I have a 1999 expedition 5.4 the same motor as the 98 . you will need metric socket's 1/4 " drive and a 3/8 " drive with a deep 10 mil. socket . also a large adjustable wrench and a pipe to fit over the adjustable ( as a breaker bar ) take off the throttle body cover , disconnect the EGR pressure switch , (I HADE TO REPLACE THE PRESSURE SWITCH ALSO ) there are two nuts holding that on , remove , there is one bolt on top holding the black bracket on , remove . Take the adjustable wrench and undo the large nut on the EGR valve , this is where the deep socket comes in undo the two remaining bolts and remove the EGR valve , clean the surface very good . Use throttle body cleaner and clean the inside good . seal gasket and repeat . I hade the check engine code reset , and my gass mileage inproved .
GOOD LUCK
A 1998 Dodge Ram does not have EGR.
That's your EGR valve flow is insufficient. Replace the EGR valve.
Its under the EGR on the block ya. follow a hose from egr to vsv from underside of car
take the EGR valve off and spray carb cleaner in the egr valve and in the port. This will some times work as it gets plugged up
There isn't a EGR on your 98. The last year that offered that was 90. There isn't a EGR on your 98. The last year that offered that was 90. There isn't a EGR on your 98. The last year that offered that was 90.
After removing an EGR valve from the vehicle, the valve can be flushed with carburetor cleaner. If the valve still sticks then a replacement will be needed.
Code P1491 Means: EGR Valve Lift Insufficient Detected EGR Valve needs to be replaced
It's bolted right on top of the egr valve which is on the back of the engine under the throttle body there will be a small vacuum line going into where the egr valve bolts into the intake
if you look on your intake, right next to the firewall the egr valve is the circular diaphragm that on my 98 sport has a green wire with a black boot leading through the firewall and attached to it. replacement consists of removing the two bolts holding it and putting the new one in its place.
I don't know about the 96', but for the 98' and 2000 it is located on the top of the valve cover on the passenger side near the back. Just pull the hose out and replace the valve on the end. .
It should. Look at the EGR valve; it's on the drivers side of the head. If the EGR valve is the same, everything else should be easy to exchange.
A faulty EGR valve can cause a 98 Chevy to fail a smog test. The oxygen sensors should also be tested as they can also cause a 98 Chevy to fail a smog test.
EGR stands for Exhaust Gas Recirculation. The purpose of the EGR system is to lower the amount of oxides of nitrogen the engine produces. The parts of the system are the vacuum actuated EGR control valve, the vacuum switching valve, and the EGR vacuum modulator assembly.
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it could be a bad egr valve....either remove and clean, or just remove and replace....you can clean it with carb cleaner, but they arnt too expensive to just replace instead
4.2L, 4.6L, 5.4L and 6.8L Engines 1. Disconnect the negative battery cable. 2. Remove the vacuum hose from the EGR valve. 3. On the 4.6L engine, remove the nut and brake booster bracket. 4. On the 5.4L engine, remove the DPFE sensor retaining nuts and place the sensor to the side to allow access to the EGR tube. 5. Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve. 6. Remove the EGR valve mounting bolts, then separate the valve from the intake manifold. 7. Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold. To Install: 8. Install the EGR valve, along with a new gasket, on the manifold, then install and tighten the mounting bolts. 9. Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 25-35 lbs. (34-47 Nm). 10. Connect the vacuum hose to the EGR valve. 11. On the 5.7L engine, install the DPFE sensor. 12. On the 4.6L engine install the brake booster bracket and the retaining nut. 13. Connect the negative battery cable.
On a 98 rav4 you disconnect the two rubber hoses one on top and one on the side, you then remove the 12 mm nuts that bolt the valve to the intake manifold, then you remove the 10 mm screws from the bottom of the valve that goes to the cylinder head.
very simple.. There r two nuts that u loosen and remove, i think they r 13 mm.. Unclip the small wire conection. Take off the egr valve. Make ure the mounting surface is clean of old gasket, then reinstall the same way
4.2L, 4.6L, 5.4L and 6.8L Engines 1. Disconnect the negative battery cable. 2. Remove the vacuum hose from the EGR valve. 3. On the 4.6L engine, remove the nut and brake booster bracket. 4. On the 5.4L engine, remove the DPFE sensor retaining nuts and place the sensor to the side to allow access to the EGR tube. 5. Disconnect the EGR valve-to-exhaust manifold tube from the EGR valve. 6. Remove the EGR valve mounting bolts, then separate the valve from the intake manifold. 7. Remove and discard the old EGR valve gasket, and clean the gasket mating surfaces on the valve and the intake manifold. To Install: 8. Install the EGR valve, along with a new gasket, on the manifold, then install and tighten the mounting bolts. 9. Connect the EGR valve-to-exhaust manifold tube to the valve, then tighten the tube nut to 25-35 lbs. (34-47 Nm). 10. Connect the vacuum hose to the EGR valve. 11. On the 5.7L engine, install the DPFE sensor. 12. On the 4.6L engine install the brake booster bracket and the retaining nut. 13. Connect the negative battery cable.
on right hand side of engine,on drivers side by back valve cover.it is round and has wires going to it on top!
Late 98 they stopped using EGR valves on the S-10. They installed a block off plate in its place.
I believe the DPFE is called a Differential Pressure Feedback EGR sensor It has something to do with controlling the amount the EGR valve opens ( P.S. I'm not a mechanic / technician )
erg or egr? egr valve is located in the back top of the engine slightly to the left if your looking under the hood. it looks like a cylinder...thats the way it is in my 98 anyhow It is to the rear of the motor on left. Cylinder shaped with wires coming out of the top. 2 bolts hold it in place.
the egr valve is on the back of the engine about 3 inches round with a 5 wire connector going to it. It is right beside the breather tube going into the engine
it is mounted to the back of the rear valve cover, it has 2 hoses from the smog tube running to it.