93 Cobra Intake Install

[88scar50]

So I'm swapping my 88 stock intake for a 93 cobra one. The underside however has less ports that the stocker. What should I do with these connections?

 

[jrichker]

The only items on the car that require a dedicated vacuum port on the intake manifold are the fuel pressure regulator and the carbon canister fuel tank vent solenoid. Plug anything else to an available vacuum port.

Diagrams courtesy of Tmoss & Stang&2birds

Vacuum diagram 89-93 Mustangs

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring; http://www.veryuseful.com/mustang/tech/engine/ Everyone should bookmark this site.

94-95 Mustang wiring diagrams
http://www.veryuseful.com/mustang/tech/engine/#95-95Diagrams

Complete computer, actuator & sensor wiring diagram for 91-93 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

Complete computer, actuator & sensor wiring diagram for 88-91 Mass Air Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel, alternator, A/C and ignition wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

O2 sensor wiring harness
http://www.veryuseful.com/mustang/tech/engine/images/mustangO2Harness.gif

Vacuum diagram 89-93 Mustangs
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

HVAC vacuum diagram
http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif

TFI module differences & pin out
http://www.veryuseful.com/mustang/tech/engine/images/TFI_5.0_comparison.gif

Fuse box layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

Mustang 5.0 Lights and Radio schematic, by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxLights-Radio_diag.gif

87-92 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang87-92 PowerWindowWiring.gif

93 power window wiring
http://www.veryuseful.com/mustang/tech/engine/images/mustang93PowerWindows.gif

T5 Cutaway showing T5 internal parts
http://www.veryuseful.com/mustang/tech/engine/images/5_Speed_Cutaway_Illustrated.jpg

Visual comparison of the Ford Fuel Injectors, picture by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/Ford_Injector_Guide.jpg

Convertible top motor wiring http://www.veryuseful.com/mustang/tech/engine/images/mustang88VertTopMotorCkt.gif

Engine mounted fuel injector harness
http://www.veryuseful.com/mustang/tech/engine/images/mustangEngineHarness.gif tang/tech/engine/images/mustang88VertTopMotorCkt.gif

Location of the TPS, IAB, and the 10-pin connectors on a 5.0, picture by TMoss:
http://www.veryuseful.com/mustang/tech/engine/images/TPS_IAB_Pic.jpg

 

[OneWheelPeel]

Cap what you don't use.

 

[88scar50]

Sounds good. I found this online would somethin like this work? And if so, the only thing is the spot on this picture labeled "fitting included with kit" on mine has a nipple going both ways instead of one. Would I just cap one side?

 

[Mustang5L5]

Your setup has been modified. The double nipple fitting is from a stock HO intake and it look slike someone crimped the hell out of the vacuum fitting screwed into the intake.

The latest pic is how the ford cobra intake kit is plumbed up. I'd transfer your black vacuum fitting tube over, and plumb up the PCV system as close to the pic you pisted and cap the other end. All you need on the front of the intake is the port going to the charcoal canister, and that one is the port located near the throttle body on the front.

 

[88scar50]

Sounds good, this is the first one I've done so I just don't wanna mess anything up. Also I noticed that bent vacuum fitting and swapped it over. So just to be clear,

-Nipple on front goes to charcoal canister

-vac fittings:
*Fat one goes to firewall tree
*One to map sensor
*One to egr system

-Port next to triple vacuum fitting
*tied in with pcv connection, and connection to double nipple on back of intake and and cap off other side.

- port coming off throttle body goes to line coming out of oil fill.

 

[Mustang5L5]

-Nipple on front goes to charcoal canister

-vac fittings:
*Fat one goes to firewall tree
*One to map sensor
*One to egr system

-Port next to triple vacuum fitting
*tied in with pcv connection, and connection to double nipple on back of intake and and cap off other side.

- port coming off throttle body goes to line coming out of oil fill.

On the metal pipe fitting. Big one to vac tree. Little ones to EGR system and fuel pressure regulator.


1993 Cobra used a BAP sensors and not MAP, so you need to find somewhere to hook your 1988's MAP sensor to. On mine, I just connected it to an unused port on the vacuum tree. It works fine for me, but this may not be ideal. You may need to Tee into one part the other vacuum ports for the MAF sensor

 

[88scar50]

Would it work if I capped one of the double nipple ports and connected It the other end directly to the pcv, and instead of connecting the port next to metal vac pipe fitting in with it, just use that port to go straight to the map?

 

[Mustang5L5]

Prob is that lower port sometimes sees oil pooling up. It could potentially clog up the vacu line headed to the MAP and you'll get false readings and potential issues.

I'd just run it over to a spare port on the vacuum tree and call it a day.