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 MANUALSFORD1987TEMPO AWD L4-140 2.3L HSCREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRSYSTEM PRESSURE READINGS
1987 Ford Tempo AWD L4-140 2.3L HSC
System Pressure Readings
1987 Ford Tempo AWD L4-140 2.3L HSCSECTION System Pressure Readings
PRESSURE GAUGE INDICATIONS
Due to the different types of models and systems the typical pressure gauge indications shown in this section should be used as a guide only. Refer to "Diagnosis and Testing Procedures", "System Diagnosis and Performance Test" for the particular model being tested. When indications other than normal are encountered, these typical indication charts will assist in diagnosing the refrigerant system. It should be noted that pressures may vary slightly above or below due to changes in ambient temperature and relative humidity.
LOW SIDE: Low
HIGH SIDE: Normal
LOW SIDE: Almost at zero
HIGH SIDE: Low
LOW SIDE: High
HIGH SIDE: Very high
LOW SIDE: About 5 psi
HIGH SIDE: Slightly lower than normal
LOW SIDE: High
HIGH SIDE: High
LOW SIDE: High
HIGH SIDE: Low
LOW SIDE: Zero or less
HIGH SIDE: Higher than normal
LOW SIDE: Very high
HIGH SIDE: Slightly higher than normal
LOW SIDE: About 5 psi
HIGH SIDE: Very high
LOW SIDE: Zero
HIGH SIDE: Very low, about 85 psi
LOW SIDE AND HIGH SIDE: Slightly higher than normal
Due to the different types of models and systems the typical pressure gauge indications shown in this section should be used as a guide only. Refer to "Diagnosis and Testing Procedures", "System Diagnosis and Performance Test" for the particular model being tested. When indications other than normal are encountered, these typical indication charts will assist in diagnosing the refrigerant system. It should be noted that pressures may vary slightly above or below due to changes in ambient temperature and relative humidity.
Pressure gauge indication:
LOW SIDE: Low
HIGH SIDE: Normal
Pressure gauge indication:
LOW SIDE: Almost at zero
HIGH SIDE: Low
Pressure gauge indication:
LOW SIDE: High
HIGH SIDE: Very high
Pressure gauge indication:
LOW SIDE: About 5 psi
HIGH SIDE: Slightly lower than normal
Pressure gauge indication:
LOW SIDE: High
HIGH SIDE: High
Pressure gauge indication:
LOW SIDE: High
HIGH SIDE: Low
Pressure gauge indication:
LOW SIDE: Zero or less
HIGH SIDE: Higher than normal
Pressure gauge indication:
LOW SIDE: Very high
HIGH SIDE: Slightly higher than normal
Pressure gauge indication:
LOW SIDE: About 5 psi
HIGH SIDE: Very high
Pressure gauge indication:
LOW SIDE: Zero
HIGH SIDE: Very low, about 85 psi
Pressure gauge indication:
LOW SIDE AND HIGH SIDE: Slightly higher than normal
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.