Question about 1994 Suzuki Sidekick

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Egr system fuel leaking from diaphragm and also dripping from exhaust manifold area.

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First off DO NOT START or DRIVE this vehicle until this leak is fixed. It is a fireball waiting to happen!


Replace your EGR valve. You might be able to save it by cleaning with carbuertor cleaner but likely not if it is leaking "from the diaphragm" already, but try the $5 can of cleaner first instead of the $100 part if I were you. 2nd leak reported from the exhaust manifold area is likely from the leaking EGR valve. Replace or fix the valve first, then let the existing gasoline pooled on top of your engine evaporate before starting the car. Just starting it could set off the flashpoint of the pooled gasoline from your igntion system spark. Once the fuel has evaportated and you have fixed or replaced your EGR valve, start it and run for several minutes. Use a mirror and flashlight to make sure you do not have another leak somewhere. Good luck and be careful!

Posted on Apr 22, 2014

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Oil leak


Check if the oil is coming from somewhere else. There is no oil or oil passages at the egr valve. The vacuum diaphragm is a ported vacuum signal (from just below the throttle valve, ported vacuum means it only gets vacuum when the throttle plate is opened by the gas pedal-like off idle). The valve is mounted in the intake manifold, and the exhaust gas reaches the valve from a pipe from the exhaust manifold. There just is no oil around the egr valve.

Jul 16, 2013 | Cars & Trucks

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EGR Exhaust Gas Recirculation valve


1.6) EGR - Exhaust Gas Recirculation valve (actuator)

What is it? This is a device that reduces engine emissions of nitric oxides by allowing a measured amount of exhaust gas to re-enter the intake manifold and mix with the air prior to entering the cylinders. The EGR can be vacuum (older types) or electrically driven (modern) or a hybrid combination of both (intermediate age). Adding inert exhaust gas to the intake charge artificially enriches the fuel air mix (by diluting the air) and thereby reduces ignition temperatures associated with lean running conditions

Where is it located? The EGR is associated with the intake manifold. The EGR is sited at a point of contact with both the exhaust and intake manifolds. If the exhaust manifold is remote to the inlet manifold, for example onthe other side of the engine, an exhaust feed pipe leading from the exhaustmanifold to the EGR is provided.

How does it work? Generally intake manifold vacuum acting on a diaphragm draws up on a pintle valve to open a connection between a (usually round) entry port for the exhaust gases and an exit port (usually rectangular) to the intake manifold. The opening of some modern EGR valves iscompletely under the (ECU) control of an electrical motor/solenoid. Since an open EGR port effectively acts as a vacuum leak in the inlet manifold leading to potential starting and idling difficulties, the EGR valve operation is often impeded by an electrical over-ride at cold/start-up until the engine reaches running temperature and high revs. The ECU takes signals from the coolant temperature sensor to determine when the engine is hot before allowing the EGR to function. In some cases, a differential pressurefeedback exhaust (DPFE) sensor, connected to pipes on the exhaust feed to the EGR, informs the ECU when and by how much the EGR should be open.

NEXT 1.6b) EGR faults and how to fix

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

P1131


Fuel/air ratio is correcting rich for an overly lean condition.
Possible Causes:
Fuel System---Exessive fuel presser, Leaking fuel injector(s), Leaking pressure regulator, Low fuel pressure or Contaminated injector(s).
Induction System--Air leaks after the MAF, Vacuum leaks, Restricted air inlet, PVC system, Fuel purge system or Improperly seated dip stick.
EGR--Leaking gasket, Stuck open EGR valve or Leaking diaphragm.
Base Engine--Oil overfill, Cam timing, Cylinder compression, Exhaust leaksbefore or near the HO2Ss.
CHECK AIR FILTER, AIR FILTER HOUSING FOR BLOCKAGE.
VERIFY INTEGRITY OF THE PCV SYSTEM.
CHECK FOR VACUUM LEAKS.
HOPE THIS HELPS YOU ??

Jul 06, 2011 | 1996 Ford Escort 4 Door

2 Answers

The check engine light for my 2005 Taurus SE has been on for a little while then the other day I went to accelerate and nothing happened for a few seconds and when I looked down the check engine light was...


Hi, your bank 1 upstream oxygen sensor is malfunctioning. Recommend you replace the sensor. It is likely this will clear both trouble codes. The sensor is mounted in the rear exhaust manifold, near the firewall. Please let me know if you have questions, and thanks for using FixYa.

