Hi All,
I have a '92, 1.6l JRSC w/ 152k on it (95k FI, 8 psi). Last Friday I replaced the radiator. After restarting, the engine is pulling lower vacuum (~ 4" lower) at all speeds, the power is down even in boost and the idle dropped ~ 250 rpm. It is rough @ idle but stable. The car was running well prior to this. It did start consuming oil about 3 weeks ago after changing from Mobil 1 15w/50 to Royal Purple 5w/30 race. I am attributing the consumption to thinner oil on a high mileage engine. I intend on changing back to Mobil 1. I have pulled the plugs and only #1 has some dark dry carbon deposits on it; the rest are tan in color. The car was running rich prior to re-tuning. There is trace oil in the intake all the way back to the SC. I have pulled the valve cover and checked the static timing which looks good; the belt deflection is within specs. If anyone has any ideas, I'd like to hear them. Thanks, Mark P.S. The engine is currently down to the timing belt.
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