DTC 211, 212 & 213; ping, rough idle, missing at speed; "...Misfiring, Rough Idle, Surge, & Ping-Knock Symptoms, due to a Magnetized Shutter Wheel, (Bronco & all Fords w/EEC IV & TFI); "...Inside the TFI distributor is a Hall-Effect sensor that provides an RPM and POSITION signal to the Ignition module and ECM for fuel and ignition control. Mounted to the distributor shaft is a "shutter-wheel" that passes through the Hall-Effect sensor. The slots or windows cut in the shutter-wheel are what makes the Hall-Effect sensor switch on/off to create the signal it sends out. The shutter-wheel is supposed to be a piece of "dead" steel but can become magnetized. A magnetized wheel can cause very erratic operation of the Hall-Effect and resulting erratic output signal. The Test: There are a couple of ways to check for this condition. One is to simply pull off the distributor cap and see if something steel will "stick" to the shutter-wheel. Make sure that whatever you are using to check the wheel with isn't magnetized itself. A more accurate method would be to watch the wave-form on the "SPOUT" wire with a Vantage or Lab-Scope. The SPOUT is the wire with the connector in it that you unplug to set ignition timing. Monitor the wave-pattern on the SPOUT with the timing-connector in. If there is anything erratic about the wave-form, unplug the timing connector and re-check the wave-form. If the pattern "cleans up" all of a sudden, chances are good that you have a magnetized shutter-wheel. The Fix: Most shutter-wheels can be removed from the distributor shaft with a couple of screws. Everybody seems to have their own way of de-magnetizing the wheels but good success has been had with bulk audio-tape erasers or by placing the wheel in an engine parts cleaning oven and baking it. That last one sounds weird but it works..."
Source: by snapon.com via archive.org and miesk5 at FSB
Hesitation, Stumble, Stall, Miss, No Start, No Spark and/or Diagnostic Trouble Code (DTC) 211 TSB 95-15-11 for 93-95 (Shorts in Profile Ignition Pickup (PIP) & Spark Output (SPOUT)); "..The symptoms may occur during any drive mode or at idle. These concerns may be caused by the shielding drain wire (Circuit 48.) cutting through the insulation of, and shorting to, the Profile Ignition Pickup (PIP) wire (Circuit 395) or the spark output (SPOUT) wire (Circuit 929) near the Powertrain Control Module (PCM) 60-pin connector. A protruding wire from Splice 145 may also cause the same concern as the wire strand shorts to the PIP, SPOUT, or the foil wrap surrounding the drain wire..."
Wiring Diagram in a 95
Source: by SeattleFSB (Seattle FSB) at
1990 Ford Bronco 1995 Bronco EVTM picture | SuperMotors.net
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More in the TSB;''
http://ww2.justanswer.com/uploads/b...15-11_Wires_shorting_near_ignition_module.pdf
SEE LOCATION DIAGRAM
Vehicles may exhibit various driveability symptoms, such as no start, no spark, hesitation/stumble/stall/miss and/or Diagnostic Trouble Code (DTC) 211. The symptoms may occur during any drive mode or at idle. These concerns may be caused by the shielding drain wire (Circuit 48.) cutting through the insulation of, and shorting to, the Profile Ignition Pickup (PIP) wire (Circuit 395) or the spark output (SPOUT) wire (Circuit 929) near the Powertrain Control Module (PCM) 60-pin connector. A protruding wire from Splice 145 may also cause the same concern as the wire strand shorts to the PIP, SPOUT, or the foil wrap surrounding the drain wire.
ACTION:
Inspect PIP - Circuit 395 (GY/O), Ignition Ground (IGN GND) - Circuit 259 (O/R), and SPOUT - Circuit 929 (PK) for possible cut insulation from Circuit 48. Also, inspect Splice 145 - Circuit 395 (GY/O) for stray wire strands. If wire insulation is cut, exposing copper wire, repair cut insulation with 3M Mastic Tape. Refer to the following procedure for service details.
SERVICE PROCEDURE
1. Disconnect battery ground cable.
2. If vehicle has the speed control option, remove the speed control servo bracket and position it out of the way for improved access.
3. Disconnect the connector at the Ignition Control Module (ICM - formerly TFI).
4. Unbolt the 60-pin connector from the PCM and pull the wiring up to work on.
5. Remove the 1" (25.4mm) diameter convoluted tubing from the wiring assembly. The date code tag will remain taped to the convoluted tubing.
6. Remove/cut the tape of the wiring assembly. Work toward the the ICM connector (pull back convoluted tubing as needed).
7. Unravel aluminum foil tape and electrical drain wire (Circuit 48.) from main bundle, exposing the junction or "Y" splice between the ICM tapeout and the PCM tapeout. Be careful with the foil wrap because it will be reused.
NOTE: THE FOIL WRAP LENGTH WILL BE ABOUT 5" (127mm) BEYOND THE "Y" BRANCH. THE END WILL BE TOWARD THE ICM CONNECTOR.
8. After the foil wrap is removed, look for the three (3) "grouped" wires in question at the "Y" splice. The three (3) wires are: PIP - Circuit 395 (GY/O), IGN GND - Circuit 259 (O/R), and SPOUT - Circuit 929 (PK).
9. Locate the (bare) electrical drain wire. Wire end is toward the ICM connector, again, about 5" (127mm) from the "Y" splice. Unravel wire from the top (ICM) end and down to the area where the bare wire makes contact with the three (3) wires mentioned above.
10. Inspect for any damage to the insulation of the three (3) wires in question. If wire insulation is cut, exposing copper wire, repair cut insulation with 3M Electrical Moisture Sealant-Mastic Tape (3M Part No. 054007-06147).
11. Inspect Splice 145 - Circuit 395 (GY/O) for stray wire strands (Figure 3). If stray wire is found, apply pressure on the wire with pliers to bend the wire down and wrap the splice with three (3) layers of flame retardant vinyl tape, or equivalent, to ensure the wire does not make contact with other wires or the foil wrap.
12. Carefully rewrap the bare electrical drain wire and foil. Work backward, toward the ICM connector end. Tape end of foil wrap to secure.
13. Retape worked area securely (between PCM and ICM connectors) with flame retardant vinyl tape, or equivalent.
14. Reinstall all convoluted tubing and tape ends of tubing to the tubing with flame retardant vinyl tape, or equivalent.
15. Reinstall PCM connector to the PCM.
16. Reinstall the ICM connector.
17. Reinstall the speed control servo bracket (two bolts) if applicable, and tighten bolts to 15-18 N-m (11-13 lb-ft).
18. Reconnect battery ground cable.
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