Join Date: Jan 2006
Location: Southeastern CT
Check your vacuum can underneath your battery tray. I had a vac line that used to disconnect under there all the time.
After doing my 4.0 swap, my t-case vacuum switch died--it wouldn't vent properly anymore. I think it was a $40 part from quadratec. Anyway, check your vac lines first before replacing anything. If both the lines are plugged into the vac can, trace back and look for disconnected lines. I used to have vac lines come disconnected at the back of the head by the firewall.
2005 Jeep Wrangler TJ Sport
2009 Honda Accord EX
2008 Honda CBR600RR Graffiti Edition