Question about NEC NP50 Projector

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What is the purpose of the coolong pump? What sort malfunction could occur due to that?

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This system uses a cooling pump, to pump high pressure / high velocity air around the lamp dramatically improving cooling efficiency.
With this new cooling system, the body can be further reduced in size compared with ordinary projectors that use a single cooling fan.

If the cooling pump fails then the lamp will overheat and shut down

Posted on Apr 11, 2011

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Posted on Jan 02, 2017

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96 Honda Civic making a popping noise when I release the clutch and third gear


Reasons for popping noise:
Popping noise could occur due to the malfunction in the ignition system, leaky valves, weak cylinder compression, carbon accumulation in the combustion chamber or lean fuel.
1. Ignition system malfunction (Misfire).
Check:
- The ignition timing.
- Spark plug gaps.
- Use colder type spark plugs.
- Ignition module and ignition coil.
- Distributor cap and rotor.
- Spark plug high tension cords.
2. Cylinder compression:
- Check valves clearance.
- Perform cylinder compression test.
3. Fuel system (For lean state).
- Check fuel filter for clogged.
- Check fuel injectors.
- Check fuel pump pressure.
- Check fuel regulator.

May 04, 2015 | 1996 Honda Civic

1 Answer

My hummer h3 2008,the oil pressure lindicator


The engine will shut down to protect itself,check the oil level and see whether the car has oil.The light comes on if the oil level is low or the oil pump is not pumping any oil.I replaced my engine hummer h3 two weeks ago due to a malfunctioning oil pump.Check if you oil pump is not malfunctioning.Good luck hope you have not damaged anything further like the bearings due to lack of oil.

Sep 17, 2014 | 2008 Hummer H3

1 Answer

1999 chevy tracker, no power, can't get over 50 mph. Changed fuel filter but no cahnge


I assume you have already checked your air filter and air inlet for clogging. Another simple diagnostic is to sniff the exhaust when the engine is cold. If it smells very dirty or like unburned gasoline, you either have too rich a mixture or ignition problems.

If that is not the issue, verify that your fuel system has adequate pressure, and that it holds pressure when the engine is accelerated. Most fuel injection systems have a Schrader valve somewhere under the hood for this purpose, and for safely releasing fuel pressure for service. You'll need to get a pressure gauge designed for this purpose - many auto parts stores have some sort of tool deposit/loan program so you don't have to buy it outright. Inadequate fuel pressure can be due to a faulty pressure regulator, failing fuel pump, dented or kinked fuel line, or clogged fuel pump inlet screen.
Another possible cause for poor high-speed performance is a slipping torque converter. However, there will be a noticeable difference between engine acceleration and vehicle acceleration in this case (engine RPM will jump, but the car will crawl).

Oct 01, 2011 | 1999 Chevrolet Tracker

1 Answer

Engine codes are on 420, 2105, 2106, 606,


P0420 -- The ECM uses dual oxygen sensors to monitor the efficiency of the manifold catalytic converter (warm-up catalytic converter). By monitoring the oxygen storage capacity of a catalyst, its efficiency can be indirectly calculated. The upstream (front) HO2S is used to detect the amount of oxygen in the exhaust gas before it enters the catalytic converter. A low voltage indicates high oxygen contents (lean air mixture). A high voltage indicates low oxygen contents (rich air mixture). When the catalyst efficiency drops, no chemical reaction takes place. This means the concentration of oxygen will be the same at the rear as it is at the front. The output voltage of the rear HO2S copies the voltage of the front HO2S.To monitor the system, the lean-to-rich switches of the front HO2S to the rear HO2S is counted. The ratio of rear switches to front switches is used to determine whether the catalyst is operating properly. An effective catalyst will have fewer rear switches than front switches, that is, a ratio closer to zero. P2105 -- If a malfunction occurs in the Electronic Throttle Control(ETC) system, the ECM will control the engine from predetermined data stored in its memory or stop the engine if a safety problem is anticipated,as an Emergency Operation(Limp-Home)mode. The purpose of Limp-Home mode is to control the engine as close as possible to normal engine operation if a malfunction occurs. When the DTC related to ETC system is recorded by the ECM, then this DTC will be set. This DTC only indicates malfunction related to ETC system has occurred and engine is in Limp-Home mode. DO ALL REPAIRS associated malfunction with ETC system. P2106 -- If a malfunction occurs in the Electronic Throttle Control(ETC) system, the ECM will control the engine from predetermined data stored in its memory or stop the engine if a safety problem is anticipated,as an Emergency Operation(Limp-Home)mode. The purpose of Limp-Home mode is to control the engine as close as possible to normal engine operation if a malfunction occurs. When the DTC related to ETC system is recorded by the ECM, then this DTC will be set. This DTC only indicates malfunction related to ETC system has occurred and engine is in Limp-Home mode. DO ALL REPAIRS associated malfunction with ETC system.

Feb 06, 2011 | 2006 Hyundai Sonata

1 Answer

COOLING HOW IT FLOWS THE WATER WERE IT GOES IN THE TOP ABOVE THE WATER PUMP BOWS OUT NOT IN AND BUILDS UP TO MUCH PRESURE AND OVERHEATS


coolong system flows from the top of the engine to the top rad, flows down out the bottom to the water pump then through the engine, sounds like the thermostat is frozen solid,

May 11, 2010 | 1996 Mercury Grand Marquis

1 Answer

How difficult is it to replace the front impact sensor on a honda pilot 2005?


Should be done by a repeatable repair shop due to the fact that if a malfunction should occur they can be held responsible. Inadvertent air bag deployment could occur. Safety systems like that are best left to the experts.

Feb 08, 2010 | 2005 Honda Pilot

1 Answer

Not only does the temperature rise when in stop and go traffic or when idling for a while, but then, when I start up, the exhaust emits a big white cloud. Is that still a symptom of a coolong fan...


I think you have 2 separate problems. The first is very likely a cooling fan malfunction. Unfortunately, a big white cloud of exhaust gases usually means head gasket leakage, which could have been caused by the engine overheating.

Sep 28, 2009 | 1999 Saturn SL

1 Answer

Haier model hr36civar heat pump unit . only need work ac please .


All but one heat pump energizes the Reversing valve in cool. Rheem-Ruud-Weatherking. You need to have power to the reversing valve for coolong. Just energize the valve from inside. Send one power wire out just for the Valve and use the ground or blue coming back. Rus

Jul 18, 2009 | Heating & Cooling

2 Answers

What does the message "Preventative Maintenance" mean when I start up my 2007 Mitsubishi Outlander mean?


Preventive maintenance (PM) has the following meanings:
The care and servicing by personnel for the purpose of maintaining equipment and facilities in satisfactory operating condition by providing for systematic inspection, detection, and correction of incipient failures either before they occur or before they develop into major defects.
  1. Maintenance, including tests, measurements, adjustments, and parts replacement, performed specifically to prevent faults from occurring

Jan 18, 2009 | 2007 Mitsubishi Outlander XLS

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