Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Ford Mustang L4-140 2.3L SOHCFACTORY OEM SERVICE PROCEDURE
Spout Signal
PIP And SPOUT Signals:
The PIP signal is just one of many of the ECA inputs. The ECA takes all the information provided by the input sensors and creates a output signal called SPOUT (spark output). The spout signifies the engine operating condition electronically and is sent back to the TFI module, Fig. 26, for comparison with the PIP signal. The TFI module then uses both of these signals to fire the ignition coil at the proper timing intervals.
NOTE: When setting base timing, it is necessary to disconnect the SPOUT circuit. Failure to do so will result in an inaccurate base timing. There are two different types of SPOUT connectors used. The first type is a in-line connector and is simply disconnected for checking the timing. The second type has a shorting bar and the bar is removed from the connector to put the vehicle to base timing. Usally both connectors are located near the distributor refer to "COMPONENT LOCATION".
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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