My '86 245 (B230F) is having intermittent problems with hesitation, almost to the point of "missing". The conditions appear to be as follows - less than 1/2 tank of fuel, after driving for more than 30 minutes, car idles fine but stumbles when gas is applied. Other things that I know - fuel gauge is inaccurate (it shows full when filled up, but drops off very quickly after 3/4 tank) and main fuel pump is a rebuilt-unit (Bosch with the red label on it by rebuilders)that is very noisy. I have not verified condition of in-tank pump.
Since this appears to be associated with fuel level, is this likely a hose in the tank or possibly a weak in-tank pump?
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