so i have been getting 29E2 for a while, recently put new front O2 sensors, new index 12 injectors, new hpfp, and new ngk plugs. i recently switched out my 4psi hobbs switch for a 15psi hobbs switch for my tbi. i have been running the tbi since it was beta and never had any problems but recently upgraded to the current tbi which flows a little more than the beta. all looked good but was still getting 29E2 codes for rail pressure. my lpfp sensor was changed out last year. i noticed when i did a pull the other day i got kicked into map 4 and looked at my logs and my hpfp took a dump. figured it was the hobbs so i adjusted it and took logs yesterday. strange thing is now my hpfp only dives at a random few spots. i got the hobbs switch from a buddy who had it laying around from an old mustang build so i am thinking it might be the hobbs. but for the last 6 months i have always gotten the 29E2 code and i never realized we had a sensor on the fuel rail until i looked closer on real oem. car is a 2010 135i 80k miles fbo inlets/outlets tbi and an inline walbro.

http://www.datazap.me/u/mike082802/l...1-4-10&mark=59

so the question is how many of you have actually had to replace your hpfp senson on the rail and can i check with inpa?