4runner_guy

Like what the title says. I was in the process of putting everything back in my heater core and came close to a near finish when I decided to lean a bit of my body weight from my palm on the black cylinder object and broke it in half. So now I hear a whistling noise from the engine and also noticed that I dropped in gas miles too. I was averaging 200-220 to the tank but now getting 170-180 to the tank? Could this be a problem as to why it is affecting it? Any help would be great.
Pics were samples from 4crawler website.

toyota4x4907

WOW!! 200 MPG?!

I know, you mean miles per tank....

If that is the same Vacuum Switching Valve that you broke, then that would be the fuel pressure regulator VSV.

4runner_guy

Lol! I got a little carried away typing! Thanks, already made the correction. So it's called the fuel pressure regulator huh? I'll see if I can get one from ebay or maybe if I get lucky, at the local junk yard from either another truck or celica. Thanks for the info!

xxxtreme22r

it's not the regulator itself, it's the vacuum control for it, which is called a VSV (vacuum switching valve.)

If I knew the year, I'd be able to get a part number for you, but those things aren't cheap. IIRC the part number should actually be stamped on it as well, but might be hard to read.

toyota4x4907

Yeah, its the FPR VSV, not the regulator itself.

4runner_guy

It's an 88' runner EFI. I know that they aren't cheap. That's why I'm going to see if they have some at the local yards. My dad has his 87 Pickup...maybe I can pull it off his temporary until I get a replacement! Are there other vehicles (besides the celica) that fit in the same engine specs that I should be aware of in case I cannot find it in any trucks?

xxxtreme22r

I don't know when they changed, but make sure it's the same part number. I think there was several different ones.

4runner_guy

I'll make sure that I check for that. Too bad it's pouring here in Fresno so I would have to hold off until it dries up. I'll just pull off the VSV from my dad's truck since it's inoperable at the mean time. Thanks guys for all the help.

shaeff

Scrapyard will sell you one for a couple bux. They don't usually fail, but you can verify that with a 9v battery and a pigtail of wire (cut the wire from the engine harness, strip it...)

xxxtreme22r

they will if you lay on them and break off the vacuum connectors like he did.

4runner_guy

That's good to know, I'll make sure to try that in case I find an abundance of them! Lol.

Hey, be nice, it was a pure, honest, and noob accident!

xxxtreme22r

heh don't feel bad, I did the same thing to my 3 way vacuum port on the intake.

mr toytech

when that valve opens it creates a vaccum leak to idle up the motor. the round part that you broke off is nothing but a filter for the air being sucked in.

myyota

You can eliminate that part and run the vacuum line from the fuel presure regulator directly to the vacuum port on the intake manifold, that`s how i have my fuel presure regulator hooked up and it works just fine.

shaeff

The fuel pressure up VSV is used to help hot starts (mostly summer time) by using atmospheric pressure (rather than manifold pressure) to allow a higher start-up fuel pressure. By allowing higher fuel pressure at start-up, it helps prevent vapor-lock of the fuel rail/boiling of the fuel in the rail, which causes hard starts in hot temperatures.

If you live in a hot climate, I'd leave it there or replace if broken. If you live in cooler area it most likely won't be an issue for you.

Sl3DN3CKR69

I broke the same one off on my intake. Is it going to have a huge affect on performance or anything else if i dont replace it right away?