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 MANUALSJEEP1991CHEROKEE 2WD L4-150 2.5L VIN P MFIREPAIR AND DIAGNOSISSPECIFICATIONSELECTRICAL SPECIFICATIONSIGNITION SYSTEMSYSTEM SPECIFICATIONS
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFI
System Specifications
1991 Jeep Cherokee 2WD L4-150 2.5L VIN P MFISECTION System Specifications
RESISTANCE VALUES
Ignition Coil Primary Resistance:
21-27~C (70-80~F) 0.95-1.20 ohms [1]
21-27~C (70-80~F) 0.97-1.18 ohms [2]
Ignition Coil Secondary Resistance:
21-27~C (70-80~F) 11,300-13,300 ohms [1]
21-27~C (70-80~F) 11,300-15,300 ohms [2]
Ignition Cables:
Per Foot Min. 3000 ohms, Max. 7200 ohms
[1] Toyodenso
[2] Diamond
SPARK PLUGS
Gap .036 in. (0.90 mm)
FIRING ORDER
Firing Order 1983-90 2.5L (150):
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.