92 325is noob needs tech help - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 03-04-2004, 09:58 AM
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Hey All,
I just picked up a 92 325is for a great price. This is my first BMW, and I had some questions about mechanical oddities.

First, The OBC says to check coolant level, when I did it was indeed full. After some reading I suspect the float is gummed up or the switch is bad... easy enough fix.

Second The Temp gauge is all over the place. When on the highway, the gauge is steady at about the 10:30 position hovering right around the first line. Normal town driving the guage will come up to half, sometimes a little past half. Does this sound normal? I plan on doing the fan mod and cleaning up the float this weekend along with a new water pump.

Third, after driving with lights on, the OBC says Tail Light Failure. Reading tells me this is probably incorrect bulbs.

Last and most worrysome to me is a misfire under load, usually under 2500RPM. I replaced the plugs yesterday, but the miss is still there... seems to miss only after 10 minutes of driving. Engine cold, it runs fine. I am leaning toward coil packs, but have no way to verify which one is bad. Can someone help me out with the diagnostic? I doubt it's O2 sensor, but it probably needs changed anyhow. Is the BMW O2 sensor narrow range or wide range? 1, 3, or 4 wire?

And I would also like to check the ECM codes. What's the procedure for a 92? Build date is 2/92.

I do have a Bentley's manual on order.


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#2 (permalink) Old 03-04-2004, 11:34 AM
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My "Check Coolant Level" was on intermitently last week, but it was due for a service. After the serivce light reset, the warning went away.

I had a "Brake Light Failure" warning too, and got the bulb replaced for cheap.

Congrats on the purchase. I'm a complete newbie here, but I learn fast. I have a 92 325is also. How many miles on yours?
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#3 (permalink) Old 03-04-2004, 11:45 PM
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This is the procedure for reading codes and a list of what each means.


<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>
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#4 (permalink) Old 03-09-2004, 10:48 PM
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The misfire was a coil, and I did the water pump and fan mod this past weekend. So far this car has been very easy to work on. Found a thermostat blown apart, and pieces in the water pump. That was the gauge problem. Cleaned up the coolant float and fixed the problem with "Check Coolant." Control arm bushings are this weekend, and they look pretty easy too. I also need to pull the wheels and check things in the brake area. It's hard when you can only borrow a garage. The car has 120,000 on it.
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#5 (permalink) Old 03-09-2004, 11:07 PM
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Congrats on your purchase...I have a '92 325is also. Had the same check coolant and brake light problems..same fixs.. There's more info in the faqs section on
common problems http://www.bmw-forums.com/forum/inde...showtopic=1434

Great car and I've had no major problems what so ever...Enjoy the ride....
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