Marquis L4-140 2.3L VIN A 1-bbl (1986)
Antitheft and Alarm Systems: Technical Service Bulletins
Antitheft Devices - Installation Precautions
Article No. 86-3-9
ANTI-THEFT DEVICES (AFTER MARKET) - INSTALLATION/ OPERATING PRECAUTIONS ON VEHICLES EQUIPPED WITH
ELECTRONIC ENGINE CONTROLS (EEC)
FORD 1978-86 ALL
LINCOLN-MERCURY 1978-86 ALL
LIGHT TRUCK 1981-86 ALL
NOTE:
This article is being republished in its entirety to include 1986 models.
Installation of "AfterMarket" anti-theft devices such as fuel shutoff and ignition defeating devices may cause no starts, hard starting, stalls, or damage to
vehicle components on Ford vehicles equipped with electronic engine controls. Possible damage caused by these devices can result from the following
situations:
1.
Fuel shutoff devices - Attempting to start the vehicle without disarming this device may cause the fuel injectors to run dry and overheat, which will
lead to failure of the injectors.
2.
Ignition defeating devices which ground the ignition/tachometer lead - Attempting to start the vehicle without disarming may result in ignition coil
failure.
Figure 13
In addition, care must be taken when routing underhood after market wiring (see Figure 13 for proper precautions), in order to avoid electromagnetic
interference with electronic engine controls. The following precautions must be observed:
