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|3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.|
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When i got mine, i changed the gas tank and the in tank pump/sender unit due to the same probelms but i was having hesitation startin at 2200rpm. i also noticed over the last couple of months that if i run anything less than chevron gas the car is harder to start (i guess its the gasahol) That ethanol crap is not good for the old electric fuel injection systems thats the only other solution that comes to mind. goodluck and if you have any other problems or if you need parts i have a bunch of stuff layin around
For the hard starting problem, I'd say it might be the 1 way valve in your fuel line. It only lets fuel go through the line going towards the engine, if it isn't working the fuel wont be held in the fuel rail it will run back into the tank. So that time where you're waiting for it to start(6-7 cranks) your just waiting for the fuel to get from the tank to the fuel rail.
try turning the ignition to the ON position and waiting a while for the pressure to build up. If it starts no problem after that it's the check valve. I forget the proper name for it.
If I do what you said and let the system pressurize for a few minutes, the car will start normally. Where is this check valve. There are about 5 or 6 little devices on various locations of the fuel line. I'm not sure which one to look for.
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