Vacuum Tubing/3-way connectors/Valves

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The vacuum tubing used everywhere wears down over time. It absorbs oil and doesn't hold as much air pressure as it used to. Example:

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New (LEFT) vs Used (RIGHT) vacuum tubing

As you can easily see, the tubing on the right is twice as big, and it's oily, and spongy. Less effective!

I suggest you get a meter or two of this stuff and replace it where ever you can find it.

Places to replace it:

1. Engine, driver side, there is a lot of this stuff.

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2. ALSO the same thing can happen to the three and four way splitters in the engine. If they look/feel ineffective, change them.

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3. Under the front panel, under the ignition/steering/etc. Here you will find at least two at the ignition.

4. Doors have them too.

5. The HVAC system uses a few, two are under the noise encapsulation panels under your dash, in the center ish.

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I spy one!

6. Valves

There is TWO of these:

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And one of these:

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Cake to replace.

Once you've troubleshooted this, or want to try something else, go back to the Dieseling Index

or try these:

1. Door/Truck/Fuel Cap Unlock/Lock Diaphragms/Switches

2. Vacuum Tubing/3-way connectors/Valves

3. Shut-off Valve @ Injection

4. Shut-off Valve @ Ignition

5. A/C System Diaphragms

6. Vacuum Pump - Refurbishing

7. Replace Vacuum Pump