it is starting to get dirty/restrictive. The fact that it hiccuped like that almost sounds like it was slightly clogged, the pressure built up too much and forced the clog through the system, clearing it.

Although either way I would check your fuel filter, and maybe try running some fuel system cleaner through it.
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Old 10-14-2008, 03:33 PM
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As i always say when this probablem occurs

You car is going to blow up. Probably at a very inoppurtune time. More than likely right after you wash and wax her. My advice... dont be in it when that happens.
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Old 10-14-2008, 03:44 PM
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Originally Posted by Irish_car_B0mb

You car is going to blow up. Probably at a very inoppurtune time. More than likely right after you wash and wax her.
or a full tank of gas! i got a tank of 96 at infineon once and blew my tranny at the start line...put in a new clutch when i fixed the trans and had to baby the whole tank of the good stuff!

ur car has super low miles doesnt it paul?
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Old 10-14-2008, 03:48 PM
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sounds like a bad batch of gas (lol), i had that happen a couple times when i would get fuel at the ma and pa station near my house...i don't get fuel there anymore....
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Old 10-14-2008, 03:51 PM
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Originally Posted by GotBoost?
when was the last time you changed your fuel filter? Could be that it is starting to get dirty/restrictive. The fact that it hiccuped like that almost sounds like it was slightly clogged, the pressure built up too much and forced the clog through the system, clearing it.

Although either way I would check your fuel filter, and maybe try running some fuel system cleaner through it.
its in teh tank
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Old 10-14-2008, 03:51 PM
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Originally Posted by scoo*B
or a full tank of gas! i got a tank of 96 at infineon once and blew my tranny at the start line...put in a new clutch when i fixed the trans and had to baby the whole tank of the good stuff!

ur car has super low miles doesnt it paul?
nah, it's got 46,000 or so.

and i'll check the fuel filter guys, thanks a lot for the input!
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Old 10-14-2008, 03:52 PM
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If you have an 04 STi, you might have to pull the small filters within the oil lines. I forgot the technical name for them, but they took them out of the 05+ STi engines. I took mine out and bad acceleration went away.
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Old 10-14-2008, 03:52 PM
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not like a misfire?
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Old 10-14-2008, 03:54 PM
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no, definitely not a misfire, it's like the engine is missing a stroke but no fuel is detonating.
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Old 10-14-2008, 04:13 PM
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Originally Posted by sigma pi
its in teh tank


not the fuel filter.

The fuel pump is in the tank.
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Old 10-14-2008, 04:22 PM
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Originally Posted by GotBoost?
not the fuel filter.

The fuel pump is in the tank.
STI fuel filter is in the tank right on top of the pump.

Thanks alot Subaru.

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