Installing Vacuum Blocks 84-93 T-1 thru T-4 - Page 16 - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #226 of 237 Old 08-22-2016, 08:21 PM Thread Starter
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

My suggestion would be to start with what the engine needs to run and once you know that is correct and the car will start and stay running and runs correctly then start running the lines to the emission controls.

1)IMO you should have the vacuum block screwed into the intake manifold rather than using a long piece of hose to connect it to the manifold, just another place to leak.

2)BARO SOLENOID
a)Vacuum Block to Top Port of Baro Solenoid
b)Baro Solenoid Middle Port to the Map Sensor
c)Bottom Port Remains Open

3)Vacuum Block to Fuel Pressure Regulator

That is all you need to have the car start and run.
Be sure all other ports on the vacuum block are plugged, disconnect all the lines from the fitting on the rear of the intake for the Booster, BOV and HVAC and plug the ports on the fitting.

If the car will still not start and run you have other issues that need to be addressed.

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post #227 of 237 Old 08-22-2016, 10:48 PM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

Jan, his is one of your best pieces of advice yet!!

Vacuum diagrams can be intimidating to understand but when you list the components that need a vacuum signal it may seem much more clear to many folks.

Thanks
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post #228 of 237 Old 03-02-2017, 06:20 PM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

the diagram confusing me.. iam not mechanic actually

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post #229 of 237 Old 08-25-2017, 02:57 PM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

I've been replacing various vacuum hoses in my 91 Dodge Shadow 2.5L turbo 1 and haven't been able to identify the 1-to-4 way splitter coming off of the intake manifold. I've been told that that specific hose is out of production, so I'd need ideas on how to hook up the hoses to maintain accuracy with the vacuum diagram.

Unfortunately, since I'm a new member I don't believe I can add a link or upload images, sorry.
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post #230 of 237 Old 08-25-2017, 06:49 PM Thread Starter
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

Quote:
Originally Posted by TurniptheLed View Post
I've been replacing various vacuum hoses in my 91 Dodge Shadow 2.5L turbo 1 and haven't been able to identify the 1-to-4 way splitter coming off of the intake manifold. I've been told that that specific hose is out of production, so I'd need ideas on how to hook up the hoses to maintain accuracy with the vacuum diagram.

Unfortunately, since I'm a new member I don't believe I can add a link or upload images, sorry.
Yes, the factory plastic vacuum harness is no longer available.
As this thread is titled, you will need to remove the factory vacuum harness and replace it with a Vacuum Block and Rubber Vacuum Line and Fittings.
You will need to reuse any Factory Orifices and Check Valves that may be in the vacuum system.
(Somebody posted about using bulk poly line that is the size of the factory line but I cannot find the post/thread so I have no idea where they bought it or how they attached it)

You can connect the vacuum block to the manifold vacuum port with a rubber hose or remove the factory vacuum port and use metal fittings.
From the vacuum block you need to run vacuum lines to the...
1)Fuel Pressure Regulator
2)Baro Solenoid
3)Purge Solenoid
4)Boost Gauge (if equipped)

The other lines are just a matter of running new line from point A to point B.

VACUUM BLOCK
Universal Vacuum Manifold Kits 6 Port 1/8 NPT Turbo Boost Block Manifold T8F7 | eBay

Installing Vacuum Blocks 84-93 T-1 thru T-4-91-turbo-1-vacuum.jpg

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post #231 of 237 Old 07-05-2018, 02:27 AM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

thanks for making this post.
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post #232 of 237 Old 10-30-2018, 12:51 AM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

My suggestion would be to start with what the engine needs to run and once you know that is correct and the car will start and stay running and runs correctly then start running the lines to the emission controls.

1)IMO you should have the vacuum block screwed into the intake manifold rather than using a long piece of hose to connect it to the manifold, just another place to leak.

2)BARO SOLENOID
a)Vacuum Block to Top Port of Baro Solenoid
b)Baro Solenoid Middle Port to the Map Sensor
c)Bottom Port Remains Open

3)Vacuum Block to Fuel Pressure Regulator

That is all you need to have the car start and run.
Be sure all other ports on the vacuum block are plugged, disconnect all the lines from the fitting on the rear of the intake for the Booster, BOV and HVAC and plug the ports on the fitting.

If the car will still not start and run you have other issues that need to be addressed.



This applies to a 85 T1? I think I have a vacuum issues causing my engine not to run on its own.
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post #233 of 237 Old 10-30-2018, 01:08 AM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

On my OEM vaccum block, we are assuming the order is
Purge, EGR, Wastegate, and MAP solenoids.

Which is the bleed? Which one do I hook up to for vacuum?
If I run a new Vacuum block to I need to keep this OEM block?
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post #234 of 237 Old 10-30-2018, 08:21 AM Thread Starter
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

Do you see where the lines are spliced in your second pic?
Splicing the smooth plastic lines into a rubber line is always a problem, it creates points of leakage, either with vacuum/boost or both.

I Googled and found our pic that was deleted.
Someone may have stated that this was not correct and if so maybe they will chime in with the corrections, but in the meantime...

Installing Vacuum Blocks 84-93 T-1 thru T-4-download.jpg
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post #235 of 237 Old 02-04-2019, 10:44 AM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

HI all ! I have read several pages (not all) of this ... I am very confident in redoing my vacuum lines thanks to the info you guys have provided. My 88 T1 has a air shut off valve in the air box with a vac line ran to the Throttle body WITHOUT a delay valve.... Where can i get a delay valve ? Or can a cap it off ? Car will be staying at stock boost level.
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post #236 of 237 Old 02-05-2019, 07:27 AM Thread Starter
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

Welcome To TD!!!

Mopar part # for the delay valve is 4324488.

They are available from two sellers on...
https://www.rearcounter.com/4324488-parts1007468.html

You can view the parts illustration in the Chrysler Parts Catalogs.(Post 41 has working links)

https://www.turbododge.com/forums/f4...-pdf-82-a.html

1988 Catalog, Group 14 Fuel, Page 547, Figure 14-500, Item 27
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post #237 of 237 Old 04-27-2019, 06:42 PM
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Re: Installing Vacuum Blocks 84-93 T-1 thru T-4

Cannot thank you enough for this thread.
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