Question about 1994 BMW 3 Series
can anybody help me to find the IAT sensor in my 1998 E39 523i and will i have to disconnect the battery to change this as i would rather not as i have no code for the D player.
Any help would be great as the engine looks like a maze.
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Posted on Jan 02, 2017
are you sure you need the crankshaft position sensor changed. it is at the back of the engine i believe, but.....
check for a wet ecu first... read the note on e36...
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
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
all the way to engine failure and worst case burnt and shorted wiring
I'm on my 3rd ecu, took me and the repair boys a few years to figure this
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
you wont like me if i do? oh well nobody like me anyhow!
if the water jaket built up this much presher its likley to be a stuck thermostat or a blown head gasket,,,,to test for this,, have a "sniffer test" done they take some water out the water jaket and test it to see if it has any hydrocarbons in it,, if it has then its the head gasket poped or a cracked head!
this test takes no longer than 30 seconds to do,,,even stoping for tea!
if you fit a new thermostat first,,,, blead the air out the water jaket as well ,,,,,,,then if it boiles up,,,,its the head gasket?
see,,,you hate me now!!!! dont yer?
Posted on Aug 07, 2010
Testimonial: "your right i don't like you for that!!, however you have pin pointed it down for me i can live in hope it is the thermostat thanks for your help. "
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