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Originally Posted by JustJeff
Something very curious happened. I found my battery was nearly dead, and not enough to crank the car. Jumped it and was letting the engine warm up and the battery charge. After it got up to temp I starting setting the idle. It was sitting at just a nudge above 1k. When it had previously dropped down to barely idling and bouncing just above 0. I had been driving it like that for a week or so and after the engine warmed up idle would sit around 800ish. So I turned down the idle to just over 500. About this time my efan kicks on. I toggle my manual switch to have it run longer and bring the temps down further so my fan isn't kicking on and off while I'm working. I toggle the fan off after temps get down low enough and as soon as I do my idle drops from the 500rpm to just barely idling.
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When you get engine idling / running problems dependent on coolant temp, this implies the coolant temperature sensor could be the cause...
Does it check out?
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Also while the engine was warming up and the battery was charging my boost gauge was at 0psi rather than vacuum. It would go up from there if I toggled the throttle. When I turned the engine off closing ceremony took the boost gauge to almost 10psi.
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You talking strictly about the aftermarket boost gauge, right?
I think the aftermarket boost gauge is defective.
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I restart the engine, boost gauge is reading correctly at about 15in/hg but rpms are still amazingly low.
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Not possible - see above.
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Can someone explain the difference between the two idle adjustment screws.
Fast Idle
Not sure the name on this one, but man the pic sure captured the pollen on it (hood as been sitting up on it)
Fast idle is tied to thermowax and turning that screw does nothing for my idle. I am JDM with JDM BAC so I have no idle adjustment there. My only way of adjusting idle is the second pic...of which I do not know the name.
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In the first picture, the idle adjust screw is at the very top, middle of the pic.
I believe it's the same pic as the screw on the left in the 2nd pic?
The screw should be toward the rear of the engine, closer to the firewall.
The screw should be pointing toward to the passenger (US-spec) fender; you need to lean over the passenger fender to adjust this screw.
Don't mess with the "Fast Idle" screw, as this just adjusts the double throttle plates relative to each other - yes, it should not affect idle (that much).
This is still a stock TB, right?
No removal of the double throttle plates?
-Ted