Question about 1992 Daihatsu Charade

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Ecu diagram of HC-E 1300 16 valve - 1992 Daihatsu Charade

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It doesnt haVE ONE 1992 is a ignition module and carb with no cat

Posted on Sep 04, 2010

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Posted on Jan 02, 2017

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How fix that problem


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Nitrous Oxide NO is created when an engine's combustion chamber temperature reaches over 2500F. 1. Lean Fuel Mixture - Lean fuel mixtures cause high NOx. A lean fuel mixture exists when less fuel then required is delivered to the combustion chambers or when more air then necessary is added to the fuel. In either case the lack of gasoline needed to cool the combustion chambers down is not present. Combustion temperatures increase causing high nitrous oxide emissions. A lean fuel condition may be due to a vacuum leak/s and/or defective fuel control components, such as the Air Flow Meter, Engine Coolant Temperature Sensor, and O2 sensors.
2. Defective EGR System - The Exhaust Gas Recirculation system is designed to reduce NO. The EGR system consists of an EGR valve, EGR pressure sensor, vacuum hoses, and one or more vacuum switching valves or solenoids. newer vehicles may use an electronically controlled EGR valves, which do not require vacuum lines or switching solenoids.
The EGR system's job is to re-route a small amount of exhaust gas back into the intake manifold to help reduce combustion chamber temperatures. As mentioned above NOx is created when combustion chamber temperatures reach above 2500F.
By recirculating exhaust gas back into the intake, a small amount of the air/fuel mixture is replaced with inert gas, reducing combustion temperatures.
3. Defective Catalytic Converter Some vehicles operate without EGR valves. Non-EGR equipped vehicles rely heavily on the Catalytic Converter to assist in the reduction of NO. These vehicles have tendencies to develop CAT problems sooner then those which are equipped. If you own a non-EGR equipped vehicle, and have failed the emissions test for high NOx, pay close attention to the Catalytic Converter.
4. High Engine Mileage - Over an engine's lifetime, carbon build-up develops in the engine's combustion chambers. The more miles on your engine, the more carbon build-up on the pistons, cylinder heads and valves. Carbon build-up decreases the available space for the air/fuel mixture to combust, and causes higher cylinder compression. High compression results in high temperatures and high NOx. Keep in mind this problem is usually seen in vehicles with over 150,000 miles which have been poorly maintained. The solution to this problem is called De-Carbonizing. It will remove a good amount of carbon out of an engine. This will increase combustion space, lower compression and lower NOx.
5. Engine Overheating - Inadequate engine cooling can will high NOx. If your vehicle's cooling system is not working efficiently, high NOx will be created. Remember high NOx nitrous oxide is created when an engine's combustion chamber temperatures reach over 2500F. You will want to make sure your vehicle's cooling system is working properly, and your vehicle's temperature gauge is always indicating normal.

Carbon Monoxide is a by-product of incomplete combustion. Carbon Monoxide exceeding maximum limits, can be due to a number of emission failures ranging from inadequate air intake to defective engine computer sensors. This condition is referred to as a "Rich Fuel Conditon".
1. Dirty Air Filter - The number one overlooked emissions component, yes, "emissions" component is the engine air filter. A dirty air filter will absolutely restrict air flow, thus disturbing the proper 14.7:1 air/fuel ratio required for optimum fuel combustion.
2. Faulty Oxygen Sensor The Oxygen Sensor is responsibly for delivering information to the ECU or ECM relating to the oxygen content in the exhaust stream after it has left the combustion chambers.
The engine control computer will determine how much fuel to inject into the combustion chambers based on this data. The more oxygen in the stream, the more fuel the computer will deliver, and visa-versa. A defective O2 sensor will cause increased carbon monoxide emissions.
3. Defective Manifold Absolute Pressure - The MAP sensor determines the level of vacuum created during an engine's intake stroke, and sends this information to the ECU. During low vacuum the MAP sensor assumes the engine's throttle is in some degree open, meaning you've stepped on the pedal. It relays this information to the ECU. The ECU, in turn, sends commands to the fuel injectors, or carburetor, to increase fuel delivery.
A defective MAP sensor will not report the correct information to the ECU, thus disturbing air/fuel ratio. Usually when the ECU senses a defective MAP sensor it will learn to ignore its data, and rely on preset values, and other sensors such as the Throttle Position Sensor, and Engine Coolant Temperature Sensor; Fuel delivery will not be as accurate and high CO may result.
4.Defective Throttle Position Sensor - Obviously a very important emissions sensor; the TPS relays information regarding the position of the air intake system's throttle plate. The throttle plate, located after the engine air filter and before the intake manifold controls the amount of air entering the combustion chambers. It is usually manipulated by the gas pedal via a cable. On late model vehicles the throttle plate may be controlled electronically. A defective throttle position sensor will confuse the ECU into thinking the vehicle's operator is demanding more or less fuel, when neither is really neccessary. Most often a faulty TPS will cause high CO, as an engine's ECU always prefers to send more fuel rather then less, in an effort to avoid a lean fuel mixture and subsequently higher engine temperatures.5. Defective Engine Coolant Temperature Sensor - Low engine temperature requires more fuel. When the ECU is unable to determine what the engine's accurate temperature is, it will not adjust fuel delivery properly; resulting in high CO. As explained above, the Engine Control Computer prefers to send more fuel rather then less to avoid a lean fuel mixture.

