Subarutex Posted February 20, 2006 Share Posted February 20, 2006 Problem usually occurs while under load (going up hill) or accelerating up to speed (45-60mph). Problem is... giving anything more than light throttle (like... an 1/8th) brat will start bucking, seems like its running out of gas or something like that. The problem is intermittent though. There are times where you can go full throttle, or anything in between and it runs just fine. Problem has occurred on the old Hitachi, and now on the weber. I also changed manifolds, to one that was de-emissioned. Fuel pump is new, replaced by previous owner, is hardwired to fuse panel, and the relay thing was broken (i guess..) New fuel filter in engine compartment. NO fuel filter before pump... i bought one to put in though. My theories so far: Stuff in gas tank, clogging pump intermittently. Water in gas tank (i bought some fuel dryer to throw in, but haven't done it yet) Catalytic converter is borked, cause weird issues? Any thoughts? Link to comment Share on other sites More sharing options...
Turbone Posted February 20, 2006 Share Posted February 20, 2006 Have you done any other tune up stuff to it? If so, I would go with the bottle of dryer. You may have garbage in the fuel system. Link to comment Share on other sites More sharing options...
Urabus-84HBDR Posted February 21, 2006 Share Posted February 21, 2006 my wagon was doing the same thing. Probalby water in the gas or sludge, could be the cat. conv. if its plugged up, its happened, I took them out on the sub. Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted February 21, 2006 Share Posted February 21, 2006 When was the last time you replaced the coil? -Brian Link to comment Share on other sites More sharing options...
soobscript Posted February 21, 2006 Share Posted February 21, 2006 My turbo did that for a while. Switching from 87 octane to 93 almost made it go away, then it only happened at WOT. Timing was advanced too far (eyeballed it without gun). Set timing correctly, now it's all fixed. Hasn't happened again on two tanks of 93 or half a tank of 87. I hope it's that easy for you. Link to comment Share on other sites More sharing options...
northguy Posted February 21, 2006 Share Posted February 21, 2006 Are all of the vacuum hoses connected properly? Link to comment Share on other sites More sharing options...
Ross Posted February 21, 2006 Share Posted February 21, 2006 I'd be cheking that ignition coil. Link to comment Share on other sites More sharing options...
Subarutex Posted February 22, 2006 Author Share Posted February 22, 2006 Well, I put a fuel filter in before the fuel pump this morning. And I added about a 1/4 of a bottle of gas drier to the 3 or so gallons of gas that were in there. No problems afterwards on my way to work, or on my way home. Nor on the trip to my parents house, then to dinner, then back. So... hopefully just bad gas, and after talking with some other local people, the likelyhood of this station having bad gas occasionally is pretty good. Really only happens with their premium though, which is what my roomates put in it when they borrowed it a while back, and since then it has had this problem. Sadly, I have nearly 3/4 of a tank of premium gas, from the same station, sitting in the RX. Could water in the gas cause massive detonation to blow 3 of 4 cylinders, and take the rings in 2 of those with them? Link to comment Share on other sites More sharing options...
syphon Posted February 22, 2006 Share Posted February 22, 2006 Sadly, I have nearly 3/4 of a tank of premium gas, from the same station, sitting in the RX. Could water in the gas cause massive detonation to blow 3 of 4 cylinders, and take the rings in 2 of those with them?I think you should get a lawyer to look into that for you Say the gas caused the crack in the windshield while you're at it! Link to comment Share on other sites More sharing options...
edrach Posted February 22, 2006 Share Posted February 22, 2006 Is the vent line to the gas tank still hooked up? Or is it plugged? Could cause intermittant fuel starvation. Link to comment Share on other sites More sharing options...
86 BRAT Posted February 23, 2006 Share Posted February 23, 2006 Problem usually occurs while under load (going up hill) or accelerating up to speed (45-60mph). Problem is... giving anything more than light throttle (like... an 1/8th) brat will start bucking, seems like its running out of gas or something like that. The problem is intermittent though. There are times where you can go full throttle, or anything in between and it runs just fine. Problem has occurred on the old Hitachi, and now on the weber. I also changed manifolds, to one that was de-emissioned. Fuel pump is new, replaced by previous owner, is hardwired to fuse panel, and the relay thing was broken (i guess..) New fuel filter in engine compartment. NO fuel filter before pump... i bought one to put in though. My theories so far: Stuff in gas tank, clogging pump intermittently. Water in gas tank (i bought some fuel dryer to throw in, but haven't done it yet) Catalytic converter is borked, cause weird issues? Any thoughts? Are you useing 93 grade fuel or better all early subis use hi test Link to comment Share on other sites More sharing options...
GeneralDisorder Posted February 23, 2006 Share Posted February 23, 2006 Are you useing 93 grade fuel or better all early subis use hi test That really shouldn't matter - most of us run 87 daily and are just fine. It's all about setting your timing right. With shaved heads, I run at about 6.5 - 7 degrees instead of the stock 8. GD Link to comment Share on other sites More sharing options...
wounded brat Posted February 24, 2006 Share Posted February 24, 2006 My 86 does the same thing I'm thinking the coil is breaking down cause its worse when its cold and under any moderate to heavy load plus the car has 216,000 on the clock and for all I know its the original coil. Link to comment Share on other sites More sharing options...
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