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 ?

 

Thanks,

 

Rob.

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.

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.