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Trouble Code: P0430

Catalyst System Efficiency Bank 2 Below Threshold
Possible Causes:


Air leaks at the exhaust manifold or in the exhaust pipes Catalytic converter is damaged, contaminated or it has failed ECT/CHT sensor has lost its calibration (the signal is incorrect) Engine cylinders misfiring, or the ignition timing is over retarded Engine oil is contaminated Front HO2S or rear HO2S is contaminated with fuel or moisture Front HO2S and/or the rear HO2S is loose in the mounting hole Front HO2S much older than the rear HO2S (HO2S-11 is lazy) Fuel system pressure is too high (check the pressure regulator) Rear HO2S wires improperly connected or the HO2S has failed

Trouble Code: P2197

Lack of HO2S-21 Switching, Sensor Indicates Lean
Possible Causes:


Base engine problems: engine oil level high, camshaft timing error, cylinder compression low, exhaust leaks in front of HO2S EGR System problem: EGR valve is stuck open, the gasket is leaking, or the EVR diaphragm is leaking Fuel System problem: damaged fuel pressure regulator or extremely low fuel pressure HO2S problems: HO2S circuit is open or shorted in the wiring harness or the HO2S is damaged or it has failed Induction System problems: air leaks after the MAF sensor, PCV system leaks, engine vacuum leaks or dip stick not seated

May 05, 2011 | Ford Taurus Cars & Trucks

1 Answer

Egr valve when does it operate


The EGR (exhaust gas recirculation) valve

What is it? This is a device that reduces engine emissions of nitric oxides by allowing a measured amount of exhaust gas to re-enter the intake manifold and mix with the air prior to entering the cylinders. The EGR can be vacuum or electrically driven or a combination of both.

Where is it located? The EGR is most often associated with the intake manifold. The EGR will be sited at a point of contact with both the exhaust and intake manifolds. If the exhaust manifold is remote, for example on the other side of the engine to the intake manifold, there will often be an exhaust feed pipe leading from the exhaust manifold to the EGR sited on the intake manifold.

How does it work? Generally intake manifold vacuum acting on a diaphragm draws up on a valve to open a connection between an entry port from the exhaust gases and an exit port to the intake manifold. An open EGR port makes starting difficult so the valve operation is often impeded by an electrical over-ride until the engine has warmed up, as signaled to the ECU by the coolant temperature sender. In some cases, a differential pressure feedback exhaust (DPFE) sensor fed by pipes from the exhaust feed to the EGR informs the ECU when and by how much the EGR should be open.

Symptoms of faulty EGR

The EGR has two possible fault modes either it is a) open when it should be closed or b) closed when it should be open. (some EGR faults are in fact more likely to be DPFE related)
  • Poor idling: ‘hunts’ at idle and generally rough engine performance. This is due to the air ingress through the split diaphragm or the EGR valve being left open, either event compromises the intake manifold vacuum and in turn this interferes with the ECU’s ability to deliver accurate fuel to air ratio for a given engine speed.
  • Misfire and ‘pinking’: if the EGR is jammed closed or the exhaust feed pipe is blocked (e.g. gummed up with baked carbon) the engine ignition runs lean and very hot, so hot in fact that the fuel air mix can spontaneously ignite causing a misfire. The misfire if pronounced can, in turn, be detected by the engine knock sensors and this gives the appropriate on board diagnostic error codes along with the check engine light. Due to the diesel engines creating more soot in the exhaust a blocked EGR is a much more common complaint in diesels than petrol cars.
  • Surging: A sticking EGR valve can lead to an effect of rhythmic surging a bit like the MAF fault, especially in turbo charged engines. Normally on a warmed up engine the vacuum from the inlet manifold opens the EGR. If the EGR fails to open promptly the turbo can be subject to a slight boost. Extra fuel/air mix is pushed into the inlet manifold as a result, increasing pressure (decreasing the vacuum). Without vacuum in the inlet manifold the EGR closes again but if sticky does so only slowly. This may allow inlet gases to flow through the EGR into the exhaust manifold for a split second. There is a time lag in the sequence of these events leading the engine to surge in cyclical manner.


How to check? With the engine running it may be possible to force the EGR valve open by pressing on the diaphragm with one’s fingers. Failing that pulling off the vacuum line to the EGR, blocking the pipe on the inlet manifold and applying vacuum to the EGR to monitor function will determine if the diaphragm is split. Removal of the EGR assembly and examination of the ports and valve mechanism will reveal any carbon build up.

How to fix? If the diaphragm is split then the EGR needs to be replaced. Most EGR problems are linked to carbon soot build up and this can be cleaned using a cloth, brush and carburetor choke cleaner spray. If the exhaust feeder pipe is blocked this can be cleaned using a piece of frayed hand brake cable as an internal brush. This makeshift brush can be further enhanced by mounting it in a drill to sweep dirt from the interior of lengths of pipe. Some cars (Hondas are a good example) have an elaborate passage way system to provide exhaust gas to each inlet pipe runner. The only way to clean these out is by removing the blanking plugs (no easy task) and then using the makeshift rotary wire brush and carburetor choke spray. New blanking plugs have to be reinstated to make good the passage ways assembly.




Jul 14, 2010 | 1992 Ford Explorer

3 Answers

2001 ford focus had the spark plugs and wire change. Has a code po171.. ran good for two days. The spark plugs are blacker than acs of spades which is running rich. Don't know what to do next. To me its...


PO171-System to Lean (Bank 1)

Air filter cover tight?
All intake ducting tight?
Clean MAF Sensor.--CRC MAF Cleaner
Fuel Pressure Regulator?
EVAP Purge Valve-stuck open?
Vacuum leaks?
EGR System-issues?

Seems your getting a lean O2 Code,because it is trying to correct for a rich condition,as you said.

