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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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Old 12-29-2008, 08:27 AM   #1 (permalink)
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89 325is fuel or elec problem

I have a 89 325is, The car started like it was missing and slowly got worse now it will start but will only stay running 30 seconds or less. I have changed spark plugs, wires, dist cap, rotor, main relay, fuel pump relay, fuel pump, new ecu, pulse sensor, fuel filter, coil what else can it be at a loss
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Old 12-29-2008, 08:40 AM   #2 (permalink)
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So, after it dies can you restart again straight away ?
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Old 12-29-2008, 08:45 AM   #3 (permalink)
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yes i can
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Old 12-29-2008, 08:48 AM   #4 (permalink)
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I know youve done all the fuel parts, but it sounds to me like fuel starvation,have you changed the fuel filter.?
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Old 12-29-2008, 08:51 AM   #5 (permalink)
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yes, even checked all the fuel lines
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Old 12-29-2008, 08:53 AM   #6 (permalink)
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Sounds like youve got air getting in to the fuel system, sounds strange take the fuel filler cap off and see what happens.
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Old 12-29-2008, 08:53 AM   #7 (permalink)
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the only thing i have not done is change the injectors
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Old 12-29-2008, 08:55 AM   #8 (permalink)
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i have done that it still does the same thing
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Old 12-29-2008, 09:00 AM   #9 (permalink)
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i dont know what else it could be
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Old 12-29-2008, 09:03 AM   #10 (permalink)
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Have you cleaned the throttle body ?
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Old 12-29-2008, 09:17 AM   #11 (permalink)
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If that doesnt work ,its down to one thing !!!

The Fuel Pressure Regulator #6 in the pic:

RealOEM.COM * BMW E30 325i VALVES/PIPES OF FUEL INJECTION SYSTEM
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Old 12-29-2008, 09:33 AM   #12 (permalink)
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ive cleaned the throttle body, the mass air flow sensor, and i have replaced the fuel regulator
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Old 12-29-2008, 10:03 AM   #13 (permalink)
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Ok, You will need to check the pressure in the fuel rail, if thats ok, then you are looking at the camshaft sensor or crankshaft sensor, but Im still leaning towards a fuel problem, also check for any leaks on the air intake hoses.
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Old 12-29-2008, 10:08 AM   #14 (permalink)
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pressure at fuel rail checked out fine,i replaced the pulse sensor which some call it a crankshaft sensor
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Old 12-29-2008, 11:17 AM   #15 (permalink)
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The crankshaft sensor is a different sensor than the camshaft sensor they are not one of the same. The crank...is situated normally down near the fly-wheel, cam.....is normally top front, so which one have you done.
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