Toyota Tercel Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Toyota Tercel
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Toyota Tercel ProblemsDriveability Concerns Due to Throttle Position Sensor Out of Adjustment
The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.
The Toyota Tercel has a known issue with the valves that if left unchecked, will cause burned valves and engine performance issues.
The engine ‘breathes’ through valves that are pushed open by the camshaft, and closed by springs. When valves are closed, they seal against a valve seat. In this vehicle, the valve seat is too soft, so after the valve contacts it thousands of times, it becomes crushed. Once it is crushed, the valve can no longer make a proper seal, and the valves erode due to extreme temperature (burnt valve).
Symptoms related to this issue:
- Rough idle
- Backfiring through exhaust or intake
- Illumination of the check engine light
- OBD Trouble Codes P0300, P0301, P0302, P0303, P0304
- Loss of power
- Engine Stalling
To repair the burnt valves, the cylinder head must be removed and rebuilt, which is a costly internal engine repair, however, this issue can be prevented through inspection and adjustment of valve clearances every 40,000 miles.
Toyota Tercel Questionswhy do you not list 1984 since that is the model Tercel I am in need of help? (2 answers)
I damaged the driver side front hood, fender, headlight assembly and axle. The driver side front wheel is pushed back-the sub frame may be damaged. Where can I find these parts?
Is the o/d light suppose to be on but says it's off?
It always for the past 23 yrs ran cool with the heat indicator needle near C. Never over heated until last week. With new thermostat, engine heat indicator needle runs consistently just below 1/2 way. This is quite a bit warmer than usual. Is it normal for a new thermostat to be this much differe...