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The Ford LTD was initially given a variety of V8 engines ranging from 4.7L to 7.0L and features a wheelbase of 119 in (3,023 mm). It has a padded steering wheel center hub, non-protruding instrument panel knobs, and a dual-circuit brake master cylinder, as well as four-way hazard flashers, and front outboard shoulder belt mounting points, which were improved to comply with federally-mandated safety regulations. In 1968, the model received a major redesign, with the wheelbase of this full-size Ford sedan extended to 121 inches. As for the engines, the Ford LTD is powered by a 302 CID V8, while the most popular choice was the 351 CID edition. The third-generation products were introduced in 1978 and were classified as 2 or 4-door sedans or 5-door station wagons and the engines included a small-block 302 5.0L V8 as standard and a 351 5.8L as optional. The enlargement of its body also led to a bigger interior and trunk space. The fourth generation was designed as a four-door sedan or a five-door station wagon, and four types of engines were available in different model years. The transmissions included a 4-speed manual, 3-speed C5 automatic, and a 4-speed AOD automatic, and in 1984, the parts were revised, including a new grille, as well as a federally-mandated CHMSL (center brake lamp) added in the next year.
Ford LTD vehicles, spanning various models and production years, have been plagued by three predominant issues: engine stalling at stops, malfunctioning passenger headlights, and an alarming stalling while driving due to ignition system complications. To start, many owners have lamented about their engines stalling, particularly when coming to a stop. This unsettling phenomenon manifests primarily during city driving, with the engine RPM, typically between 700-800, dropping suddenly to around 500 before stabilizing. Notably, the engine's vulnerability is amplified when its temperature is below 200 degrees and the air conditioning is active. Some have pointed to the fuel filler pipe as the potential cause, with dealers confirming the suspicion, especially when the fuel level ranges between 1/4 and 1/2 tank. Addressing this entails replacing the fuel filler pipe, necessitating the removal of the right front fender. Pertinently, an error code, P0457, sometimes associated with this issue, occasionally triggers the check engine light. The '85 Ford LTD model specifically presented challenges with stalling at traffic lights, even after attempts to adjust the idling. Expert mechanics deduced a possible vacuum leak as the culprit, leading to a lean condition during idling, and recommend a meticulous inspection of vacuum hoses, especially those associated with the carburetor and at the engine's rear. Meanwhile, the 2005 Ford Focus ZX3 2.0L SFI DOHC 4cyl owners, approaching 76,500 miles, faced analogous stalling issues. Remedial efforts like replacing the Idle Air Control Valve, running the AC to elevate the RPMs, and shifting to neutral when braking were explored. An enduring check engine light revealed an error showing engine bank 2 running lean. Proposed solutions range from examining the catalytic converters for blockages, inspecting for vacuum or intake leaks, particularly between the MAF and throttle body, contemplating an EGR valve delete, to resetting the vehicle by disconnecting the battery, thus allowing the ECU to recalibrate idle speed. The second notable issue centers on the LED-equipped Ford LTD's passenger headlight, which, after encountering road debris and subsequent exposure to rain, ceased functioning. Replacement of the compromised headlight assembly did not reinstate its operation. The car's electrical layout, lacking discernible fuses dedicated to headlights, compounded the mystery, although some speculate individual fuses might control each headlight. Remedies proposed involve executing a hard reset of the car's modules and exploring potential grounding issues, stressing a comprehensive diagnostic check of the Ford LTD's lighting system. Lastly, the 1979 Ford LTD and models from 1983 to 1995 have showcased distressing stalling tendencies while driving, attributed mainly to their ignition components. The 1979 model's deep-dive revealed a likely malfunction in a vague "module", later identified as the ignition module, infamous for its undependability. Models spanning 1983-1995 were diagnosed with defective Thick Film Ignition (TFI) modules. Their Achilles heel: overheating. When the TFI module temperature overshoots 257 degrees Fahrenheit, it malfunctions, causing the vehicle to stall. Even after cooling, the risk of re-stalling looms if the module overheats again. An unsettling revelation emerged that Ford, despite cognizance of this design flaw, opted for cost-saving by placing the TFI on the distributor, an exceptionally hot area, leading to the sale of over 13 million replacement modules. While the affected continued seeking assurances before incurring replacement costs, Ford strategically minimized the problem's severity, sidestepping regulatory scrutiny for extended periods.
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