Thread: Starving 5.9L
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Old 07-16-2013, 05:55 PM
Warlock III Warlock III is offline
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My IAC was also intermittent and not always a sure thing, except in colder weather it was a little more problematic. Yeah, I'm pretty sure the EGR has a solid port on the top that looks like they forgot to finish it for a vacuum line.

You can try unplugging the IAC and see if it reproduces the effect of when its acting up. If you unplug it and you feel what you feel when its acting up, then there you have it. However, it's not always an accurate determination because it may be open when you unplug it, but when it's malfunctioning, it may be closed. So it might fool you into believing it's not the problem.

I'm really sorry if that sounds confusing.
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