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 Re: I did what everyone said and still have high idle when cold
[Re: Jon94JGC]
#885859
05/20/08 07:27 AM
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Joined: Sep 2001
Posts: 8,557
Forum Moderator
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I locked the other thread so the discussion will continue here. <img src="/forums/images/graemlins/kewl.gif" alt="" />
87 Raider 4D56td v5MT1
31's..Basically Stock
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Re: I did what everyone said and still have high idle when cold
[Re: LandRaider]
#885860
05/20/08 04:09 PM
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Joined: May 2005
Posts: 927
Rock Warrior
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Well, if it was my truck and I knew I had a bad IAC I would probably pony up the $$$ and replace that with a new one first. If that didn't solve the issue, then I'd be seriously thinking of taking it to my mechanic and paying him for some quality time with his specialized diagnostic tools to look at the ignition, fuel injector pulse rate/duration, O2 sensor operation, etc.
'89 Dodge Raider -- 3.0L V6, MT, SWB
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Re: I did what everyone said and still have high idle when cold
[Re: Jon94JGC]
#885861
05/20/08 04:22 PM
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Joined: Jan 2000
Posts: 16,227
Web Wheeler
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I recall (the last time I started and ran mine <img src="/forums/images/graemlins/zombie.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />) when started cold that mine idled pretty high also until it warmed up but once I dropped it into gear (Automatic) it didn't stay at that high but dropped down significantly (probably 30-40% IIRC).
If it put it right back to park/neutral it would kick back up though.
After it warmed up it ran at ~700 rpm.
IIRC it always behaved this way.
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 Re: I did what everyone said and still have high idle when cold
[Re: off-roader]
#885862
05/20/08 04:29 PM
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Joined: Dec 2000
Posts: 6,896
Trail Leader
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I recall (the last time I started and ran mine <img src="/forums/images/graemlins/zombie.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />) when started cold that mine idled pretty high also until it warmed up but once I dropped it into gear (Automatic) it didn't stay at that high but dropped down significantly (probably 30-40% IIRC).
If it put it right back to park/neutral it would kick back up though.
IIRC it always behaved this way. x2 on all my Monteros. I still say it is supposed to idle higher when cool.
I just want to tell you both good luck, and we're all counting on you.
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Re: I did what everyone said and still have high idle when cold
[Re: sparkem]
#885863
05/20/08 05:16 PM
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Joined: May 2007
Posts: 4,628
Roll Me Over
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I recall (the last time I started and ran mine <img src="/forums/images/graemlins/zombie.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />) when started cold that mine idled pretty high also until it warmed up but once I dropped it into gear (Automatic) it didn't stay at that high but dropped down significantly (probably 30-40% IIRC).
If it put it right back to park/neutral it would kick back up though.
IIRC it always behaved this way. x2 on all my Monteros. I still say it is supposed to idle higher when cool. Both of you are correct. Mine idles high when cold until it reaches operating temp. Mine also does the same as Ray's when I put it in gear and go back to park. What he's saying is that it runs like doo-doo until it's at op temp. Mine doesn't do that. Mine runs fine if I hop in and go. Makes no difference if it's cold or hot. His, apparently, does not run fine when it's cold, but it does when it's hot. Clear as mud now, right <img src="/forums/images/graemlins/shiner.gif" alt="" />
Fasteddy's advice is occasionally sound...
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Re: I did what everyone said and still have high idle when cold
[Re: hazy_daze]
#885864
05/20/08 05:53 PM
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Joined: Apr 2008
Posts: 52
OP
Getting the Wheeling Fever
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Thank you for all of your help guys. I am thinking about buying a new IAC.
1989 Raider 3.0 5 speed 225K Possible rebuild about 30k ago, no proof.
Dual Bouncy seats, HL washers. New Mud King 235's on 15x7 Crager soft 8's. Dark tint. Superwinch hubs. Herculined Interior.
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Re: I did what everyone said and still have high idle when cold
[Re: Jon94JGC]
#885865
05/20/08 09:51 PM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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yes it is all in one place, but I dont think the answer has yet been revealed
I am looking now at the FSM and chiltons. Nuther even mentions the wax pellet valve... Must have been the stealth site where I saw some info on it
So how to check it off my to do list?
Remove throttle body and give it a look-see?
Is not something that will unbolt without removing throttle body?
1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: I did what everyone said and still have high idle when cold
[Re: generation_one]
#885866
05/20/08 10:11 PM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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it takes about 10 seconds to feel the heat at the valve/hoses. If it was working as designed (or was designed to work?) then the idle would drop then.
Now that the montero can sit still for awhile, I will get to look into this...when i get time
1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: I did what everyone said and still have high idle when cold
[Re: Jon94JGC]
#885867
05/20/08 10:22 PM
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Joined: Mar 2007
Posts: 950
Rock Warrior
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well just for kicks I replaced the thermostat this weekend, and it runs the same. high idle for 6-10 min and sluggish, then it runs perfect after that.
I think I'll give up now. lol it's a safe bet that the extra long fast idle is common but not normal. the rough running could be another differnt matter the IAC you got from the junkyard was the same size as yours?
1989 5 door montero 3.0 auto
stock original Japanese
about 200k miles
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Re: I did what everyone said and still have high idle when cold
[Re: generation_one]
#885868
05/21/08 12:17 AM
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Joined: Apr 2008
Posts: 52
OP
Getting the Wheeling Fever
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yes the jy iac was the same size, but slightly different, but the ohm readings were way different.
1989 Raider 3.0 5 speed 225K Possible rebuild about 30k ago, no proof.
Dual Bouncy seats, HL washers. New Mud King 235's on 15x7 Crager soft 8's. Dark tint. Superwinch hubs. Herculined Interior.
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