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1976 Toyota Celica Base

1976 Toyota Celica
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June 7, 2012, 5:04 pm

David G
 

Question: What would cause my car to have low rev?

My car's rpm redlines at around 6.2 rpm at which point the rev limiter kicks in. My problem is that my car only revs to about 5.4 rpm before it stalls or becomes limited. I just replaced my timing belt and water pump after changing my head gasket. While the motor was apart I noticed that my vacuum switching valve was broke along with my thermal vacuum valve. I am also recieving code for my throttle position sensor and my knock sensor. Can any of these cause this problem or is it something to do with the timing?


June 12, 2012, 5:22 pm

Elizabeth K
Expert Mechanic

The knock sensor affects the timing, and you should resolve any issues causing the check engine light before you start looking for other causes for the rpm limit problem. The vacuum valves should not affect high rpms.


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