Is the Throttle Position Sensor-original?

Work on what is driving it rich,my list is a possible.

May 19, 2010 | 2001 Ford Focus

1 Answer

Engine check light stays on all the time. egr flow insuffient.


You do not state the model of car so my answer is generic. The EGR (exhaust gas recirculation) valve sits between the intake manifold and is connected to the exhaust manifold. The EGR device often looks like a circular alien space ship about 7 cm in diameter. Connected to its top is a narrow bore vacuum tube. It may also have an electrical connection on the side. The narrow bore vacuum tube is often connected to a DPFE (Differential Pressure Feedback Exhaust) sensor. The role of the EGR is to allow a certain amount of exhaust gas into the intake manifold to cool the internal ignition temperature so that nitrous oxides are not created in the exhaust. To fix the EGR remove any electrical connections and remove any exhaust feeder pipe that is connected to it. It is usually mounted with only two bolts. Remove the bolts, lift the EGR free and clean the ports and valve face with carburettor spray cleaner and a cloth. The valve should open and close in response to suction on an integral diaphragm (hence the vacuum tube connected to it). Check also that the exhaust feeder pipe is cleaned of carbon deposits, use a stiff wire (a length of frayed brake cable is excellent) and a tooth brush to work away at the carbon deposits. When everything is clean reassemble, reconnect the electrical contacts if any, and also refit the vacuum tube. If the check engine light stays on check the DPFE sensor. If the DPFE sensor is OK check that the fuel pressure regulator is not leaking fuel into the intake manifold: too rich an intake can sometimes cause a misread on the EGR

May 17, 2010 | Cars & Trucks

1 Answer

Getting a code po171 on a '98 ford expedition...O2 sensor? If so whitch one?


CODE PO171 -SYSTEM ADAPTIVE FUEL TOO LEAN. POSSIBLE CAUSE.AIR LEAKS AFTER THE MAF SENSOR OR LEAKS IN THE PVC SYSTEM. EXHAUST LEAKS BEFORE OR NEAR WHERE THE HO2S IS MOUNTED. FUEL INJECTORS RESTRICTED OR NOT SUPPLYING ENOUGH FUEL. FUEL PUMP WEAK. LEAKING EGR VALVE GASKET OR DIAPHRAGM.MAF SENSOR DIRTY CAUSES PCM TO UNDERESTIMATE AIR FLOW / NOW THE BANK 1 SENSOR ITS MOUNTED IN THE EXHAUST SYSTEM BEFORE THE CATALYTIC CONVERTER.THE BANK 2 SENSOR IS IN EXHAUST AFTER THE CATALYTIC CONVERTER.

Aug 27, 2009 | 1998 Ford Expedition

1 Answer

Three trouble codes


Trouble Code: P0421


Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:

Air leaks at the exhaust manifold or in the exhaust pipes
Catalytic converter is contaminated, damaged or has failed

Front HO2S and/or the rear HO2S is loose in the mounting hole

Front HO2S older (aged) than the rear HO2S (HO2S is lazy)

Front HO2S or rear HO2S is contaminated with fuel or moisture


Trouble Code: P1173

HO2S-21 (Bank 2 Sensor 1) Circuit Malfunction

Possible Causes:

Base engine mechanical fault affecting one or more cylinders

EVAP Purge valve stuck or the hoses to the valve are reversed

Fuel metering fault (fuel injector sticking open or leaking)

Fuel pressure too low or too high, fuel supply contaminated

HO2S element is contaminated or the HO2S heater has failed

PCV system has air leaks at the valve or related hoses



Trouble Code: P0174
Adaptive Fuel Trim Too Lean (Bank 2)

Possible Causes:

Vehicle driven low on fuel or until it ran out of fuel

One or more injectors restricted or pressure regulator has failed

Fuel delivery system supplying too much or too little fuel during cruise or idle periods (e.g., faulty fuel pump, or dirty fuel filter)

Air leaks after the MAF sensor, or air leaks in the PCV system

Air leaks at the EGR gasket, or at the EGR valve diaphragm

Exhaust leaks before or near where the front HO2S is mounted

HO2S is contaminated, deteriorated or it has failed

Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)

Base engine -mechanical- fault affecting one or more cylinders

May 18, 2009 | 2001 Mazda MPV

1 Answer

Emmision code 1151 keeps setting


when u write a question give all the info.

FROM THE EMSSIONS REPAIR MANUAL:

Symptoms You will likely not notice any drivability problems.
Causes A code P1151 may mean that one or more of the following has happened:
Electrical:
  • Short to VPWR in the harness or HO2S
  • Water in the harness connector
  • Open/shorted HO2S circuit
  • Corrosion or poor mating terminals and wiring
  • Damaged HO2S
  • Damaged PCM
Fuel System: Induction System: PCV system: EGR System:
  • Leaking gasket
  • Stuck EGR valve
  • Leaking diaphragm or EVR
Base Engine:
  • Oil overfill
  • Cam Timing
  • Cylinder compression
  • Exhaust leaks before or near the HO2S(s)

Dec 13, 2008 | 1996 Ford Explorer

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