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Old 10-20-2007, 01:44 PM   #1
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Default coolant temp needle doesn't move past 11:30 & high idle

So I noticed that my coolant temp needle doesn't move past "11:30" (little before halfway point), where it used to hang around "12:45-1:00" before. The car also likes to idle around 2.1-2.5k RPM..

I would write my hypothesis but I'd like to see what the gurus have to say without me swaying things with my likely misguided opinions. :gay:
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Old 10-20-2007, 01:47 PM   #2
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I like mine to never go past 11:30. Any past that and the motor is getting too hot. As for the high idle, adjust your idle screw?
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Old 10-20-2007, 02:07 PM   #3
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Quote:
Originally Posted by kotomile View Post
So I noticed that my coolant temp needle doesn't move past "11:30" (little before halfway point), where it used to hang around "12:45-1:00" before. The car also likes to idle around 2.1-2.5k RPM..

I would write my hypothesis but I'd like to see what the gurus have to say without me swaying things with my likely misguided opinions. :gay:
Could be that with the higher idle you are moving more water and keeping the temp down where it belongs. Replace the thermostat and drop the idle. Flush the whole thing out while you have it open.
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Old 10-20-2007, 02:10 PM   #4
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i track my stock 1.6 with an auto radiator...hard. I've had it out in 103* heat, given the track everything the 1.6 had, and the needle never moved. I have seen it move previously, when I had too much coolant in.
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Old 10-27-2007, 09:49 AM   #5
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To revisit, the thermostat is stuck open. The engine was dumping extra fuel and idling high (adjuster screw is now ALL the way in and it STILL idles at 1500!) draining my tank and giving me a very sooty rear bumper. I'll be replacing the Tstat with another NAPA #42 on Sunday and let you know how that goes.

Today though, go-karting in ATL! Andretti Speed Lab FTW!
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Old 10-27-2007, 10:33 AM   #6
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While you are at it, pull the temp sensor at the rear of the engine and test or replace it and check the wiring going to it. It may be telling the ECU that your temp is way low and throwing in the extra fuel(like the resistor trick for European GReddys)
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Old 10-27-2007, 05:47 PM   #7
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I'll do that if the thermostat doesn't fix it, for sure.

Atlanta dudes: I couldn't get the karts under 23.735.. but I beat my dad and my wife!
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Old 11-01-2007, 06:23 PM   #8
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Damn. New thermostat didn't fix it. :(

olderguy - I'm clueless about the temp sensor in the rear of the engine. Which plug is it?
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Old 11-01-2007, 06:25 PM   #9
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The one with the green top
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Old 11-02-2007, 03:27 PM   #10
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Ahh, thank you. Now to call parts store.
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Old 11-02-2007, 03:33 PM   #11
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hmm, i wasn't datalogging this morning, but i was idling at like 2k durng warmup, and like 1.5k when i should have been at operating temp... wonder if i have a similar issue going on.

keep us updated.
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Old 11-02-2007, 06:39 PM   #12
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Okay, so I bought the part and went to install it..

..there's no way my hand is fitting back there. I figure I'll do it when I install my clutch. I can drill/tap the pan really easy while it's out too.
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