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Posted on Jan 02, 2017
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Jun 20, 2017 | 1999 Ford Contour
Intake Camshaft Position Timing - Over-******** (Bank 1)
Camshaft timing improperly set.Continuous oil flow to the VCT piston chamber.VCT solenoid valve stuck open.Camshaft advance mechanism binding (VCT unit).
Nov 11, 2012 | 2001 Ford Taurus
A P0012 DTC trouble code may be caused by one or more of the following:
- Incorrect camshaft timing
- Wiring problems (harness/wiring) in intake timing control valve control solenoid system
- Continuous oil flow to VCT piston chamber
- Failed timing valve control solenoid (stuck open)
On Ford, the VCT solenoid is located at top of cylinder head underneath the valve cover and goes around one camshaft. You will need to remove the valve cover, the timing cover, then remove the timing belt, the camshaft sprockets, and finally the camshafts to remove the vct solenoid as it goes around the camshaft. You can use 2001-2003 models with same engine.
VCT or Variable Cam Timing solenoid is a device used in modern engines to change camshaft position timing in relevance to engine speed and engine timing allowing the engine to produce more horsepower without adding excessive overlap to the camshaft design.
The way the VCT Solenoid works is as follows:
The VCT solenoid works with oil pressure, it receives a signal from the ECM when the camshaft needs to be rotated either in the advanced mode or ******** mode depending on engine load and speed.The VCT solenoid is able to accomplish that by altering the oil flow in the passages that lead to the cam phaser(s), there are passages to advance the valve timing ( open the valves earlier), and passages that direct the oil to ****** the valve timing ( open them later)
The purpose of the VCT or Variable Cam Timing system is to allow the engine to move larger volumes of air in and out of the cylinders to generate maximum horsepower.
Vehicles with DOHC ( Dual Overhead Cam ) engines usually have two VCT solenoids mounted in each cylinder head, one for each camshaft, allowing the Engine Control Computer to activate each VCT timing mechanism in each Camshaft separately.
NOTE: The Cam phaser is mounted on the front of the camshaft(s) it is driven by the engine's timing chain or timing belt depending on the engine's design.
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Jun 20, 2012 | Cars & Trucks
Aug 09, 2011 | 2002 Jaguar S-Type
Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.
On the 3 liter engine, the thermostat is at the end of the upper radiator hose.
On the DOHC engines, it is at the end of the lower radiator hose.
If you have the 3.4 liter DOCH engine, you have to take the battery, power box, and battery tray out to get at it.
Nov 14, 2010 | 1999 Ford Taurus
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Oct 02, 2009 | 1999 Ford Contour
Dec 17, 2017 | Cars & Trucks
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