Possibly my oem fuel reg was already shot when I put the 255 pump in, but yeah it wouldn't come down lower than 50psi I think. Drilled out, then bypassed the venturi, didn't help either.
edit: its also hardwired, no variable voltage thing anymore
I had to get an aftermarket pressure regulator when I switched to a walbro 255 in my R34. I couldn't get the idle pressure to come down without it, and it was causing a rougher idle as well, although not to the point of stalling.
I just ordered a double din android head unit that can display engine parameters with a obd2 scanner. I have a Haltech though, so I don't know if the stock ecu can do this?
I only put in a 255. Yeah I thought it was strange too. I had seen lots of posts on here saying the stock reg was good for mild pump upgrades. Possibly the oem fpr was clapped the entire time and I only checked fuel pressure after installing a new pump
When I did my walbro swap, my base fuel pressure increased by about 10psi, which could affect fueling a bit. I had to get an aftermarket fpr bring it back to normal pressures
Lol I hope to take it out this weekend and rip it around. I’m curious to see how far off my fuel map is now that I’m running 10psi less base pressure. I do need to get a pressure sensor next season to keep an eye on it.
Stock rail but 1000cc Bosch injectors. Is there a reason for Tomei being junk? Seems like the easiest option since it has fittings and a mount already included
Any current recs for a good budget reg? I don’t want to buy some cheap eBay stuff, but also don’t want to drop $500 on just a regulator. I’ve seen some for about $140-$170 like Tomei, P2M, NRG, AEM, ect
Alright, I've started looking for an aftermarket reg. This cars been a bottomless pit so far, and I haven't even started the proper power mods yet lol.
thanks
Yep stock reg. Ill look into a new reg, just seems strange that it drops the pressure fine when I remove the return line. Also seen posts on here saying the stock reg is good for mild pump upgrades. It is 25 years old I guess