Vacuum hoses wrong!!!!!!

Post by **paul72** » Thu Jul 25, 2013 1:06 pm

Well if u take the pipes of theres no suction from the black box with the electric plug

bb1boy · Post by **bb1boy** » Thu Jul 25, 2013 1:37 pm

paul72 wrote:Well if u take the pipes of theres no suction from the black box with the electric plug

Maybe there is suction when the engine is under load or on over run, not just on tickover.. extend the pipe into the car, take it for a spin checking it all the way.

BMCC · Post by **BMCC** » Thu Jul 25, 2013 2:45 pm

Pull the plug and see if it throws a code? Could be a bit dangerous though! Or way less dangerously can you trace the wire back to the ECU and see what pin it connects to, what colour the wire is etc?

Post by **paul72** » Thu Jul 25, 2013 3:45 pm

Ill give it a try later wen i get home an let u know

Post by **Merlin** » Fri Jul 26, 2013 3:17 pm

I had a good look a t Vanzep's car last night. This valve does indeed sit in between the fuel pressure regulator and the intake manifold. There are no other hoses connected to it. We could see the EVAP purge valve on the firewall so this is deffo not it.

I would be tempted to disconnect it and see what happens.

Post by **ADS1** » Fri Jul 26, 2013 4:35 pm

Right, i have just been out for few hours , cleaning and pottering about on mine. And i have this valve, also connected between intake and fuel regulator.
But the electrical plug to it was disconnected!!! Not sure if it was disconnected by me when fitting my blue hoses, and forgot to recconect

. Anyway not had any cel codes thrown at all.
I have now reconnected the plug, and reset ecu. So see what difference, if any.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jul 27, 2013 10:09 am

I'll dig around later to see if I can find again where I found out about it being a fuel cut off valve

Post by **Vtecmec** » Sat Jul 27, 2013 10:40 am

wurlycorner wrote: I'll dig around later to see if I can find again where I found out about it being a fuel cut off valve

As the solenoid valves are basically on or off, that's all I can see it being too.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jul 27, 2013 12:22 pm

Can't find it on a quick look ffs

Found a Toyota document (god knows how that turned up in my search lol) that says Toyota fitted a solenoid valve here to reduce fuel pressure under some conditions (the solenoid valve vents the vacuum on the fuel pressure regulator, which is exactly how this thing is plumbed in on the JDM ludes)

Will keep searching...

andyconnolly · Post by **andyconnolly** » Mon May 05, 2014 8:14 pm

Anyone know the diameters of the hoses seen here ? gonna try get some from work and replace mine. preferably vacuum and radiator hoses