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Ford 4.6 and 5.4 Fuel Injection Harnesses


Well-Known Member
Early Ford 4.6 V-8 Modular Engine: This engine was introduced in the 1991 big passenger cars and the 1993 Mark VIII. This is Ford's new modular design engine which can utilize some of the same parts to create a lower horsepower engine used in other Ford models. The 4.6 engine in the Mark VIII utilizes a thirty two valve, double over head cam design to create 280 horsepower while the 4.6 in other Ford models is a single overhead cam engine that produces 205 horsepower. The Mark VIII engine has intake manifold runner control solenoids which operate plates which are closed below 3000 RPM so the engine is running on two valves per cylinder. With no air delivered to the secondary intake valves, economy and emissions are improved at low RPM. Above 3000 the plates open increasing air delivered to each cylinder for more power on demand. The 4.6 engine has two ignition coils with each coil firing four cylinders. Depending on the year, the AOD, AODE and 4R70W transmissions were used behind this engine.

Mustang 4.6 Modular (2V and 4V Cobra) Engine: The Mustang first saw the 4.6 modular motor in 1996. Although it is very similar to the 4V Mark VIII, this engine is calibrated differently and the computer has advanced anti-theft. As a result, we will need to reprogram your ECM to remove the anti-theft but while we are at it we can modify the ECM for aftermarket fuel pump and electric fan use and delete control of selected emission controls (if your local laws allow). We can supply a harness for the 2 valve and 4 valve, automatic or 5/6 speed. Please call or e-mail us for more information.

Other/Late Ford 4.6 and 5.4 V8 Modular Engine: As with the above Mustang 4.6, we can wire all late model 4.6 and 5.4 engines 1999-2003. We will have to reprogram your ECM. See below.

The early 4.6's had a coil pack for each bank of cylinders but with the 1997 passenger cars and the 1999 Mustang, Ford went to coil on plug (COP). The Detail Zone can wire up all late model 4.6 and 5.4 engines. If you have questions please give us a call or e-mail us.

visit The Detail Zone


Active Member
waking up this thread.. Does it allow you to connect the AC? read the instructions.. I dont see anything in there about the 2 connections to the ac compressor.