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E36/7 Z3 (1996-2002)
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  #1  
Old 12-20-2019, 11:22 AM
D_Rok D_Rok is offline
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Location: East Tennessee
 
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Mein Auto: 97 Z3 1.9L
Fuel Tank Pressure Sensor

After a few days and some work I have figured out that my 97 1.9 Roadster isn't starting because of my fuel tank pressure sensor not being plugged in.

Does anyone have any info or links that can point me in the right direction to finding where that sensor is located and where that pesky wire/plug may be hiding? I have the end that I believe runs to the DME but appear to be missing the side of the plug that runs to the sensor itself.

Thanks to some help from my last post I was able to figure out that was my mystery cable that wasn't plugged in. Could that be a good reason the car wont start? I have a replacement pump relay just in case and I tested my fuel pump and it works 100%. I made sure I was getting fuel to my fuel rails (haven't been able to check pressure yet). The car hasn't been started in some years but wanted to fire once we hot wired the fuel pump. Could that sensor cause the engine to not run properly? It would spit and sputter and try to idle but it couldn't maintain a good idle.
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Old 12-20-2019, 12:33 PM
zed3coupe zed3coupe is offline
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https://www.realoem.com/bmw/enUS/sho...diagId=16_0205

Looks like it is on the fuel tank itself. Part #19. looks like on top near filler neck
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Old 12-20-2019, 01:05 PM
D_Rok D_Rok is offline
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that'd be it. Thanks.

Any tips on how to access it and make sure the wires are even coming from it? maybe remove the passenger wheel that its next to and see if its accessible?
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Old 12-20-2019, 03:16 PM
zed3coupe zed3coupe is offline
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Never messed with one of those. I would start with what you are thinking. Feel around, maybe use a mirror to see it. Looks like two bolts or nuts hold it in place. Not sure how much room is there but you maybe able to just feel around and make do.
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Old 12-21-2019, 10:40 AM
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Randy Forbes Randy Forbes is offline
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Quote:
Originally Posted by D_Rok View Post
that'd be it. Thanks.

Any tips on how to access it and make sure the wires are even coming from it? maybe remove the passenger wheel that its next to and see if its accessible?
Yes, but you're not going to like it...

Caveat: I haven't worked on a 4-cyl Z3, but on any 6-cyl version, THE ONLY WAY to access the top of the fuel tank is to remove it, which I have done on several cars.

BTW, THE ONLY WAY to remove the fuel tank, is to drop the entire rear suspension, and the exhaust system...

http://spcarsplus.com/piwigo/galleries/cmr/IMG_3707.jpg

http://spcarsplus.com/piwigo/galleries/cmr/IMG_3710.jpg

http://spcarsplus.com/piwigo/galleries/cmr/IMG_3728.jpg

http://spcarsplus.com/piwigo/galleries/cmr/IMG_3785.jpg

Have fun, good luck, and Merry Christmas...

Edited: pity, I can no longer post pictures in the threads here
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1999///M Coupe Estoril Blue Eurosport Twinscrew S/C
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Last edited by Randy Forbes; 12-21-2019 at 10:43 AM.
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Old 12-21-2019, 03:06 PM
nfunk nfunk is offline
1998 BMW Z3 2.8L
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OUCH! I guess it that would be a good time to update the rear suspension.
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