# My e34 runs fine, then warms up and dies out
**URL:** https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907
**Category:** NYSpeed Automotive
**Created:** [November 17, 2007, 6:00pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907 "2007-11-17T18:00:29Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@Coldaccord](https://forums.speedlife.net/u/Coldaccord)
#### Post date: [November 17, 2007, 6:00pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/1 "2007-11-17T18:00:29Z")
I have a 92 525i, 2.5 m50 non vanos, 5 sp.
My e34 runs fine for a couple minutes, then starts running like shit and won’t move. Thought it may be a clogged cat so I pulled the exhaust off, it’s running open header right now. Put a scanner on it; no problems, even though once it starts running like shit it throws a cel. It said it’s getting 1.12v at the o2 sensor, but the o2 sensor isn’t on there.
I just dont understand because it runs perfect for the first few minutes. good steady idle, etc. I don’t understand what it could be? As soon as it starts warming up it dies out. When I put the scanner on it when it started running like shit after I started it and ran it for a couple minutes it was at 54 degrees celsius (~129F)
any ideas?
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### Author:  [@16vCorvette](https://forums.speedlife.net/u/16vCorvette)
#### Post date: [November 17, 2007, 6:03pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/2 "2007-11-17T18:03:56Z")
Sounds like your problem is going from open loop to closed loop with the O2 sensor. O2 sensors normally operate between 0 -1V.
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### Author:  [@bracketracer](https://forums.speedlife.net/u/bracketracer)
#### Post date: [November 17, 2007, 6:05pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/3 "2007-11-17T18:05:27Z")
[quote=“16vCorvette,post:2,topic:38907"”]
Sounds like your problem is going from open loop to closed loop with the O2 sensor. O2 sensors normally operate between 0 -1V.
[/quote]
[quote=“Coldaccord”"]
but the o2 sensor isn’t on there.
[/quote]
Sounds a bit more complicated than that
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### Author:  [@bracketracer](https://forums.speedlife.net/u/bracketracer)
#### Post date: [November 17, 2007, 6:11pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/4 "2007-11-17T18:11:45Z")
[quote=“Coldaccord”"]
I have a 92 525i, 2.5 m50 non vanos, 5 sp.
My e34 runs fine for a couple minutes, then starts running like shit and won’t move. Thought it may be a clogged cat so I pulled the exhaust off, it’s running open header right now. Put a scanner on it; no problems, even though once it starts running like shit it throws a cel. It said it’s getting 1.12v at the o2 sensor, but the o2 sensor isn’t on there.any ideas?
[/quote]
what is the actual text of the trouble code? That car has the 20-pin diagnostic socket, right?
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### Author:  [@Violator](https://forums.speedlife.net/u/Violator)
#### Post date: [November 17, 2007, 6:18pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/5 "2007-11-17T18:18:40Z")
coolant temperature sensor (there may be 2) check/replace the one with more pins
IAC maybe
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### Author:  [@Coldaccord](https://forums.speedlife.net/u/Coldaccord)
#### Post date: [November 17, 2007, 9:18pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/6 "2007-11-17T21:18:47Z")
theres only 1. it just sucks cause its in my buddy’s uncle’s garage, and whenever he’s there im working or at school, so i seriously never get the time to go over and try and diagnose it
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### Author:  [@Coldaccord](https://forums.speedlife.net/u/Coldaccord)
#### Post date: [November 21, 2007, 3:38pm UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/7 "2007-11-21T15:38:32Z")
plus since there’s only 1 cts, i would imagine the gauge reads off it as well. and the gauge is accurate. I had a scanner on it again today and the gauge was saying the same thing that the scanner was
it was throwing 2 codes now though;
201: o2 sensor control
37: o2 sensor heater relay circuit
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### Author:  [@dmoffitt](https://forums.speedlife.net/u/dmoffitt)
#### Post date: [November 22, 2007, 1:42am UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/8 "2007-11-22T01:42:43Z")
sounds like your problem is you need more S38 in there.
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### Author:  [@Coldaccord](https://forums.speedlife.net/u/Coldaccord)
#### Post date: [November 22, 2007, 10:23am UTC](https://forums.speedlife.net/t/my-e34-runs-fine-then-warms-up-and-dies-out/38907/9 "2007-11-22T10:23:49Z")
lol. the only motor this car would see is an s5x. And it may never see that, if I get a different e34 first…