rough idle and stalling after reinstalling PCV
I changed coils and plugs the other day on my 2001 expy 5.4 and i kept getting codes for the left and right bank lean but it's ran fine and idled fine, so today i went to check the vacuum hoses and found that i must have pulled out the PCV valve on accident. So i stuck it back in the valve cover and started it and now it idles real rough and sometimes stalls, so i pulled the PCV back out and it won't even idle. I had a new PCV lying around so i stuck that in there and it didn't make a difference. I know the IAC is the most commom culprit, but why would me reinstalling the PCV cause this
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The elbow probably has a big hole in it. follow the pvc line around back of the throttle body where it pugs into the manifold. check that rubber elbow. Replace it if necessary..
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Yep, most common problem with those symtoms.
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i must have caused the problem when i plugged it back in but how in the world did it run without it plugged in
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Just that little bit of movement and jarring around in the pcv lines during the plug change could have caused a weak dried up line too finally crack.
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it ran disconnected for a weak i had it shoved next to the block
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When it was laying on the motor it was probably still sucking through the PCV. When you re-installed it that is probably when the elbow or line broke/cracked--now it is sucking unlimited outside air.
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