Filed Under (Ford) by admin on 27-01-2011
Some 2005-2007 F-Super Duty, 2005-2008 E-Series and 2005 Excursion vehicles equipped with a 6.0L diesel engine may exhibit a hard start / long crank or no start condition due to low injection control pressure (ICP). ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE NOTE A FLOW CHART OF THIS PROCEDURE CAN BE FOUND AT THE END OF THIS ARTICLE. (FIGURES 13-16) NOTE THE LOW PRESSURE OIL SYSTEM MUST BE WORKING PROPERLY IN ORDER FOR THE HIGH PRESSURE OIL SYSTEM TO BUILD ICP PRESSURE. THIS INCLUDES ADEQUATE BASE ENGINE OIL SUPPLY PRESSURE AND GOOD QUALITY PROPERLY MAINTAINED OIL. THIS MUST BE VALIDATED BEFORE CONTINUING WITH THIS PROCEDURE. 1. Install the Integrated Diagnostic System (IDS) scan tool, check ICP voltage key on engine off (KOEO) for bias: If voltage is not between 0.15 V and 0.35 V refer to Powertrain Controls/Emissions Diagnosis (PC/ED), and do not continue with this procedure. 2. Check for diagnostic trouble codes (DTCs). a. If DTC P2623 is present go to pinpoint test R in PC/ED before continuing to the ICP Graph Comparison Test.
Filed Under (Toyota) by admin on 14-10-2010
In some cases, owners of 2000 – 2002 model year Celica GTS vehicles equipped with the 2ZZ–GE engine may complain of an intermittent slight loss of power and/or variable lift function at engine speeds over 6,000 rpm under high load. This can be caused if the bolt securing the rocker shaft separates, allowing the shaft to rotate in its bore. This rotation, when it occurs, can cause misalignment of the oil feed passages to the rocker shafts, resulting in a lack of variable lift operation and low power at higher engine rpm. Repair Procedure 1. Remove Valve Cover A. Disconnect the negative and then the positive battery terminals. B. Remove the battery tie–down bracket and battery. C. Remove the 4 bolts and No. 2 cylinder head cover. (Figure 1.) D. Remove the ignition coils. (Figure 2.) E. Remove the wiring harness and protector from cylinder head cover. (Figure 3.) F. Disconnect the 2 PCV hoses from the cylinder head cover. (Figure 4.) G. Remove drive belt. a. Turn the drive belt tensioner slowly clockwise and loosen it. Then, remove the drive belt and replace the drive belt tensioner slowly and carefully. (Figure 5.) H. Remove the 2 nuts, 1 bolt and disconnect the No. 3 ventilation hose from the No. 1 ventilation pipe. (Figure 6.) I. Remove the No. 1 ventilation pipe and gasket. J. Remove the 9 bolts, pull back the wire harness protector, and remove the cylinder head cover and gasket. (Figure 7.) K. Remove the O–ring from the cylinder head cover oil supply pipe. (Figure 8.) 2. Set No. 1 cylinder to TDC/compression. A. Turn the crankshaft pulley, and align its groove with timing mark “0” of the timing chain cover. (Figure 9.) B. Check that the point marks of the camshaft timing sprockets are in a straight line on the timing chain cover surface with the exhaust cam dot set one tooth above as shown in Figure 10. If not, turn the crankshaft one revolution (360°) and align the marks as explained above.