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#1
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260E - hesitation
I have had this problem a while, but will try to find out what causes it.
When the engine is cold it runs fine. It is always OK at idle. When I accellerate the engine often hesitate. Specially at 30-80 km/t. It acelerates, but it has not got the power it should have. If I not push the pedal so much, it will accellerate better!! If I push the padal more again, it hesitates. During this hesitation another sound is coming from the engine. Not a bad sound, but a different sound. All cylinders are working. It runs smooth even when it hesitates. Only loss of power. With full throttle / kickdown, the accelleration is just fine. The mixture is OK, duty cycle OK, new o2 sensor, new fuel-pump relay, new injectors, no vacuum leaks. I have read some threads about replacing the airflow potentiometer. Do you think this will do? Or is it the EHA which "control" this? Any help will be appreciated. Grueng |
#2
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mine had a hesitation/ misfire under load (hills, acceleration etc) it needed new spark plug wires.
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'O=00=O' bmw 2002. long live the legend |
#3
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Quote:
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Kent Christensen Albuquerque '07 GL320CDI, '10 CL550. '01 Porsche Boxster Two BMW motorcycles |
#4
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I have this weekend inspected the airflow potensiometer.
It looks fine and there is minimal wear on the contact-surface. Resistance in ohm when pushing down the plate seems also OK. Is it possible that the EHA-regulator can couse this problem? If so, maybe I can try with a part from another car. Grueng |
#5
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Make sure the airflow meter pot is re-installed in the same exact orientation. Problems with this item most likely to manifest at/near idle. Enrichment needed at speed is less than at idle, but fuel flow is much greater. For this reason I would check on fuel supply, e.g. weak pump. Other than fuel, ignition advance, exhaust restriction, air restriction (e.g. clogged filter) are all possibilities.
Steve
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'91 MB 190E 2.3 '08 RAV4 Ltd 3.5 '83 Lazy Daze m'home 5.7 |
#6
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I marked the position before removing it.
Here is a picture of the pot-meter attatched: |
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