They are like the nerve endings of the vehicle. Remove both cables from the battery, then touch the negative test lead to the negative battery post, and the positive lead to the coolant in the radiator or coolant reservoir.Sensors provide the inputs the Powertrain Control Module (PCM) needs to make critical control decisions. You can use a voltmeter to check for electrolysis in the coolant. Replacing the pipes is recommended to halt the rusting problem.Įlectrolysis that eats through the heater core also can be caused by missing, loose or broken engine ground straps. Cleaning and flushing the system can get rid of the gunk, but it won’t stop the corrosion inside the steel pipes. This is often the result of coolant neglect. One common problem we’ve seen in high-mileage Taurus/Sable vehicles with the Duratec engine is coolant contamination caused by rust and corrosion in the coolant pipes that snake around the engine. TSB 02-22-1 covers diagnosis of the cam sensor and aligning the cam sensor with a special installation tool.
If you find a 1996-2003 Taurus or Sable with a rolling idle or surge problem, poor fuel economy, or codes P1336, P1309 or P0340, the cause may be a misaligned camshaft position sensor. The fix may require cleaning or replacing the MAF sensor, or using a smoke machine to find elusive vacuum leaks in the intake plumbing. The lean fuel condition is often caused by a dirty mass airflow sensor, vacuum leaks in the intake manifold or vacuum connections, or a defective DPFE sensor. P0171 and P0174 lean codes are common faults on many Ford, including the 3.0L Duratec. So if you need to replace a head, make sure you get correct side. The right and left heads are different on all the engines, and are identified by different part numbers. The most variation in these engines is found in the cylinder heads and front timing cover.
Mazda 6 p0171 and p0174 cracked#
If the big end of the rod is worn or stretched, though, the rod has to be replaced because cracked caps cannot be ground to resize the bearing opening.
Rod lengths and weights are all the same, and can be interchanged from one year to the next. The compression ratio is the same, so the newer pistons can be used in the older applications.Īll the Duratec engines use powder metal connecting rods with cracked (fracture-split) caps. Flat-top pistons with a slight dome are used without valve reliefs in the older 3.0L Duratec engines that do not have variable valve timing, but pistons with four valve reliefs are required for additional valve clearance in the newer versions with VVT. The cast iron liners in the aluminum block can be bored to oversize if the cylinders are worn or tapered. The 2000-’04 blocks use casting number XW4E-BA. Other than that, the 1999 and newer blocks are interchangeable. The following year, Ford revised the block casting slightly and reduced the size of the knock sensor threads from 12 mm to 8 mm.
Mazda 6 p0171 and p0174 install#
Install an old style head gasket on this engine and it will leak coolant. In 1999, Ford changed to a slightly different casting (XW4E) which has different coolant passages on the right side that require a different head gasket. The first-generation 3.0L Duratec blocks produced from 1996 through 1998 can be identified by the “F5DE” casting number on the engine block. Ford says it will continue making the 3.0L V6 for several more years with additional improvements to reduce emissions and improve fuel economy. An even larger 275 hp 3.7L Duratec V6 with a 95.5 mm bore is used in the 2008 Mazda CX-9 and Lincoln MKS, and 2009 Mazda 6. Though the 3.0L Duratec V6 has had a relatively long production run, its successor is the larger displacement 265 hp 3.5L Duratec V6, which powers the 2007 Ford Edge, Lincoln MKX and MKZ, and 2008 and later Taurus and Sable, and 2009 Ford Flex. The result is more advance (47°) and better fuel economy. The cam phaser generates its own internal pressure rather than relying on oil pump pressure to move the cams. On the 2009 Fusion, a new type of VVT system called “Cam Torque Actuated” (CTA) is used to advance cam timing. A Variable Valve Timing (VVT) with electronic throttle control for the 2003-’06 Lincoln LS, 2003-’06 Jaguar X-Type applications, 2006 Ford Fusion, Mercury Milan and Lincoln Zephyr, and 2009 Ford Escape.
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