merc9 wrote:
>
> Hi 1999 honda civic 1.4i just replaced throttle body with new
> sensors,flushed rad topped up again,start motor in morning sits at 1500
> rev,s comes down to 1100 then jumps up and down when fan kicks in goes
> down to 800 stop at junction it goes up and down between 1100 and 1500
> help required thanks.


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You've got AIR in the system, and it won't leave until you fill the
reservoir to MAX, and top it up two or three days in a row. The rad cap
allows the system to sip coolant from the reservoir as the engine cools.
If there's not enough coolant in the reservoir, it can't displace the
air it's trying to expel.

This was covered just a couple weeks ago. SEARCH is a handy tool, since
you dont' have to wait for an answer.


'Curly'