Jump to content
SAU Community

Recommended Posts

Well last night i decided to do a bit of work to my car and when i was fiddling around in the FPR area i noticed that a hose looked a little bit loose, so i grabbed it and it fell off, it looked like it had been broken for some time. Im just wondering what happens when the FPR isnt connected? Ive noticed my car being a bit fuely lately but yeah, should the car even run? I never noticed a Vacuum leak but yeah.

Cheers

Well last night i decided to do a bit of work to my car and when i was fiddling around in the FPR area i noticed that a hose looked a little bit loose, so i grabbed it and it fell off, it looked like it had been broken for some time. Im just wondering what happens when the FPR isnt connected? Ive noticed my car being a bit fuely lately but yeah, should the car even run? I never noticed a Vacuum leak but yeah.

Cheers

It will run richer than usual on idle (or when a vacuum is generated in manifold) and leaner than usual when running boost. The fuel pressure regulator is intended to maintain a set base fuel pressure relative to the pressure in the intake manifold (via the hose connection). The pressure in the manifold opens further or closes further the fuel pressure regulator depending if you have a vacuum or postive pressure (boost). The vacuum opens the regulator further resulting in a decrease in fuel rail pressure and boost closes the fuel pressure regulator more resulting in an increase in fuel rail pressure.

Hope this helps

Cheers

Hopefully not too long.

The fuel pressure regulator is what controls the amount of fuel going into the engine.

One of my friends has killed an engine just because the fpr vacuum hosing split prior to a track day.

That's why I always change that particular hose on all my cars as soon as they look the slightest bit suspect. It's cheap insurance for like $5.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
    • Yeah mate, never miss it.
    • Any going to watch World Time Attack at SMSP this year?
    • Appreciate the correction on the "ground", that will make a huge difference to looking at this. That makes complete sense about AF70/AF71 which is what I had come down to being the issue, one of these. I'll have another look in the ignition wiring when I get a chance next week. I'll also make up a jumper wire for running that AF73 test.  ECU is fine, relay itself is fine, pump harness is fine and the pump itself is fine. I am going to upgrade the Walbro 255 anyway with a DW300 I have since I need to replace the fuel sender and I'm going to upgrade the FPR with my chasebays kit ready for new plenum/injectors/dbw, but I'll get this working first. That's why this is so frustrating. 
×
×
  • Create New...