Question about 1999 Ford Escort

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Every time i switch on the engine the idle goes up down and swicthes off the problem has got wores were i am driving and even slowing down it goes out i took it to a garage and they done everything **** dont know whats wrong

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Idling goes up and down


If the air conditioning is on, then the engines idle will increase when the air conditioning compressor cuts in, and slow down again when the a/c compressor cuts out again.
If your model has a heat switch, if this is on, then the engine will idle faster, until the engine temperature reaches about 50 deg C, then as the glow rail switches off, the idle also drops back to normal.

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The tuning and timing of the car must be reset. The slow speed tuning is so low that it goes down when the drive is selected.
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Oil light goes on and off as i speed up and slow down in my hyundia tiburon


If when you speed up, the light goes off then it is building sufficient oil pressure. When idling it does not have enough oil pressure. U may have too thin of oil in it, need an oil and filter change, or the engine is wore. Other than that could just be a faulty sensor.

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Idle irratic


Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

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1 Answer

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2 Answers

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How old is the Catalytic Converter, sometimes they will get clogged up and affect performance.
Good luck

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