Question about 1998 BMW 3 Series

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I have a 1998 BMW 318ti, the car feels as if there is a lack of power you can floor it and it really doesnt respond as it should. The car has 40k miles on with ABS light on and traction control light on. Jerks sometimes when switching gears

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  • 96 Answers

Wow a 98 with only 48K anyway...

my bmw experiences leads me to the wet eci box.

the ecu compartment is under the windshield on the passenger side on E36

you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that
compartment.

the bottom side of the circuit board gets wet and starts corrosion.

remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.

you should be able to see the signs of corrosion or conductive build up.

this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other
sensors....(i.e. crankshaft position etc.)

all the way to engine failure and worst case burnt and shorted wiring
harness.

I'm on my 3rd ecu, took me and the repair boys a few years to figure this
one out.

BTW: i would get that ecu mounted above that flat surface, use some sort
of standoff to raise it so that it is not laying in the wet.

Posted on Feb 07, 2010

Testimonial: "Do you have any pictures to show where the ECU is located?"

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