Improperly Adjusted Valves May Cause Emissions Failure/Rough Idle on Toyota RAV4

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.

RepairPal Verified
Average mileage: 314,000 (314,000–314,000)
3 model years affected: 1996, 1997, 1999
3 people reported this problem
1 person shared problem details
Rough idle, and by jumping. Codes for 4th cylinder missing, and blocked catylitic converter. Upgraded intake, cleaned erg valve, cleaned throttle body, full tune up, removed cat: Replaced with straight pipe. Removed muffler replaced with heartthrob turbo muffler. Replaced worn pads and shoes. Next will have valve job done
Related Items:
My car misses and jerks/lunges when I reach cruising speed. It does not do this while acceler...
how to adjust my idle when get hot the idle is too low
Just bought and it passed smog easily. No vacuum leaks as far as I can tell. idles smooth and r...
The idle air control motors tend to become carboned up at around 100,000 miles and will cause a...
P to R is rough and feels like i have to force it. then N to D is ok. the car drives fine. the...

Related Content