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Received my water pump to replace the one with the seepage at the lower weep hole, but am holding off to get the new heater hoses too (genuine Volvo, of course). But strange things are happening:
Coolant level is still slowly dropping, somedays a bit faster than others, still not more than 8 oz in 2 weeks. However, the weep hole on the bottom of the pump and the area where it was weeping coolant is now dry in the morning! At least the past two mornings it was. So I am left wondering where the coolant is going - there are no other signs of leaks. Maybe I should go back to twice daily monitoring of the coolant level and record it as well as presence of seepage from the weep hole.
Also, it has started having occasional idle issues: when lifting foot off of gas, or putting it on the brake, it will let the idle drop almost to stall, then start surging it up and down, then keep it high. Only sometimes, though. It usually runs fine, and can easily come out of one of these spells to run just fine for days. I suspect a bad TPS or TPS/throttle plate adjustment, or crud in the TB. I also have and will install a new radio supression relay, just in case.
Most interesting, the ECU is showing a 2-3-2 error code, "Fuel trim too rich or too lean at idle." Usually a fuel pressure or leaking injector problem. That much I can figure out and fix, eventually. What is really weird, is that a 2-3-2 code is supposed to set off the "Check Engine" light, but it hasn't. And the bulb and circuitry should be fine: it lights up during the self-test every time the engine is started and all the idiot lights light up.
Any ideas or suggestions on either the coolant problem or the idle/ECU code problem?
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Scott Cook - 1991 745T, 1985 RX-7 GSL-SE, 1986 Toyota Tercel (Don't laugh, it is reliable, faithful AND gets 41 mpg!)
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