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fuel starvation when accelerating
Posted 07 January 2004 - 02:06 AM
Got another problem that I am hoping you can help me with. This one just developed a few days ago. Occasionally when the car is accelerating or under a load (going up a hill), the engine will start sputtering and running rough....like it is not getting fuel or the car has run out of gas. It will do this intermittently from time to time. When it does this it will do it for 5-10 seconds and be done. Otherwise this car runs perfectly. It idles perfect and performs perfectly. But it only does this when it is under a load. When it is doing this and I floor the pedal to kick in the 2-barrel, it runs fine and takes off. So I don't think it is the fuel pump or the fuel filter. Because if either of those 2 were bad, the problem would be aggravated when kicking in the 2 barrel and needing more fuel. It typically does this at a higher RPM range also, like when you are winding out the gears when accelerating. At lower RPMs it does not have a problem. It acts as if it is starving for gas....not like it is misfiring or anything. It has steadily gotten worse over the past week. Fuel filter has been replaced, along with dist cap, rotor, plugs, wires, and a new catalytic converter about a year ago. Car has a Hitachi 2BBL carburetor. Could this be a symptom of a carburetor problem or something else? Any help is greatly appreciated! Thanks.
1987 Subaru STD 4WD Hatchback
EA-81 w/hydraulic lifters
Hitachi 2BBL carb
Single range 4WD
Posted 07 January 2004 - 02:32 AM
Posted 28 December 2011 - 07:18 PM
I already have an aftermarket fuel pump from autozone; was only $30 after using the $20 credit I had. It says in the instructions to wire it to the oil pressure switch but I'm not sure if this car has one or where it is. Can I not just wire it to the original wires?
I think it may also be a vacuum leak but it looks like the EGR system has been removed by a previous owner and I can't find a very good diagram.
Also the car has exhaust leaks.
When it's warm out and has a full tank of gas it drives awesome and is so fun.
Any help would be very much appreciated as I am working on a budget and really have no clue where to start.
Posted 28 December 2011 - 08:50 PM
Posted 28 December 2011 - 10:37 PM
Thank you for your input! I will let you know how it goes tomorrow afternoon.
Posted 29 December 2011 - 01:55 AM
Posted 29 December 2011 - 02:32 AM
Tomorrow afternoon I will be taking of that metal plate that houses the square fuel pump and fuel filter. I will also look at the Vapor separator that you talk of. I have looked at the fuel pump already and it looks like it has never been touched and the steel plate housing it has probably never came off before.
Posted 29 December 2011 - 08:11 PM
Posted 30 December 2011 - 12:04 PM
I can't look at the car till after 4pm and it get's dark shortly after so I never have time to really get into it. Will be working on this today for an hour and all day tomorrow.
If I did find this fuel vapor separator where would I find another one? Can't find it anywhere online. Do I need to go ask the dealership?
Also does anyone know about installing this aftermarket fuel pump? The instructions say to wire it to the oil pressure safety switch but why can't I just wire it to the old wires?
I kind of want to narrow this down before I start replacing parts and spending money.
Thank you so much for your help sidekickin. Will keep you updated.
Posted 30 December 2011 - 06:52 PM
Maybe my car doesn't have the fuel vapor separator because it has the EA82 engine? Also when I went to find the fuel pump fuse it was already disconnected so the fuel pump must have already been rewired by some one else.
I'm getting no where fast with this car.
Posted 30 December 2011 - 11:25 PM
Posted 02 January 2012 - 08:48 PM
Just need to figure out why the choke does not work correctly when I first start it and with the heat/AC on.
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