4wdAdventures Posted September 25, 2016 Share Posted September 25, 2016 Bought an 87 MJ with a 2.5 and 4 speed. Love this thing, but have a high and rough idle. Replaced vacuum lines one by one till I came across a solenoid of some sort laying on the pass side wheel well with both hoses disconnected. No idea what the unit is or where the lines go, and seem to have a possible issue with the throttle body having what appears to be 2 missing vacuum ports. Any tips on these issues? Link to comment Share on other sites More sharing options...
SVPete Posted September 26, 2016 Share Posted September 26, 2016 Not familiar with the 2.5.....but the first picture certainly looks looks like the EGR solenoid valve on my truck. Link to comment Share on other sites More sharing options...
4wdAdventures Posted September 29, 2016 Author Share Posted September 29, 2016 That's what I'm thinking it is. Missing spots to hook the one end of the vacuum line too unless I'm missing something somewhere Link to comment Share on other sites More sharing options...
cruiser54 Posted September 30, 2016 Share Posted September 30, 2016 Spray around those vacuum lines on the intake with carb cleaner while the engine is running and see what happens. Link to comment Share on other sites More sharing options...
omega_rugal Posted September 30, 2016 Share Posted September 30, 2016 that`s the EGR solenoid... remove it and remove the EGR entirely, it will run better at all RPMs... Link to comment Share on other sites More sharing options...
Ωhm Posted September 30, 2016 Share Posted September 30, 2016 Your second photo of the TB, doesn't that show the upper right missing the nipple. Can't tell if a plug is in there or not. Link to comment Share on other sites More sharing options...
4wdAdventures Posted October 1, 2016 Author Share Posted October 1, 2016 that`s the EGR solenoid... remove it and remove the EGR entirely, it will run better at all RPMs... If not residing in the communist smog state of California I most certainly would. Then one would just cap off said egr valve? Link to comment Share on other sites More sharing options...
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