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E28 (1982 - 1988)

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Old 01-17-2012, 08:38 AM
Flanagan Flanagan is offline
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Location: New Hampshire
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Mein Auto: '86 528 E
'86 528, electrics pulsing, throttle pulsing

I have an issue w/ my '86 528e and am seeking some direction, when running at idle all items on the electrics have a rather quick(and rather pronounced) flickering going(lights, int,ext, radio), the temp gauge fluxuates wildly, once warmed up the throttle surges to 1200rpm then down to 800rpm(occasionally settling in the 1100-1200rpm area), some times once warm it will simply die as if it was starving for gas, and can be difficult to re-start, I love the way this car drives, it is a 5 spd stick, I am new to Beemers, this car is strickly a driver, and I drive alot, so if it is not running right I have a problem, any help would be greatly appreciated...Thanks
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Old 01-17-2012, 11:50 AM
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catso catso is offline
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Mein Auto: 2000 323i, 1988 528e
Start by cleaning all the electrical connections you can easily access: battery terminals, chassis ground, engine ground, etc, then remove and inspect all your fuses. It could be a wiring problem, alternator problem, or possibly even a bad battery. These older cars are prone to having electrical issues usually caused by corrosion or sometimes even broken wires. Just because a wire connection is insulated doesn't mean it's not corroded inside the insulation. I recall someone having a similar problem with a bad wire on his alternator; visually looked OK, but corroded under the insulation. A voltmeter might be useful in tracking down the poor connection.
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Old 04-23-2012, 01:30 PM
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Newman271 Newman271 is offline
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Mein Auto: 99' 540i M-Sport
The pulsating could also be voltage regulator on alternator, I beleive Autozones can check your alternator for this problem.
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