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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-06-2015, 07:56 PM   #21
Ceric
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This is how the ICV and the Throttle work on a BMW:

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Old 05-06-2015, 09:56 PM   #22
tutran90
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Wat r your fuel trims? Check the line to fuel filter pressure regulator seen it b4. U should buy new maf oem only they are brittle.
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Old 05-07-2015, 09:07 AM   #23
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Originally Posted by mcgawn View Post
1, its getting to the correct temp of between 95.c and 99.c is this not correct? that is the reading from the ecu

2 i wouldnt say new as in brand new i mean clean :-)
96C is normal temp, BUT once the ambient temp gets above 70F you cannot easily flag a soft stat. Also the code you have is for a stat wiring or heater problem as I recall. P0128 is for a stat temp probl3m.
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Old 05-07-2015, 09:27 AM   #24
mcgawn
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This is how the ICV and the Throttle work on a BMW:

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Old 05-07-2015, 10:03 AM   #25
BaliDawg
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That video is friggin' awesome! Did you make it Ceric?
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Old 05-07-2015, 11:17 AM   #26
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Originally Posted by jfoj View Post
96C is normal temp, BUT once the ambient temp gets above 70F you cannot easily flag a soft stat. Also the code you have is for a stat wiring or heater problem as I recall. P0128 is for a stat temp probl3m.
I was able to identify my soft failing thermostat when I thought it seemed slow by logging the coolant temperature (OBD Fusion on iPad) from cold startup to full operating temperature on two M54 cars and compare them. I took both CSV log files and graphed them in MS Excel and it was immediately obvious.

There is a third party Windows program that uses the EDIABAS API to do logging of INPA data.
http://www.bimmerforums.com/forum/sh...ime-graph-view
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Old 05-07-2015, 12:29 PM   #27
BaliDawg
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I think the ICV remains partially open when the engine is off. The very end of your video showed that.

You can use the vacuum line from the purge valve for smoke test. I test several inlets including CCV hoses, dipstick tube, PS booster hose, intake, etc.

Someone should do a proper smoke test DIY with photos or video. I haven't seen a good one for M54 yet.
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Last edited by BaliDawg; 05-07-2015 at 12:31 PM.
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Old 05-07-2015, 01:32 PM   #28
mcgawn
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I think the ICV remains partially open when the engine is off. The very end of your video showed that.

You can use the vacuum line from the purge valve for smoke test. I test several inlets including CCV hoses, dipstick tube, PS booster hose, intake, etc.

Someone should do a proper smoke test DIY with photos or video. I haven't seen a good one for M54 yet.
I knew it did remain open a tiny bit but was completely starting to doubt myself :-)

I was thinking about the dipstick and would it work, I might try it from there actually later on and see how it goes, just need to find the right size hose to try it with
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Old 05-07-2015, 01:33 PM   #29
mcgawn
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Originally Posted by BaliDawg View Post
I was able to identify my soft failing thermostat when I thought it seemed slow by logging the coolant temperature (OBD Fusion on iPad) from cold startup to full operating temperature on two M54 cars and compare them. I took both CSV log files and graphed them in MS Excel and it was immediately obvious.

There is a third party Windows program that uses the EDIABAS API to do logging of INPA data.
http://www.bimmerforums.com/forum/sh...ime-graph-view
Only other e46 i know of someone having about where i stay is a 330 would that be the same?
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Old 05-07-2015, 04:50 PM   #30
BaliDawg
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Originally Posted by mcgawn View Post
I knew it did remain open a tiny bit but was completely starting to doubt myself :-)

I was thinking about the dipstick and would it work, I might try it from there actually later on and see how it goes, just need to find the right size hose to try it with
Just use a rubber glove, like the ones you wear to work on your car, as an adapter. It's stretchy and seals well. Cut off a section that fits the inlet you will use and stretch it over a piece of hose like spare fuel line.
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Last edited by BaliDawg; 05-07-2015 at 05:00 PM.
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