Posted here because it’s a b16, but I don’t think it’s a hybrid specific problem. This is a b16a1 in a 1991 LS.
Before I get the little search smiley, I ahve done a search, and as a result, have some info.
My warm idle is bouncing from about 750 to 1500 rpm. This seems to be a common problem but with many many solutions. So far, I have done all of the simple things: my coolant is fine, my brake pressure is fine, my voltage regulator is working properly. I only have one O2 sensor running from my header, but it doesn’t throw codes, and splicing it did not solve this problem (and made the engine seem to run a little worse). Today I took apart my fast idle valve, but that is also working correctly.
One thing that may be curious is that when I pull off the 3P connector to the TPS, the idle goes up to 2K and stays there. I don’t know if this is a normal result. If not, I would think this indicates that my problem is electrical, rather than a problem with vacuum like I thought.
Any thoughts on this? And what effects can I expect from running with the TPS disconnected, other than getting the high idle and check engine light? I am happier with the 2K constant idle than the bouncing one (I sit in traffic a lot unfortunately), but I want to make sure I’m not f-ing anything up in the meantime.
Steve