I deleted almost all of the rats nest and emissions.

but was going to run stock fuel pressure regulator for now. But many of the solenoids were already broken (mainly nipples broken off).
are each of the solenoids interchangeable with each other?

for the vacuum line, i thought i read that one of the ports on the Lower Intake Manifold (in the middle), connects to one port on the Solenoid. And the other nipple off the solenoid then connects to the Fuel Pressure regulator vacuum?

and the orange plug plugs into the solenoid, is the fuel pressure regulator reading?

 

rumor has it they are not all interchangeable. you can test the solenoid to determine what its function is

 

Not my pic but maybe it’s a help….

 

There are two types of the solenoid valve on the rack, and you can use either, you just need to see which way the air flow when its off.
This one goes from A to B when its off, and the other one goes the other way

 

All true. I would spend a few minutes testing whatever solenoid you plan on using with FDAuto's video he linked, it's worth being certain it's good or you're gonna have a bad time.

Dale

 

Thanks everyone! Looks like these rack solenoids are a bit different in routing than the YouTube video.

Rather, it seems to be like the shop diagram post above.

here is the diagram of how it should flow/ be connected?

the ohm test checked out good. Connected ground and power like the manual above post stated and it flowed from A to Vent like it should.
Didn’t do the pressure test,



how it’s suppose to be routed?

 

Its a filter, it just pulls off

 

yes.. I meant the routing of the air ways is as

j9fd3s posted above..

not how the video stated?

 

with the solenoid powered the pressure regulator needs to see the filtered vent, and the intake side should get blocked, so the regulator sees atmosphere (instead of vacuum), and fuel pressure goes up a little. the intake side needs to get blocked or its a vacuum leak.
with the solenoid off air should just pass from the intake to the regulator, so it can regulate

 

im sorry I don’t follow. Can you elaborate on this pic?


also separate question- but for the idle speed controller. The 2 wires that go to that plug came off. Does it matter in which orientation it goes in or no?
Thank you

 

with the solenoid unplugged the air needs to go from the intake to the FPR, simple right?

if you power the solenoid one port will pass to the little filter, right? when its on the FPR side needs to go to the filter

 

The 2 wires for the ISC - polarity doesn't matter.

Dale

 

thanks dale!