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.
1990 Plymouth Colt BaseFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor (TPS): Notes
NOTE:
On fuel injected engines, ensure basic idle speed is set to specification before adjusting TPS. See BASIC IDLE SPEED
(IDLE SPEED & MIXTURE). Perform all adjustments with engine at normal operating temperature, front wheels in straight-ahead position, cooling fan and all accessories off and transmission in Park or Neutral.
TPS TEST APPLICATION
| Application | Test |
|---|---|
| 1.5L Colt, Colt Wagon & Colt 200, Mirage & Precis, Summit | TEST NO. 1 |
| 1.6L Colt & Colt 200, Summit | TEST NO. 2 |
| 1.8L Colt Wagon | TEST NO. 1 |
| 2.0L (VIN V) Colt Vista | TEST NO. 1 |
| 2.4L Ram-50 | TEST NO. 1 |
| 3.0L Ram-50 | TEST NO. 5 |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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