Author Topic: 92 e36 318is problem  (Read 2528 times)

92E36

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92 e36 318is problem
« on: October 15, 2010, 02:38:29 AM »
hi there all.

A bit of history.

had a problem with our 92 e36 318is and need your guys help. After a big storm we went to start it and it was only running on 3 cylinders. after 2 days i found that water had got into my ecu and fried it. We got another ECU out of another 92 318is. It was the same bosch number (0 261 200 950) but it had a slighty differant BMW number. My original number was 1739679 and my new part number is 1739423. i installed it into the car and it runs on all four cylnders but it would stall after about 4 mins. we plugged a computer into it and had 3 fault codes. O2 sensor fault, O2 sensor heater fault and tank vent fault. So i installed a relay into the 02 sensor relay slot(which was empty because my old ECU never ran a O2 sensor) and that fault code went away. Then i brought a O2 sensor and installed it at the bottem of the headers and plugged it into the O2 sensor plug which was there also. That got rid of that fault code and the car runs alot better.

 But i still have the tank vent fault code which i dont think will matter.

This is where the problem under light acceleration when its warm the car misses and farts and sounds like its running on 3 cylinders. but when im crusing in 5th or 4th etc it runs like a dream. its only realy after i change gears and accelerate or take off from traffic lights it does this. I have replaced the airflow meter and idle control valve of the car that the ecu came out of but made no differance.

Can anybody help me. are these to ECUs compatible by just installing the O2 sensor.or does anyone know a fix for this.

DesktopDave

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92 e36 318is problem
« Reply #1 on: October 15, 2010, 07:36:28 AM »
The DME can run with or without an O2 sensor, runs better with one.  I recall a problem with a plug in the firewall harness that had to be uplugged for an O2 sensor to run properly.
'08 Karmesinrot 128i 6MT
'86 Zinnoberrot 635CSi (M30B32/G265/3.46 torsen LSD)

Sold: '97 Montrealblau 318iS, '91 Brilliantrot 318i, '91 Brilliantrot 318iS

92E36

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92 e36 318is problem
« Reply #2 on: October 15, 2010, 04:52:02 PM »
can anyone tell me anything about this plug i have to unplug.

the cars only misses under hard acceleration. If i accelerate it lightly it is all ok????