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Guest Message by DevFuse

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Fuel temp and fuel tank pressure sensors

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2 replies to this topic

#1 BoxersOnly


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Posted 31 December 2003 - 02:31 PM

The '98 EJ25 I'm putting into my Beetle had fuel temp and fuel tank pressure sensors.

Are these sensors used only for the emission CEL ? Or are they actually used to make the engine run properly ?



#2 porcupine73


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Posted 05 February 2009 - 02:31 PM

Wow this thread has been on the waiting list for a long time! I believe they are for emissions purposes only. The ECU wants the fuel temp to be in a certain range along with some other parameters before doing the fuel system integrity test (which it then uses the pressure sensor in the performance of). There's a good emissions article on endwrench that probably has more info.

#3 davebugs


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Posted 05 February 2009 - 02:37 PM

Wow - old thread.

Wonder if he ever got this done.

And if it was a old Beetle or New Beetle?

I'm having troubles picturing a 2.5 in an air-cooled Beetle in the traditional place.

I had done the Corvair engine a few times years ago.

Haven't messed with a New Beetle yet.

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