Question about 1991 Honda Accord

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1991 honda accord lx getting bad gas milage

Failed emissions replaced exhaust gas recirc valve but still getting about 26 miles to gallon.the egr vv. fixed emissions problem.

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I have known when the distributor starts to go bad it will not fire 100%, that could cause your failure in good gas mileage!

Posted on Jan 20, 2009

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I need to know if I can delete my egr, and if so, how?


Don't watch the video it is only a flash of light.
I have no egr system on my car the worst thing that has happened so far is an engine light but if your truck is a 96 or newer you can get a tuner and set the comp. to not check for the egr now be forewarned it is not legal to do this but who gives a care... And by the way the egr is always hooked up to the exhaust manifold that is why it is called exhaust gas recirc.
But this can help give your engine colder air for a more dense fuel mixture another thing is that you may find that your truck takes longer to warm up in the winter weather.
Hope it helped!

Oct 28, 2012 | Cars & Trucks

1 Answer

Ford explorer sportrac evap and catalyst not ready problem how to fix it?


One possible issue is a faulty thermostat. If the engine is not getting up to normal temp the emissions system will not go into closed loop.
I know its hot in Nevada now so thats just a suggestion.
The O2 sensors have heaters to make the exhaust gas hot quick so that the sensors can work.
Is the check engine light coming on - or is it just that the exhaust gas is not hot enough for the test equipment ?

Aug 09, 2012 | 2002 Ford Explorer

1 Answer

FAILED EMISSIONS TEST P0401&P0420 CHECK ENGINE LIGHT RESETED MANY TIMES WHEN CUT OFF ENGINE LIGHT COMES BACK ON AFTER 5-6 MILES. I HAVE REPLACED EGR VALVE .STILL WA\ONT PASS INSPECTION. WHATS NEXT?


P0401 indicates that the Exhaust Gas Recirculation Flow Insufficient Detected. This can be because EGR is faulty . As you have replaced this then the problem must be with the vacuum line . EGR valve vacuum line which can be broken or blocked. The vacumn ine must bbe checked for leaks or any blocks using an vacumn pump connected the line.

P0420 indicates that the down stream oxygen sensor reading is not steady and it is connected with the code P0401.

Jan 05, 2011 | 2001 Toyota Camry

2 Answers

Taurus SHO wont pass emissions: 95 Taurus SHO 3.2L Failed emissions badly- hydrocarbons in grams/mile=1.68 where .80 is pass carbon monoxide in grams/mile=44.80 where 12.00 pass. oxides of nitrogen in...


If the fuel regulator is seeping gas, replace it first. There is a good chance the diaphragm has a hole in it and is feeding fuel through the vacuum line directly to the intake, causing extremely rich fuel mixture. (Hence the strong exhaust and burning eyes) As a matter of fact, if you pull the vac line off and turn on the key, I bet fuel sprays out. Be careful not to start a fire on a hot engine. Once you get this repaired, erase the codes and retest. You could find yourself with only one code, maybe even none. I wish you luck. Emissions can make you pull your hair out.

Sep 16, 2009 | 1995 Ford Taurus

2 Answers

Check engine light comes on and off, auto zone test read back EGR flow insufficient/manufact.specif.DTC/see service manual.what does any of that mean?HONDA ACCORD 4CYL.2001


The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. When the EGR valve goes bad, it must be replaced.

The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on acceleration.

Here is a picture of where the EGR Valve is located (Accord 1999). Replacing it is fairly simple and straightforward. A vacuum line and a couple of bolts. You'll see what you have to do when you look at it.

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If you are replacing the EGR Valve due to the Check Engine Light (MIL) being on with a DTC P0401 then I suggest contacting your Honda Dealer. There was a Product Update Campaign (PUD) in the fall of 1999 that corrected the problem.

Another times, the clean is the solution...I hope help yoiu with this. Good luck, and remember rated this help.

Sep 03, 2009 | 2001 Honda Accord

1 Answer

The car dies sometimes when idle and sometimes when traviling at


he EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on accelertaion.

Aug 21, 2009 | 1996 Dodge Grand Caravan

3 Answers

FAILED EGR VALVE


The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases.

The EGR valve is vital to your car's emission controls.

When the EGR valve goes bad, it must be replaced - it cannot be repaired.

  • EGR Valve = Exhaust Gas Recirculation Valve.
  • The EGR valve controls formation of noxious emissions.
  • Rough idle and poor acceleration can be caused by a faulty EGR valve.

  • The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on accelertaion.

    The only short term problem is a decrease in gas mileage - but it should really be replaced before sensors become sooted or your cat. convertor gets overworked prematurely.

    Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

    Apr 15, 2009 | Chevrolet Impala Cars & Trucks

    1 Answer

    1995 mercury villager check engine code p1200 injector open


    P0400 = EGR Flow
    P0325 = knock sensor (Do not ever change a knock sensor, they don't affect anything and cost $600 to replace for absolutely no gain)
    P1200 = I can't find this one. I think it's injector flow
    report back on what you find.
    Egr flow may be plugged egr passages or a bad solenoid.
    --------------
    1996 PCED OBDII-Villager SECTION 1B: Description and Operation
    Exhaust Gas Recirculation System
    Exhaust Gas Recirculation (EGR) System Operation The exhaust gas recirculation (EGR) system (Figure 1 below) recirculates a portion of the exhaust gases into the intake manifold under average vehicle driving conditions to reduce combustion temperatures and exhaust gas NOx content. The amount of exhaust gas recirculated varies according to operating conditions and will be cut completely under:
    • Engine starting condition
    • Low engine coolant temperature condition
    • Excessively high engine coolant temperature condition
    • Engine idling condition
    • High engine speed condition
    • Mass air flow sensor failure
    The exhaust gas recirculation (EGR) system on the Villager uses the exhaust gas recirculation/evaporative emission (EGR/EVAP) control solenoid valve to provide vacuum to both the EGR valve and the EVAP canister when commanded by the PCM. If the exhaust backpressure is sufficient to close the EGR backpressure transducer valve, vacuum is sent to the EGR valve and allows EGR gas to flow into the intake manifold. If the exhaust backpressure is not sufficient, the EGR backpressure transducer will remain open and allow vacuum from the EGR/EVAP control solenoid to vent to the atmosphere.
    The EGR system monitor, for OBD II regulations, uses an EGR temperature sensor to monitor the EGR system. The EGR temperature sensor is a thermister located in the EGR passageway. When hot exhaust gas is recirculated into the engine, the temperature at the EGR passageway increases. This increase is sensed by the EGR temperature sensor and a signal is sent to the PCM to indicate EGR flow. If the EGR temperature sensor does not detect EGR flow when commanded by the PCM after two consecutive drive cycles, the malfunction indicator lamp (MIL) will be illuminated and a diagnostic trouble code (DTC) will be stored. The MIL will be turned off after three consecutive drive cycles are completed with no malfunctions detected. The DTC will remain stored in the PCM memory until 80 drive cycles have been completed without the same malfunction detected in the system.
    Figure 1: Exhaust Gas Recirculation (EGR) System Diagram Item Number Description 1 — EGR/EVAP Control Solenoid 2 — Air Cleaner Housing 3 — Throttle Valve 4 — EGR Temperature Sensor 5 — EGR Valve 6 — EGR Backpressure Transducer 7 — EVAP Canister
    Exhaust Gas Recirculation (EGR) Backpressure Transducer Valve The exhaust gas recirculation (EGR) backpressure transducer valve is used to control EGR. The EGR valve is operated by ported vacuum, but the ported vacuum will normally be vented off at the EGR backpressure transducer valve. As rpm increases, exhaust pressure increases and pushes on the diaphragm in the EGR backpressure transducer valve and closes the vacuum vent.
    Figure 2: EGR Backpressure Transducer Value
    Item Number Description 1 — Throttle Valve 2 — Vacuum Port 3 9D475 EGR Valve 4 9F452 EGR Backpressure Transducer Valve 5 — EVAP Canister 6 — EGR/EVAP Control Solenoid 7 — Vent
    EGR/EVAP Control Solenoid The exhaust gas recirculation/evaporative emission (EGR/EVAP) control solenoid (Figure 3) is controlled by the powertrain control module (PCM). The EGR/EVAP control solenoid controls vacuum to both the exhaust gas recirculation (EGR) valve and to the evaporative (EVAP) emission canister. When the EGR/EVAP control solenoid is off (12 V signal from the PCM) vacuum is supplied to both the EGR valve and to the EVAP canister. When the EGR/EVAP control solenoid is on (ground supplied by PCM) vacuum is vented to the atmosphere keeping the EGR valve closed and no vacuum to the EVAP canister. The PCM will command the EGR/EVAP control solenoid on at:
    • Engine starting condition
    • Low engine coolant temperature condition
    • Excessively high engine coolant temperature condition
    • Engine idling condition
    • High engine speed condition
    • Mass air flow sensor failure
    Figure 3: Exhaust Gas Recirculation/Evaporative Emission (EGR/EVAP) Control Solenoid
    Exhaust Gas Recirculation (EGR) Temperature Sensor
    The exhaust gas recirculation (EGR) temperature sensor (Figure 4) is a thermister type sensor that monitors the temperature of the exhaust in the EGR passageway. As the EGR flow increases, the temperature increases. This process creates a change in the resistance of the sensor, which decreases as the temperature increases. The signal is sent to the powertrain control module (PCM) to indicate that the EGR system is working properly. If the EGR temperature sensor does not change resistance as the PCM expects on two consecutive drives, the malfunction indicator lamp (MIL) will be illuminated and a diagnostic trouble code (DTC) will be stored.
    Figure 4: EGR Temperature Sensor Exhaust Gas Recirculation (EGR) Valve
    The exhaust gas recirculation (EGR) valve (Figure 5) recirculates portions of the exhaust gas back into the intake manifold to reduce the amount of the NOx released during combustion and to reduce combustion temperature. The amount of exhaust gases that are released into the engine is proportional to the load on the engine.
    Figure 5: EGR Valve

    Mar 20, 2009 | 1995 Mercury Villager

    1 Answer

    Did not pass emission


    have a professional replace it with a new valve, Be sure that the shop cleans the EGR passages when the EGR valve is replaced. If the EGR system ports are not cleaned, the new valve is at risk of premature failure.

    Jan 06, 2009 | 1990 Buick Riviera

    2 Answers

    95 aerostar 3litre problems with emmisions test


    The egr is the only way to lower the no. heet only works with co and hydrocarbons see if the egr tube is full of carbon or the egr system is blocked up with carbon I have owned aerostars for 10 years and have had both the 3.0 and the 4,0 vans and .be thankful you have the 3.0 you would have to take off the upper intake to deal with the egr on the 4.0

    Nov 30, 2008 | 1995 Ford Aerostar

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