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.
When i first start the car it will idle fine but once i start to drive away it will bog-down but the engine wont stall or anything it just bogs. then, once the engine warms up a bit, it will run fine and feels like it did when i first got it. every once-in-a-while when i take a 30 min. or so ride around the area it will start boggin down. its fine if im just barely giving it gas but once i hit the gas hard its as if im half-way with the gas pedal. i narrowed it down to either the Throttle Position Sensor or the Idle Speed Regulator. can someone help me out?
How long since the ignition system has been serviced? Has the intake boot been checked for cracks? When idling, the M20 throttle is closed; idle air supply is by way of the idle bypass (fairly easily seen on the throttle body).
I would most certainly do the obvious cheap things to clear this one....check wires and so forth, do a tune up (start with the plugs only) and keep moving forward...my guess is either a coolant temp sensor or an air leak as mentioned previously...good luck
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