Fuel and Engines
BMW 5-Series

How can you eliminate idle hesitation on a 1986 BMW 535i?


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2015-07-15 21:43:05
2015-07-15 21:43:05
Hesitation fixRemove air inlet hose from air filter housing to MAF sensor. Spray carb cleaner into MAF sensor (with car off) and work flap slowly and wipe inside of MAF sensor with lint free cloth. Also check hose at MAF sensor for cracks.

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Bad idle, hesitation on acceleration, DEcreased performance and gas mileage.

Poor performance, hesitation and rough idle could be signs of worn out spark plugs.

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Was there any recent work done to the car? When did the idle problem start? Does the idle get worst when you turn on the AC? Answer these questions and then I may help.

There are a couple of reasons why a 1986 Isuzu will not idle. One reason could be the oxygen sensor and another reason could be in the fuel system.

Doubtful. Bad spark plugs would give you a rough idle, hesitation and poor performance. And they may also give you a P0300 code for random misfire.

Just changed plugs on my 1999 aurora and the gap was .05. It stopped a hesitation at idle too!

The idle for a 1986 Honda Accord is adjusted by a idle air control valve. These function by either tightening or loosening the valve. This controls how much air is allowed into the system, more air means higher idle and less means lower.

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That vehicle is throttle body fuel injected, there is no choke or idle adjustments. You have other issues such as a large vacuum leak causing your idle problem.

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Hey Jonathan==It varries between cars. If your car is later than about 1986 it is computer controled and you cannot change it. Sometimes if the idle speed solonoid is bad or dirty, the idle will be wrong. Goodluck, Joe A vacuum leak will also cause idle quality issues.

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