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1986 BMW 528e Repair Question


Topics covered: Fuel filter, Fuel pump, Fuel pump relay.
Mileage: 200,000 miles.

Asked on October 26, 2012

BMW 528e Fuel filter Problem

I have a 1986 bmw 528e and ever since i got it I have had to replace fuel filter, fuel pump relay and a fuel hose. After I replaced the fuel hose my car started having an erratic idle, it goes real high then drops real low, up and down continuously. What is the problem exactly? My guess is that it is the idle control valve. Am I correct?

Thank you
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Answer

Replied on October 26, 2012

Not just the ICV but the idle control unit may need replacement. Also check the two wires going to the ICV, if they are broken or not making a good connection, it will not idle correctly. Let me know what you find or if you need more help.

Tiny Answered by Dr. Hagerty (expert)
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