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Old 02-10-2013, 09:19 AM   #41
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Highly unlikely...
How could an empty tank not be an issue? For those of you with fi cars you should never romp on them with low fuel. I recommend at least 1/4 tank.
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Old 02-10-2013, 10:41 AM   #42
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How could an empty tank not be an issue? For those of you with fi cars you should never romp on them with low fuel. I recommend at least 1/4 tank.
Because its not empty! JK I was just under the assumption it was missing during idle. (First Start Up) If that was the case. It will be highly unlikely for it to missed fire. It would be another issue.

I would agree not to be below 1/4 of a tank when FI.
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Old 02-10-2013, 10:50 AM   #43
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Because its not empty! JK I was just under the assumption it was missing during idle. (First Start Up) If that was the case. It will be highly unlikely for it to missed fire. It would be another issue.

I would agree not to be below 1/4 of a tank when FI.
I assumed it was under load. I re-read the thread and that isn't specified

If it is missing at idle you need to check the basics: air, fuel, spark. Swap around coils, compression test, swap around injectors.
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Old 02-10-2013, 10:58 AM   #44
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I assumed it was under load. I re-read the thread and that isn't specified

If it is missing at idle you need to check the basics: air, fuel, spark. Swap around coils, compression test, swap around injectors.
Mike,

X2 can go either way it's all good!!!
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Old 02-10-2013, 03:52 PM   #45
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Problem fixed. I had to remove the intake because I had a coolant leak and when I put it all back the problem was fixed.

Now I just need to weld up the exhaust.

Aslo dose anyone know of a different or better radiator fan?

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Old 02-10-2013, 03:54 PM   #46
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Electric or Mechanical
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Old 02-10-2013, 04:04 PM   #47
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Electric

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Old 02-10-2013, 05:05 PM   #48
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Problem fixed. I had to remove the intake because I had a coolant leak and when I put it all back the problem was fixed.

Now I just need to weld up the exhaust.

Aslo dose anyone know of a different or better radiator fan?

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I'd highly recommend a smoke/pressure test to ensure a leak-free system. We put these cars together every day and we still pressure test them.
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Old 02-10-2013, 06:02 PM   #49
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Electric
What's wrong with OEM?
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Old 02-10-2013, 07:48 PM   #50
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What's wrong with OEM?
I hit a deer a few years ago and the shroud was cracked so I threw it away when I pulled the engine with plans to replace with OEM. Just figured I'd ask before I bought an OEM one.

So I took it around the block and noticed that under boost A/F raito is good but at partial load it goes super lean. Idle is also steady(14-15.4).

My partial load I mean just normal driving not flooring it.
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Old 02-10-2013, 08:00 PM   #51
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How lean?
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Old 02-10-2013, 08:17 PM   #52
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Well I have the digital AEM guage and it goes off the scale

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Old 02-10-2013, 08:17 PM   #53
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Old 02-11-2013, 09:39 PM   #54
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What temperature does the radiator fan come on?

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Old 02-12-2013, 04:51 AM   #55
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What temperature does the radiator fan come on?

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I honestly don't know.

There are 2 water temp sensors on the M54: Cylinder head, and coolant outlet at the radiator. The one on the cylinder head is used to run the EMS adaptations, and also the thermostat switching. The one at the radiator runs the fan.....I've only ever seen temps from the cylinder head sensor....and I'm not sure if most monitoring software even looks at the radiator temp sensor.

Edit: Here's what I was able to monitor in 2009...looks like I was watching both. Note the temp range available as well:



One good piece of info is that the radiator fan is controlled by a solid state relay that is mounted onto the fan assembly. (Thats the black blow a the top) This means you can use a low level switching signal to control the fan if you want externally.

Last edited by PEI330Ci; 02-12-2013 at 04:56 AM. Reason: Auto-save 1360666579
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Old 02-13-2013, 08:38 PM   #56
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Oh okay cool. Also how easy is it to kill a PS pump from running empty?

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Old 02-14-2013, 07:31 AM   #57
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Oh okay cool. Also how easy is it to kill a PS pump from running empty?

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Steering rack leaking? I had this problem a few years ago...

I never killed my pump, but you will if you run it for a while like this. It would be pretty obvious though, as the steering at slow speeds would be a handful. (Manual steering)
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Old 02-15-2013, 08:55 PM   #58
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Well its done with the exception of the Power steering. Right now I am using the M3 Pressure plate with the stock clutch and it seems to be holding fine(car hasn't seen full boot though). I have a new clutchnet Kevlar clutch but I won't put it in unless I need to.
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