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Old 02-12-2007, 02:22 PM   #3 (permalink)
rdharper
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Join Date: May 2006
Location: Morgan Hill, Ca
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Quote:
Originally Posted by JEBSR5 View Post
What is it with the 3slo idle? Maybe it's just me, but every vehicle I have ever owned that was fuel injected has had a rock solid idle once op temp was achieved.
My case, really no big deal, but I ask all you experienced people out there why is it I can set idle at rock solid 800 RPM and it stays there on 3 slo until I move the vehicle. Meaning from red light to red light the idle is never the same. It will vary from 600 to 900 RPM. Heck, sometimes it even goes a few lights at 800 RPM at rest or idle. Mine has always done this, so I figured normal for the 3 slo and no big deal, right. What's a few hundred RPM in the scheme of things?
My rig is in very good condition mechanically, engine wise anyway. Well maintained, clean intake and all the tune up maintenance.
Is it a crappy computer control involving the computer or is it crappy sensor or do all 3 slo's do this and I'm way off on calling it crappy. Like I said, it's done this for 200k miles. Obvious choice to me would be IAC valve, but since you would have to buy a whole new throttle body to test that out, obviously my money tree is stunted this year and won't be producing for awhile yet. Any thoughts, dare I say debate or arguments?

Chime in anyone.

I would like to put this mystery to rest, since I will be DD'ing this rig for some time.

Maybe I'm just , but I have searched and researched. Now it's time to rely on experience and wisdom.

Hey, good time for you MDT techs to chime in too. I'm about to with this for living for so long with it.
Disconnect the TPS connector (carefully), restart (you will throw a code which won't hurt anything). See if variable idling goes away. If so, the TPS is misadjusted or not working correctly, if no change in performance, reconnect the TPS... code will go away.
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Richard

"Science by consensus... is not Science." Richard Harper -1988

'94 Toyota 4Runner V6 3L 158K miles 14mpg
'85 Toyota 22rec 4WD SR5 LB PU 208K miles 18mpg
'08 Honda Ridgeline RT 2.6K miles 16mpg
'06 Honda Rincon ATV 410miles/65hrs 22 mpg
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