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i was wondering what is 'normal' for the duratec to idle at (mtx if that makes a difference). i was sitting in my car tonight waiting for a parking spot (damn university parking!) and noticed i'm idling at 750, but like clockwork, every 22 seconds it revs up to 1000, then back down. is this normal? 
98 SE 24V DOHC MTX
-17" konig tantrums wrapped in 215/45ZR17 Falken Azenis ST115, sho shop cold air intake, arospeed sport muffler, taurus 24V badges, custom painted grille, stock foglights added,
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i'm right around 800rpm or so.
i do get periodic surges up to about 1000rpm but then it settles down. not sure about the frequency though.
Hugo
------
98 SVT - 53k mi - SOLD
04 Mazda3 S 5-Dr
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Spec is 725 +/- 50 hot idle.
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i idle right at 750 once it settles down...
new,new ride!
'99 svt
black/mnb
'95 mustang gt sold!
'98 svt #800 sold!
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Joined: Sep 2000
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Whatever rpm I choose!  Which is 850rpm. I also have a high idle setting of 1100rpm for cold weather. (pin hole for a TH fix's only flaw) Stock idle setting for the MTX is 720rpm & ATX is 800rpm.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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I know exactly what your talking about hundog. It only happens when you have the AC or Defrost running (defrost runs the AC compressor). As far is I know, its natural.
~~~~~~Mike~~~~~~
Black 2006 VW Rabbit
Silver 2000 Contour SVT - SOLD
~~~~ The Car~~~~~
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Mine idles at around 650 once it settles down. Don't know why, but it's always been on the low side.
1999 Blk/Tan CSVT #654 - SOLD
2003 Suzuki SV650s
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Originally posted by hunddog:
i was wondering what is 'normal' for the duratec to idle at (mtx if that makes a difference). i was sitting in my car tonight waiting for a parking spot (damn university parking!) and noticed i'm idling at 750, but like clockwork, every 22 seconds it revs up to 1000, then back down. is this normal?
You AC system needs recharging, You will eventually find the engine starts doing this more frequently and also at a higher top rev. I have seen this twice on UK Mondeo's recharging the AC sorted this out, Also it didn't need AC selected for the problem to show it was there all of the time, but not too noticable when driving.
Mondeo (UK Model) GhiaX 2.5 v6
DMD 2003 Version
GhiaX 2000 Spec
Semi Automatic Climate Control
Power Folding Mirrors, Japan Stylie
Ford OEM RSAP
Latest Sump Revision
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Joined: Feb 2003
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thanks for replying everyone. i do think my defrost was on, and no i haven't ever really noticed it while driving or idling at stoplight.
98 SE 24V DOHC MTX
-17" konig tantrums wrapped in 215/45ZR17 Falken Azenis ST115, sho shop cold air intake, arospeed sport muffler, taurus 24V badges, custom painted grille, stock foglights added,
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ok... wat the hell? i WAS idling at 2200...then i got my IAC fixed and some idle work...and now it is down to 1300 which i thought was normal...that isnt even normal??!?!? AHHHH!H!HH!H!H!
95'Contour GL 2.5L (JUNKED!)
~~~
[Current Car]
1995 Ford Mustang 5speed
[Upcoming Car]
2002 Trans Am WS6 (Black on Black)
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