[Sea-J]

Has anyone relocated their vacuum switching valve from the unearthly location on the back of the block? 5sfe.
Geesh, those engineers certainly didn't think of service when designing that portion.
I'm putting all new vacuum hoses on and going to relocate their positions to something more manageable and visible. Wondering if there was some actual reason for that stupid position that is next to impossible to get to unless you have really skinny arms or want to remove the drive axle passenger side.
I managed to successfully remove the electrical connection plug and unbolted the two ground wires that were also located in the area. Ordered a new valve and thinking of mounting it on the firewall and relocating the ground wires somewhere topside.
Any opinions??

 

[Sea-J]

For those who might need a vacuum hose routing picture here is one of many. Seems there are very different versions depending on what engine, what accessories etc.
This is for my 5sfe, automatic, air, vacuum cruise.

 

[sefiro]

Yep, it's for the EGR control that is located just avbove it.

BTW, vacuum hoses at the local parta stores are the wrong diameter. I got the right size from volkswagon where they could sell me 10'. Their hose has a braided surface to aid in antiabraision.

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[Sea-J]

I did pick up 15' from AutoZone, took a piece of the old one with me. Its double thick wall to prevent collapse and we did measure the inside dia. Napa and Bumper to Bumper did not have the right size. The old hose on the back side of the engine was so soaked with oil and grease that it was swollen and loose, just a slight tug and they fell off the vsv. Probably leaking.
Funny aside, it did run without any vacuum lines connected, chugged, spit, sputtered when I drove it on the ramps.

 

[sefiro]

Leaky valve cover is the cause of the soaked.hoses on the backside.

As these are the egr valve control, then-
a) if the im to vsv hose is leaking, you would get higher rpm or idle hunt at idle
b) if vsv to egr hose is leaking, then you would not nurture anything as vacuum is only supplied at the 2k-3k to range (when the the is opened). But at that rpm, the ecu would have compensated in a way that would not have been noticed.

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[Sea-J]

Hope you nailed it. the valve cover gasket was changed when I first got the "project" two years ago but never cleaned up the mess in the back. Last week I field engineered a new nozzle for my high-pressure gun to fit in those tight spaces. The purpose for changing the hoses was because of a high idle that could not be controlled at the throttle body AND over 3800 rpm she would buck and snort. Plagued me for two years now but since it's a summer driver I just let it go. Soon as the snow melts and roads dry I'll try again.