Hydrocarbon HC. Hydrocarbons are basically raw fuel, otherwise known as Gasoline. High Hydrocarbon (HC) emissions are almost always a sign of poor fuel ignition. However, it's not always that the engine's ignition system is responsible for high Hydrocarbon emissions.1. Improper Ignition Timing - Engine ignition timing is measured in degrees before or after Top Dead Center. Example of an ignition timing failure would be in the case where an engine's ignition timing is required to be set at 10 degrees Before Top Dead Center and instead is set to 15 degrees BTDC. This fault will not only cause a smog check "functional failure", but will increase Hyrdocarbon (HC) emissions as well. California allows 3 degrees +/- off of the manufacturer's required setting. Newer vehicle's may not have a distributor, and and no timing adjustment will be needed. On these engines timing is electronically controlled by the ECU.
2. Defective Ignition Components Your vehicle's ignition system consists of the ignition coil/s, distributor, distributor cap, distributor rotor, ignition wires, and spark plugs. If any of these components are defective the engine will produce high hydrocarbons. A common reason ignition components perform poorly is due to carbon build-up. High ignition voltage traveling through the air pockets within these components form carbon. Carbon acts as an insulator between paths of electricity, decreasing the energy required at the spark plug to ignite the air/fuel in the combustion chambers properly.
3. Lean Fuel Mixture - Any condition which will cause unmetered air to enter the intake manifold, and ultimately the combustion chambers, will cause high hydrocarbons (HC). This condition is called a lean miss-fire. Such faults as vacuum leaks and gasket leaks will cause lean fuel/air mixtures. Broken, disconnected or misrouted vacuum hoses will do the same. It is also important to note that many engine components rely on engine vacuum for proper operation. If any of these components are defective, externally or internally, they may cause large vacuum leaks as well.
4. Defective Catalytic Converter - A defective catalytic converter may be responsible for high HC, CO, and NOx emissions. The Catalytic Converter, commonly referred to as the CAT is a component designed to continue the combustion process within itself and emit a more thoroughly burned and less harmful emissions containing exhaust. The most accurate way to find out if your vehicle's CAT is working efficiently is by using an exhaust gas analyzer. Unfortunately this tool is fairly expensive.
Some obvious symptoms of a bad CAT could be any of the following:
a. Major loss of power over 15-25 mph. This may be an indication that the catalytic converter is plugged up and restricting exhaust flow.
b. Strong sulfer or rotten egg smell emitting from the exhaust on an otherwise good running vehicle. This may be an indication that the Catalytic Converter isn't burning fuel completely, instead storing it, then releasing it as hydrogen sulfide.
c. Loud rattle being heard from inside the CAT. This may indicate a broken Catalytic Converter substrate. You may want to insure this sound is not due to loose exhaust components.
5. Defective Air Injection Components - Faulty smog pump and related emissions system components will cause high HC. The air injection system is designed to introduce additional oxygen, after the metering system, to the engine exhaust as it exits the exhaust manifold, or directly before it enters the Catalytic Converter; thus burning whatever remaining fuel (HC) in the exhaust completely.
6. Low Cylinder Compression - This fault is one of the less common high HC causing problems. Reasons an engine may have low or no compression in one or more of its cylinders may include things such as burned intake or exhaust valve/s, defective valve guides and/or seals, defective piston rings, and burned head gasket/s. A wet/dry cylinder compression test will diagnose this fault. More then often if such a problem exists it will be very apparent. You should notice rough idle.

Feb 19, 2015 | Cars & Trucks

1 Answer

2001 Subaru Legacy 2.5L failed emissions BADLY in HC GPM 6.3 (1.2 Limit) & CO GPM 189.1 (15.0 Limit) NOx Good! NO check engine light. What do I check?


The first to-do item is read the ECU for any codes. An error does not always turn on the CE light.
6.3 HC means lots of hydrocarbons in the exhaust. This could be running rich so check the oxygen sensor(s). Also check the coolant temp sensor (symptom is hard starts, esspecially when cold. Is the air cleaner filter dirty? If you don't know when it was last replaced, replace it. A dirty filter causes rich mixture.
The catalytic converter could be burned out. This can happen if too much unburned HC gets into it.

A 2001 can be expected to have done 200,000+ km. Could be worn valve guides are letting too much oil into the cylinders. This also affects the catalytic converter. The fix is pull the heads off and have them refurbed.

Feb 14, 2015 | 2001 Subaru Legacy

2 Answers

On 95. -toyo 4 -runner,where are the 2 coolant temperature.and egr valve sensors


Please look at the following diagram to identify the engine sensors of RAV4 3RZ-FE.
25279369-wyb13ilgbx2wjezwdbqvnkml-1-0.png
Hope that works. Thank you for visiting Fixya.

