Black and White Plugs behind TB and MAP Question

HoodStrype · 09-19-2005, 10:18 AM

Hey guys, my friend found a couple of plugs (something for fuel) behind the throttle body... two plugs, one black, one white. They look like part of the wiring harness. He has the same two on his, but on my car it had some kind of wierd extensions!?!? We can't figure this out- there was an extension about 6" long on each wire and they matched the plugs perfectly.

Anyway, I wonder also if I need my MAP sensor (I think- on the firewall left of the vacuum tree) hooked up to a vacuum line. My car has no egr or a/c if that has anything to do with it. Thanks!

Jeff Chambers · 09-19-2005, 11:22 AM

The extension were part of a recall in 90 & 91. Without the extensions, the harness was a tad too short and resulted in wires/pins pulling from the connectors as the engine moved on the mounts. The extensions effectively provided some strain relief. There should be a sticker on the fan shroud of your buddies car documenting the installation of the extensions as satisfying the voluntary recall.

Jeff Chambers · 09-19-2005, 11:27 AM

To answer the second part of your question, if the sensor has a barbed fitting that will accept a vacuum hose then it is ineed a MAP (manifold absolute pressure) sensor and should have a vacuum line attached. If the fitting location has a little loose vent cover where you think the vacuum line should be attached, then it is a BAP sensor (barometric absolute pressure) and should not have a vacuum line attached. The majority of mass air cars have a BAP and should not have the vacuum line attached. Check the vacuum routing diagram in the engine bay to determine actual routing.

HoodStrype · 09-19-2005, 03:06 PM

Thanx Jeff!

09-19-2005, 10:18 AM	#1
HoodStrype Rearview Mirror Haze Join Date: May 1999 Location: Huntsville, Alabama...a.k.a. "HuntsVegas" Posts: 387	Black and White Plugs behind TB and MAP Question Hey guys, my friend found a couple of plugs (something for fuel) behind the throttle body... two plugs, one black, one white. They look like part of the wiring harness. He has the same two on his, but on my car it had some kind of wierd extensions!?!? We can't figure this out- there was an extension about 6" long on each wire and they matched the plugs perfectly. Anyway, I wonder also if I need my MAP sensor (I think- on the firewall left of the vacuum tree) hooked up to a vacuum line. My car has no egr or a/c if that has anything to do with it. Thanks! __________________ 93 lx Notch 01 GT ...the epitome of Murphy's Law

09-19-2005, 11:22 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Black and White Plugs behind TB and MAP Question The extension were part of a recall in 90 & 91. Without the extensions, the harness was a tad too short and resulted in wires/pins pulling from the connectors as the engine moved on the mounts. The extensions effectively provided some strain relief. There should be a sticker on the fan shroud of your buddies car documenting the installation of the extensions as satisfying the voluntary recall. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

09-19-2005, 11:27 AM	#3
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Black and White Plugs behind TB and MAP Question To answer the second part of your question, if the sensor has a barbed fitting that will accept a vacuum hose then it is ineed a MAP (manifold absolute pressure) sensor and should have a vacuum line attached. If the fitting location has a little loose vent cover where you think the vacuum line should be attached, then it is a BAP sensor (barometric absolute pressure) and should not have a vacuum line attached. The majority of mass air cars have a BAP and should not have the vacuum line attached. Check the vacuum routing diagram in the engine bay to determine actual routing. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

09-19-2005, 03:06 PM	#4
HoodStrype Rearview Mirror Haze Join Date: May 1999 Location: Huntsville, Alabama...a.k.a. "HuntsVegas" Posts: 387	Re: Black and White Plugs behind TB and MAP Question Thanx Jeff! __________________ 93 lx Notch 01 GT ...the epitome of Murphy's Law