TAD/TAB One is Missing & Back to the Codes

[RR-Texas]

OK I have been sorting through all the info that has been shared on my 8 codes and it had been doing OK till today! I knew I still had issues but since re-running the codes and getting different ones then when the auto parts checked, along with letting it warm up properly it made it through the holidays just fine. Now the original 8 codes are back and it runs worse, it seems to want to die almost anytime you come off the accelarator even a little?

Got to checking some images of different components and locations and I do not seem to have one of the above sensors, I assume it is the TAB as that is the spot that is vacant on on the bracket. While I do not think this is the cause of my issues as the truck as been fine for the first 3 months I have owned it, the 5.8 is a replacement engine as the VIN shows it to have come with the 5.0 so who knows what has gone on?

 

[miesk5]

yo RR,

I forget what the codes were;

Look for a loose vacuum line in the TAB and TAD as well as Coil area; that could cause the stall or idle issues

Part Numbers

Should be service numbers E7TZ 9H465-A and E7TZ 9H465-B For part numers of major sensors & PCM see;

Vehicle Emission Control Information (VECI) Decal; Contains Vacuum Diagram & Calibration Parts List for 88 & UP. On-Line for Free at Ford. Click "Quick Guides" in left panel; Scroll to & CLICK VECI Labels "Provides Vehicle Emission Control Information (VECI) and a related calibration parts list." Enter applicable info (need to know your Calibration number (also called catch code) from your B-pillar sticker; since engine was swapped, just pick out any cal #). Vacuum Diagram is the same as the one on the core support or hood or air filter cover. Suggest Right Clicking this Hot Link & Open in New Window

Source: by Ford at http://www.motorcraftservice.com

Location pic in a 90 5.8



Source: by SeattleFSB (Seattle FSB

And this is by Charlie Probst; He wrote Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993;



the complete book is over 85MB pdf and can be downloaded @ http://www.yunost.ru/docs/Ford-injectors-book/Book.pdf

Scroll Down on First Page, Click on each Section, then on next page, click on the pdf file

 

[RR-Texas]

Replaced the EGR valve, position sensor and the EGR sensor and it has been running fine again. I still don't know what happened to the TAB sensor. That was last Thursday, I actually had to wait for the auto parts to open as it was dying every time I lifted, funny thing was it ran fine after I bought the parts? Still need to run the codes again. A guy I work with mentioned checking and cleaning some vacuum ports on the throttle body that some times get clogged? I need to save the pdf info on my laptop

 

[Markusfarkuscarcass]

Hi there everyone...I'm a newbie but I might have a little wisdom.  My 89 has the P58 crate motor from Ford Racing (still just a stock 95 5.8 Windsor) but It also came without the TAD solenoid on the bracket.  If you reach you hand behind the motor and wrap your hand around the TAD, mine has no place to attach a vacuum line.  I'm waiting for a vacuum & vapor hose diagram form Ford.  My Bronco passes CA tailpipe emissions easily but after 10 years they finally figured out it wan't a 302 so now BAR  won't pass me on the "visual" inspection...I'm in a fix.

MFC

 

[miesk5]

yo MARK, WELCOME!

Did you have to change the PCM too to the 95 5.8 Calibration Code?

Location pic from a 95 F250 5.8 in an 88; "...TAD/TAB Solenoid located towards back. both connectors are slightly different so once again only plug into one place..."


Source: by Travis L (kemicalburns) at SuperMotors.net

Vehicle Emission Control Information (VECI) Decal, Vacuum Diagrams & Calibration Parts List for 88 & UP.
On-Line for Free at Ford.
Click "Quick Guides" in left panel;
Scroll to & CLICK VECI Labels "Provides Vehicle Emission Control Information (VECI) and a related calibration parts list."
Enter applicable info (need to know your Calibration number from your B-pillar sticker).

Vacuum Diagram is the same as the one on the core support or hood or air filter cover.
Source: by Ford @ http://www.motorcraftservice.com

as an example,CALIBRATION: 4-76C-R10  shows;

VALVE ASSY., (Thermactor Air Control Solenoid Vacuum) E7TE 9H465-AA E7TZ 9H465-A




 

Vacuum Line Acronyms & Color Codes; EMISSION: Red = Main vacuum; Green = EGR function; Orange = Heat control Valve (exhaust & intake) (AKA heat riser but more complex); Yellow = from the TAD Solenoid (driver's side Forward Solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold (Distributor Advance in Carbureted Engines); White = EGR vacuum (source); Black = Mainly used for the Evaporative emissions control; Black = Thermactor ACV or Diverter valve; Blue = Throttle Kicker control; Pink = from the TAB Solenoid (driver's side rear solenoid) to the bottom of the Thermactor Air Bypass Valve (TAB or BPV/AIR Bypass (AIRB) valve); ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve (AIR Bypass (AIRB) and AIR Diverter (AIRD) valve combinations); MAN VAC is Manifold Vacuum; FPR is Fuel Pressure Regulator; EGR is Exhaust Gas Re-circulation Valve SOL V: Thermactor Air Diverter (TAD) Solenoid (SOL V) (AIRD) & Thermactor Air Bypass (TAB) Solenoid; ; EVR is EGR Vacuum Regulator; VRESER is the Vacuum Reservoir Can (Tank); V REST on later years is Vapor Valve (Roll-Over @ Gas tank); V REST on earlier years such as 78/79 & SEABRONC's 83 is a Vacuum Restictor/Delay Valve, it restricts vacuum for a certain amount of time, on most engines a vacuum line from the carburetor base runs to a T & then to V REST to the distributor; Carbon Can is Carbon Canister (Charcoal Canister, Vapor Canister, Evaporative Emission (EVAP) Canister); MAP is Manifold Absolute Pressure Sensor; AIR BPV is the AIR Bypass (AIRB) Valve, also called the TAB (Thermactor Air Bypass) Valve; CPRV is Canister Purge Solenoid Valve/ Canister Purge Solenoid (CANP); VCKV is Vacuum Check Valve; CAT is catalytic converter; ENG is engine; PCV is Positive Crankcase Ventilation Valve. HVAC in 92-96; Black = from engine source to vacuum check valve & to vacuum reservoir tank & to Control Panel; White = actuates the Outside/Recirc air door two-position vacuum control motor; Blue = Mix (actuates the FLOOR/PANEL air door two-position vacuum control motor); Red = Floor Flow & Yellow = Panel, (actuate the FLOOR/DEFROST three-position air vacuum control motor). READ MORE
Source: by Seabronc (Rosie, Fred W), Seattle FSB & miesk5 at Ford Bronco Zone Forums