Nov 11, 2014 | 1995 Toyota 4Runner

1 Answer

Does ignition module control fuel


there is no such model on this car.
this car has EFI, in 1992 , the 8 valve has TBI injection and the 16valve G16B had MPI (4 injectors)
both engines the ECU, creates spark at all times.
the input to the ECU is CMP /CKL cam and crank sensors
then the ECU computes ADVANCE and then drives the ignitor
next to the Ign coil. the coil charges and the ECU release this
charge and BAM , mr. Tesla inductive spark. hits the DIZZY.
that is how spark works.

the ECU controls fuel not spark , or better the ECU controls
spark INDEPENDENTLY from fuel;. (with exceptions)
exceptions:
or are you asking about the fuel safety feature built in to all EFI
cars 1988 too now? that is the ECU does monitor Spark
and CMP and CKP and does in fact cut fuel, when the ECU
sees spark missing, yes. It cuts the INJECTORS !

as does , wide open throttle cranking cuts fuel. (injection)
and fuse is (fuel pump) cut after 3 second key on, unless you crank it or runs.

see block diagram here.
http://www.fixkick.com/ECU/EFI.html

Jan 27, 2014 | 1992 Geo Tracker

1 Answer

Dtc p0496 where do I find the EVAP canister purge solenoid valve?


Find?
on the car, ? or to buy one?
in the USA, we have a sticker under the hood, open hood
look up, see vacuum map. It may not show the rear of car vacuum parts.. there are only 2 places to get that info.
alldata dot com or the factory service manual.
USA cars have a more complex system. you never stated country. Our FSM covers all this in chapter 1., page 1a-14
shows the location, for my v6 GV., my purge VSV is top right
rear of my V6 engine, the other EVAP vsv mounted on EVAP
canister bracket.
P0496 DTC ,
during this test the vent valve is closed, if not the vent valve
is stuck open or the caniter is breached, (as in vacuum leaks anywhere this point)
the purge valve is closed, if the ECU sees a pressure drop
it fails, even a loose gas cap... the
fuel tank is sealed. and the vent hose goes to the eval can.
if its not sealed you will get lots of evap DTC errors.
when not driving the car, the system is sealed.
when you drive, the ECU opens both valves. (VSV)
and fresh air flows to the CANister ,via the vent
and then all the nasty HC fumes are sucked in to the intake
of engine via the purge. VSV.
but the ECU does monitor tests on this EVAP.
it is not smart at all, it only knows 3 things.
It monitors tank pressure. and can see the system is breached.
Low pressure all the time.
it can open the purge valve, with the vent closed.
if this fails the system is breached from CAN on back.
once these tests (monitors) pass it then checks that
the vent valve when opened (with purge) does show a drop in pressure.
using the DTC as a reason to just replace parts, is not going to work, and is expensive.
in most cases 99% any evap failure is just a loose gas cap.
or a loose hose. or routed wrong at CAN.
It is not smart enough to show, GAS cap loose.

the drawings in the book are great. ,as are th tests
but the rules for the monitors in the book are horrid.
I learned them the hard way, trial and error.
I created faults an saw the results.

Sep 28, 2013 | 2007 Suzuki XL7 AWD

1 Answer

I recently had an emissions test done on my '90 Ford Bronco, it passed all areas except the HC level. The HC limit is 400ppm @ an idle, the first test my reading was 1812, the shop that tested said that if...


A few suggestions that can help a fresh oil change.I have seen dirty oil peg out the gas analyzer 9999 HC. Replacing the PCV valve if the valve is stuck open all the time it is pulling oil into the intake side of the engine and into the combustion chamber. Hope this helps.

Aug 24, 2010 | Ford Bronco Cars & Trucks

1 Answer

Lr Disco. ABS Shutle valve


sorry but its not that simple my good fellow!!
you need to get aan auto electrician to sort out where the fault is in the wiring loom!
& then can you will needa new ECU swell so expect a hefty $$$$$ cost due to labour [hourly rate]
& ECU,s are expensive
Cheers Rob

Aug 15, 2009 | 2000 Land Rover Discovery

1 Answer

Where is the idle control valve-1985 honda accord


there is no manual adjustment all handle by ecu it should be near throttle

Jul 21, 2009 | 1985 Honda Accord

1 Answer

1996 volvo 850 GLT how to replace air valve and pump


VOLVO STARTED USING THIS SYSTEM IN 1996 AND 1997 850 MODELS IT IS AN AIR PUMP --------------SMOG PUMP TO MEET EPA EMISSIONS THE DIAGRAM OF THE SYSTEM IS LOCATED UNDER THE HOOD AND SHOULD TELL YOU WHERE THE VALVE IS LOCATED THERE ARE MANY ECU SYSTEMS USED ON VOLVOS AND THIS SHOULD PUT YOU IN THE RIGHT DIRECTION IF YOU STILL HAVE A PROBLEM GIVE ME THE 2 BIG NUMBERS ON THE ENGINE MANAGEMENT ECU

Apr 28, 2009 | 2000 Volvo S70

2 Answers

Electrical diagram


Hi,

Might this help?
They were originally posted here and here.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Aug 16, 2008 | 1992 Toyota Celica

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