Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSEAGLE1994SUMMIT WAGON AWD L4-1795CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONTESTING AND INSPECTIONSYSTEM OPERATIONAL TEST
1994 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHC
System Operational Test
1994 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHCSECTION System Operational Test
NOTE: The following procedures will allow a basic operational test of the EGR system. Since the EGR operation is controlled by the ECM refer to Computers and Control Systems for further information concerning testing of the systems operation.
NOTE: When disconnecting the vacuum hoses mark or label them to ensure proper routing when connecting.
Cold Engine Test - Coolant temperature is below 20°C (68°F).
1. Disconnect the green striped vacuum hose from the EGR Valve.
2. Using a three-way terminal and vacuum hose, connect a hand vacuum pump into the EGR valve line.
At this point do not apply vacuum.
3. Quickly depress the accelerator pedal to race the engine.
No change in vacuum (atmospheric pressure) should be detected.
After the Engine is Warm - Coolant temperature is above 80°C (176°F)
4. Again quickly depress the accelerator pedal to race the engine. Vacuum should rise temporarily to 3.9" or more.
5. Remove the three-way terminal and connect the vacuum pump directly to the EGR valve.
6. Check to see that the engine stalls or the idle is unstable when a vacuum of 6.8" is applied to the EGR valve.
If there is no change in the engine RPM it is possible that the passages or the valve may need to be cleaned.
NOTE: When disconnecting the vacuum hoses mark or label them to ensure proper routing when connecting.
Cold Engine Test - Coolant temperature is below 20°C (68°F).
1. Disconnect the green striped vacuum hose from the EGR Valve.
Connecting Vacuum Gauge To Three-way Tee:
2. Using a three-way terminal and vacuum hose, connect a hand vacuum pump into the EGR valve line.
At this point do not apply vacuum.
3. Quickly depress the accelerator pedal to race the engine.
No change in vacuum (atmospheric pressure) should be detected.
After the Engine is Warm - Coolant temperature is above 80°C (176°F)
4. Again quickly depress the accelerator pedal to race the engine. Vacuum should rise temporarily to 3.9" or more.
Checking The Operation Of The EGR System:
5. Remove the three-way terminal and connect the vacuum pump directly to the EGR valve.
6. Check to see that the engine stalls or the idle is unstable when a vacuum of 6.8" is applied to the EGR valve.
If there is no change in the engine RPM it is possible that the passages or the valve may need to be cleaned.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.