Hello. If you have found a loose harness, connector then it may be possible that they go to a component or feature that is not currently installed on the vehicle. You may be able to tell if this is the case by examining the connector or wires. If they appear to be dusty as a result of being unmoved, untouched, then it may be possible that they are simply an extra connector. There are also several relays and modules installed underneath the dash. These look like boxes with harnesses going to them, and can come in different colors and sizes. They will either control the function or power of different features or components of the vehicle. You may be able to identify the specific component by inspecting it for a part number and looking it up.
How to Identify and Fix Common car Problems ?
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The first generation 5.4L, produced from 1997 to 2004, has two valves per cylinder. It is relatively reliable, with only two major faults: excessive timing chain stretch, and spark plugs sometimes blowing out of the cylinder head.
The Ford 5.4 Triton has proven to be an impressive engine that delivers a good balance of performance and reliability. However, there are certain areas in which it can fall short. One of these areas concerns the timing chain, timing chain tensioner, and cam phasing system.
With 300 horsepower and 365 lb-ft of torque, the Triton 5.4L is one of the most reliable F150 engines. Minor problems were still present like crank angle sensor issues and the occasional spark plug broken off in the head, but few repairs were as expensive as the previous years.
Most of the most common problems developed with the 2004-2013 3 valve engine but some problems spanned all engine generations. The most popular issue but easiest to fix, is the ignition system. The 3 valve 5.4L Triton contains a coil-on-plug design.
The Ford 5.4 L Triton engine has been known to have problems with the fuel pump driver module. Due to it`s placement in the vehicle (usually at the rear – on or near the frame), the fuel pump driver module is exposed to the elements. Dirt, water, and salt can all build up over time and cause the module to fail.
TOM: For those who have Ford trucks from this era, the offending engines are the 3-valve 5.4-liter from 2004 to 2007, the 3-valve 4.6-liter from 2005 to 2007, and the 3-valve 6.8-liter from 2005 to 2007.
When Ford introduced the single overhead cam 5.4L 3V Modular V-8 in 2004 in the redesigned F-Series trucks and the 4.6L 3V in the all-new `05 Mustang GT, it was viewed as an upscale compromise between the 2V Modular and the mighty DOHC-4V Cobra and Mach 1 engines.
Ford SVT Lightning 5.4L engine with 380 hp (283 kW) and 310 ft-lb (610 Nm) of torque.
Even taking pre-clean and soak precautions, and working the plugs slowly, we managed to break five of the eight plugs and had to use a Lilse spark plug removal tool to complete the removal of the broken plug tips. The tool worked great, but total time to do the job on our engine was about four hours.
Does Ford still make the 5.4 engine? Yes, and no. The engine, which was first produced in 1997, was used in the F-series through 2010.
In theory, 5 valves per cylinder may offer larger valve area than 4-valver for better breathing. The smaller and lighter intake valves also enable the engine to rev higher without worrying of “valve floating”. The latter reason was especially crucial to high-revving superbike engines and racing motors.
Ford`s 5.4L V8 engine has also had some ongoing issues with its fuel pumps, particularly in the 2006 Ford F-150. One complaint on the NHTSA page was filed in 2017 and reports that the fuel pump control module became corroded, causing the engine on the truck to stall completely.
A well known problem with the Ford 5.4 3V engines is the dreaded `phaser rattle` This happens when the variable cam timing phasers can no longer be controlled by the ECU due to wear in the phaser or lack of oil pressure / volume being delivered to them.
The 5.4-liter V8 engine lasted from 1997 to 2010 in the Ford F-150. And although some versions are better than others, you should avoid the 3-valve V8.
Modular engines used in Ford trucks were marketed under the Triton name from 1997–2010 while the InTech name was used for a time at Lincoln and Mercury for vehicles equipped with DOHC versions of the engines.
Many factors can cause a spark plug to fail; from incorrect heat ranges to improper gapping, to chemical contamination. Yet 90% of spark plug damage claims are due to improper torque. Many factors can cause a spark plug to fail; from incorrect heat ranges to improper gapping, to chemical contamination.
Ford Expedition Powertrain
The early V8 engines feature two valves per cylinder, and the V8 engines in the later generations have three valves per cylinder. The most recent Expedition models are now powered by the 3.5-liter V6 EcoBoost engine, the most powerful and efficient engine to date.
The most reliable year of Ford Expedition in the first generation is the 2002 model year. According to CarComplaints, the 2002 Expedition has received only 400+ complaints and four recalls – a stark improvement over the previous models.
One of them was the GT500`s 5.4-liter supercharged V8. The advanced all-aluminum engine features dual overhead cams, forged pistons, and a roots-style supercharger from Eaton. It produces 550 horsepower and 510 lb-ft of torque.
all blocks them selves and heads are the same… On the heads there are two kinds… ROMEO and WINDSOR… the only difference is the valve covers…
that could mean you have engine damage as the 5.4L is an interference engine. You can have piston and valves that are damaged.
1998 F-Series Engine Specs
The big V8 engine for the F-150 the 5.4L Triton makes 235 hp @ 4,250 rpm and 330 lb-ft of torque @ 3,000 rpm.
One service issue technicians should be on the look out for is late-model Ford trucks (1997 to 2004 Ford F-Series, Expeditions and Excursions) that are reportedly blowing out spark plugs. The problem seems to occur most often on 5.4L Triton engines, but may also occur on other V6, V8 and V10 engines in these vehicles.
Does Ford still make the 5.4 engine? Yes, and no. The engine, which was first produced in 1997, was used in the F-series through 2010. However, it is still used in the E-Series vans the company still produces.