I am looking for the EGR valve on my 1995 Jeep Wrangler 2.5L four-cylinder. I suspect someone before me removed the factory manifold and put in one that was not controlled by EGR. If I truly don't have one, how can I be getting NOX levels of 3.01 and 3.13 when the standard for Arizona is 3.00? Jim K.

which engine? name it by cylinder count and displacement
or by real name.
here ill pretend v6 , 3.8L)
getting EGR errors scanned , are you, and what are they?
see 3.8 engine
on top is this huge metal tube. 25mm? and is top dead center up front.? and goes to the motor driven EGR main valve.
located at right back,behind right of head.and # 5 running.
135 (egr)
246 rear >>>

On a 1995 2.2-liter 4-cylinder engine the valve will be found on the intake manifold with a vacuum hose coming out of it and into the manifold. The valve looks like a mushroom shaped metal component.

Read more: http://www.ehow.com/how_7925077_do-liter-4-cylinder-engine.html#ixzz2cAXIt8W9

idle speed could be low.check cylinders for low compression.ignition timing off could have worn timing chain.check all vacuum hoses could have leaking pcv valve or hose leaking egr valve diaphram or gasket.

Hi thanks for your question' The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,

1. Remove electrical connector (5) at top of EGR valve solenoid.
2. Remove tube mounting bolt (1) at intake manifold.

1. Remove two bolts (4) connecting EGR tube (1) to valve assembly.
2. Remove gasket located between EGR tube flange and EGR valve assembly.
3. Remove two EGR valve mounting bolts (5).
4. Separate valve assembly (3) from engine.
5. Remove and discard metal gasket located between cylinder head and valve assembly.

INSTALLATION

1. Clean area at rear of left cylinder head where it joins base of EGR valve.
2. Clean EGR tube where it joins EGR valve.
3. Position new gasket between EGR valve and cylinder head.
4. Position EGR valve to cylinder head. Install and tighten two bolts (5). Refer to Torque Specifications.
5. Position new gasket between EGR tube flange and EGR valve assembly.
6. Position EGR tube (1) to side of EGR valve and into intake manifold.
   1. Install EGR tube flange bolt (1) at intake manifold. Tighten bolt. Refer to Torque Specifications.
   2. Connect electrical connector (5) to top of EGR valve solenoid (2).Do a final tightening of two EGR tube bolts (4). Refer to Torque Specifications

Yes it makes sense. The Exhaust Gas Recirculation valve is on the intake manifold passenger side by the carburetor.

1. Detach the vacuum hose from the EGR valve.
   
2. Remove the two nuts which secure the EGR valve to the intake manifold assembly.
   
3. Remove the valve and gasket from the manifold.
   
4. Clean all gasket material from both mating surfaces.
   
5. Check the vacuum hose for deterioration and replace as necessary.
   

To install:

1. Inspect the exhaust gas passages in the intake manifold and clean as necessary. Clean the EGR valve assembly as necessary.
   
2. Using a new gasket, install the EGR valve.
   
3. Tighten the EGR valve securing nuts to 17-19 ft. lbs. (22-25 Nm).
   
4. Install the hose on the EGR valve.

A special pump is used to back bleed the system. If you don't own one then you have to be patient and just keep pumping the clutch pedal until it comes back. It can take a half hour to get it back. Just depents on how much air is inside.

The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,

1. Remove electrical connector (5) at top of EGR valve solenoid.
2. Remove tube mounting bolt (1) at intake manifold.

1. Remove two bolts (4) connecting EGR tube (1) to valve assembly.
2. Remove gasket located between EGR tube flange and EGR valve assembly.
3. Remove two EGR valve mounting bolts (5).
4. Separate valve assembly (3) from engine.
5. Remove and discard metal gasket located between cylinder head and valve assembly.

INSTALLATION

1. Clean area at rear of left cylinder head where it joins base of EGR valve.
2. Clean EGR tube where it joins EGR valve.
3. Position new gasket between EGR valve and cylinder head.
4. Position EGR valve to cylinder head. Install and tighten two bolts (5). Refer to Torque Specifications.
5. Position new gasket between EGR tube flange and EGR valve assembly.
6. Position EGR tube (1) to side of EGR valve and into intake manifold.
   1. Install EGR tube flange bolt (1) at intake manifold. Tighten bolt. Refer to Torque Specifications.
   2. Connect electrical connector (5) to top of EGR valve solenoid (2).Do a final tightening of two EGR tube bolts (4). Refer to Torque Specifications

if no check engine light is on, check the egr valve, sounds to me that it is stuck open or the egr silinoid is bad