1991 isuzu amigo high idle condition
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Filed Under (Isuzu) by admin on 13-11-2010
high/erratic idle and/or the MIL light on. In some cases, vacuum leak noise may be heard as well. There may be poor contact or loss of contact at various main ground points or electrical connections. Power steering pressure switch may be shorted with debris. Inlet manifold gasket may be leaking. Broadcast code and calibration part number may need to be updated. To correct this condition, follow the procedures outlined in this bulletin to determine proper diagnosing, inspection and correction of ground contact points for proper electrical contact, power steering pressure switch cleaning or replacement and power steering system flush, replacement of inlet manifold gasket, and/or PCM reprogramming. SERVICE PROCEDURE Please refer to the appropriate workshop manual for the correct diagnosing procedure and/or follow the service procedures outlined in this bulletin for the vehicle being serviced. 1. Inspect main ground points (refer to SB99-04-S001 for more information). P6 ground point-body [on the passenger side of engine compartment, between the battery and cruise control actuator (if equipped)]. (Figure Fig. 1 ) P10 ground point-engine (at the alternator bracket). (Figure Fig. 2 ) The 1998, 1999 or 2000 Rodeo/Amigo Electrical Troubleshooting Manual can assist in locating the vehicle ground distribution (i.e., ground contact points). Perform a voltage drop test at the main ground points. If the voltage drop test fails, then inspect and clean both the bolt and
Filed Under (Oldsmobile) by admin on 17-01-2011
Models: 2004-2005 Buick Rainier 2002-2005 Chevrolet TrailBlazer Models 2002-2005 GMC Envoy Models 2002-2004 Oldsmobile Bravada 2005 Saab 9-7X Condition Some customers may comment on slow to cool Air Conditioning (A/C) performance or high A/C outlet temperatures after start up or that the A/C system is not cooling sufficiently, especially in high ambient temperatures. This may be an intermittent condition and the performance of the Heating, Ventilation and Air Conditioning (HVAC) system may not meet customer expectations. Cause This condition may be caused by the response of the Electro-Viscous (EV) fan clutch and can be related to airflow across the condenser. This low A/C system performance can occur for longer periods of time if the vehicle is allowed to idle or is driven in low speed conditions. The response of the EV fan clutch will affect A/C system performance. As higher road speeds are attained, the increased airflow across the condenser will usually improve A/C system performance and the response of the EV fan clutch. This condition may be more evident after the vehicle has set for a period of time and can be difficult to duplicate. The condition may occur after the vehicle has set for as little as 10 minutes or as long as overnight. It is most prevalent intermittently during the first 15 minutes of operation.
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Filed Under (Honda) by admin on 21-12-2010
NOTE: If DTC P1519 is stored at same time as DTC P0505, troubleshoot DTC P1519 first, then recheck for DTC P0505. 1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on. 2. Check the engine speed at idle with no-load conditions: headlights, blower fan, rear window defogger, radiator fan, and air conditioner off. Is the engine running at 730+/-50 rpm? YES – Intermittent failure, system is OK at this time.? NO – If the idle speed is less than 680 rpm, go to step 3; if it’s 780 rpm or higher, go to step 4. 3. Disconnect the idle air control (IAC) valve 3P connector. Does the engine speed increase or fluctuate? YES – Adjust the idle speed. If the idle will not adjust properly, clean the passage in the throttle body, and then adjust the idle.? NO – Replace the IAC valve.? 4. Turn the ignition switch OFF. 5. Remove the intake air duct from the throttle body. 6. Start the engine and let it idle. 7. Put your finger on the lower port (A) in the throttle body. Does the engine speed drop below 780 rpm? YES – Adjust the idle speed. If the idle will not adjust properly, replace the IAC valve, and then adjust the idle.? NO – With the throttle valve completely closed, check for vacuum leaks, and repair as necessary.?
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Filed Under (Dodge) by admin on 31-10-2010
The high-speed idle screw is factory sealed and cannot be adjusted. Low-speed idle can be adjusted. 1. Use an optical tachometer such as Snap-on No. MT139 or MTE (Cummins tool division) No. 3377462 to read the engine RPM. 2. Bring the engine to normal operating temperature. 3. Adjust the low idle speed at the low idle speed screw. The screw and locknut are located at the rear of the fuel injection pump. 4. Loosen the idle screw lock nut. Adjust idle screw to obtain specified RPM. LOW IDLE SPEED With automatic transmission: 750-800 RPM with transmission in drive and air conditioning on. With manual transmission: * 780 RPM with transmission in neutral and air conditioning on. * With engine at operating temperature. HIGH IDLE SPEED Do not attempt to adjust high idle speed. High idle speed adjustment screw is factory sealed. Breaking seal will void injection pump warranty 5. Tighten the locknut after adjustment.
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Filed Under (Ford) by admin on 23-10-2010
1. Remove the intake manifold. 2. Remove the turbocharger heat shield. 3. Remove the bolts and the high-pressure oil pump cover. Use a thin gasket scraper to separate the cover from the crankcase. Remove and discard the press-in-place gasket. 4. Remove the bolts from the high pressure oil pump discharge pipe. Using the special tool, disconnect and remove the high-pressure oil pump discharge pipe. Remove and discard the D-ring seal. 6. Remove and discard the high-pressure pump O-ring seal. 7. Remove the bolts and the high-pressure oil pump. 8. Remove and discard the lower O-ring seal. INSTALLATION 1. Install a new lower O-ring seal. 2. Install the high-pressure oil pump and bolts. Install the high-pressure pump O-ring seal. Install the oil pump discharge pipe. 5. Install the bolts for the oil discharge pipe. 6. Position the dial indicator with bracketry onto the oil pump drive and check the oil pump drive gear backlash. 7. Install a new D-ring seal on the high-pressure discharge pipe.