1990 Toyota 4Runner Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Toyota 4Runner

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1990 Toyota 4Runner Problems

Service AC system at 150,000 miles or every two to three years

Usually by 150,000 miles the AC system will need some attention, especially in climates where it is used often. Our technicians tell us that it is best to service the AC system every 2-3 years. This keeps the moisture in the system at a minimum which extends the life of the components.

Automatic Transmission May Not Shift Correctly at High Mileages

At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.

Check Engine Light Due to Restricted EGR System

The EGR System tends to get restricted or blocked with carbon after 100,000- 125,000 miles which will cause an emissions test failure for NOX. If the EGR system is equipped with an EGR temperature sensor it will trigger a Check Engine Light for improper EGR flow. The repair is to clean out the EGR passages and the EGR Temperature sensor. Our technicians tell this repair is pretty straight forward and takes about 1-1.5 hours. It is also wise to verify the EGR system components i.e. the Transducer, EGR Valve and VSV Solenoid at this time.

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1990 Toyota 4Runner Questions

Clutch pedal engages and disengages at the floor (1 answer)

The clutch pedal engages and disengages about about an inch from the floor. Can this be adjusted? Do I need new clutch plates or to rebuild slave cylinder?

My transmissions slips. I have over 150000 miles on it. (1 answer)

I have a high mileage automatic transmission and it slips a little bit. I have tried some conditioners, but they don't seem to help.

Is there a difference between the idle air control (valve) between the automatic and standard shifing vehicles ? (3 answers)

I can only purchase the idle air control unit specified for manual transmissions

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1990 Toyota 4Runner Recalls

Toyota Recalls 1990-1998 Trucks Due to Cracked Steering Relay Rod

Toyota is recalling 1990-1995 4Runner, 1990-1995 pickup, and 1993-1998 Toyota T100 trucks because the steering relay rod may crack under stress. This may increase the risk of a crash. Dealers will replace the steering relay rod.

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1990 Toyota 4Runner Reviews

Best vehicle ever built. Solid and dependable in any weather. Cheap to keep and easy to repair if needed.

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