Get the latest advice about your car

Get Started
Advice » Problem Reports » Improperly Adjusted Valves May Cause Emissions Failure/Rough Idle

Problem Reports

Toyota Tacoma

Report: Improperly Adjusted Valves May Cause Emissions Failure/Rough Idle

Toyota Tacoma Problem
3 Reports
Me Too Edit

Model Years Affected: 1995, 1996, 1997

Verified

A rough idle and even an emissions inspection failure for high HC and CO can be caused by improperly adjusted valves. Also, exhaust valves may become to tight which can lead to valve failures. Our technicians tell us that regular valve adjustment inspections are a must.

Add to My Checklist
Find a Shop
Related Items:
  • Check engine light comes on and motor runs rough. Code reader says knock sensor
    Tends to happen more when colder and also after running on interstate at 70 mph after 25-50 miles. There is valve train noise especially when cold, but also when hot during acceleration. 151K mil...

    Q&A > Toyota > 2000 Toyota Tacoma

  • high idle
    When coming to a stop, the idle dosn't drop to normal till I tap the throttle. could the pvc valve have anything to do with it.

    Q&A > Toyota > 1996 Toyota Tacoma

  • Rough idle, Cyl 3 miss fire
    Symptom: 1996 Tacoma 250,000 mi. Rough Idle- P0303 Cyl 3 miss fire. Adjusted valves- #3 was a zero lash- brought to spec. Cleared codes- Good drivibility several hundred miles, now P0303 is back a...

    Q&A > Toyota > 1996 Toyota Tacoma

  • Low Compression on Cylinders 1 and 2
    Hi. I live in the Bay Area, CA and I have a ’99 Toyota Tacoma 4WD with a 2.7L 4-cylinder and 158,000 miles. I think I’m having compression problems. The mechanic I’ve been going to is not a Toyo...

    Q&A > Toyota > 1999 Toyota Tacoma

  • Throttle Position Sensor Out of Adjustment Due to Wear/Carbon Build-up
    The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due...

    Common Problems > Toyota Tacoma

Ask a Question