01-28-2015, 09:34 AM
plugs look perfect
the cold idle air, iAC thermal is under the Throttle body
the iSc has 3 hoses, 1 air and 2 water. and is electric, idle speed controller mounted to left side if plenum forward of TBody.
when you stop and engine it might leak down, to the cylinders. (the pump like down test finds that. 30seconds, not drop below 25psi? IIRC
the hot starts are worry some
it can be too much fuel, and not start, the burn off and plugs look great.
id check pump leak down, of good. then FPREG leakage. at vac, nipple. it must not leak.
and last isc, actions...
the hot start, has just 2 air sources, ISC and bleed.
so if the ISC is stuck closes, it will have hard starts, unless 5% throttle added. hot.
is the idle switch closed? if not, it may not open ISC correctly
usually old iSC leak air, but some can stick, the PCV cloud filth loves to migrated there.
the cold idle air, iAC thermal is under the Throttle body
the iSc has 3 hoses, 1 air and 2 water. and is electric, idle speed controller mounted to left side if plenum forward of TBody.
when you stop and engine it might leak down, to the cylinders. (the pump like down test finds that. 30seconds, not drop below 25psi? IIRC
the hot starts are worry some
it can be too much fuel, and not start, the burn off and plugs look great.
id check pump leak down, of good. then FPREG leakage. at vac, nipple. it must not leak.
and last isc, actions...
the hot start, has just 2 air sources, ISC and bleed.
so if the ISC is stuck closes, it will have hard starts, unless 5% throttle added. hot.
is the idle switch closed? if not, it may not open ISC correctly
usually old iSC leak air, but some can stick, the PCV cloud filth loves to migrated there.
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