too fast idle. it is too high right?
but how high? the 4wd model has
a dash tachometer. post that reading.
this has long list of cause.
The hot engine ,idles at 800 rpm A/C off.
the ECU controls that, if it dont idle a 800 hot.
then , : (im skipping cold due to harder to diagose and rpms not stated)
1; Is the coolant temp,
180F min, to 200F max , is it?
if not all EFI cars fail idle her.e.
2: next, is IAC or ISC failure.
the IAC must only be open cold.
the ISC is electric and operates under ECU control
and a 2 fast idle means the ISC has lost control.
it can lose control any time you have air leaks in the intake.
illegal.
the main page on idle is here
http://www.fixkick.com/IDLE-AIR/idle-index-home.htmlthe 98 specific page is here26 ways to fail. here.
http://www.fixkick.com/IDLE-AIR/16v-idle.htmleven a loss distributor base clamp (bad service)
can cause idle to fail.
1: ISC(electric) dirty, clean it.?
2: bad thermostat.
3: IAC (a pure thermo device) stuck open. (my 96 was)
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