njcomanche1227 Posted September 7, 2012 Share Posted September 7, 2012 hey guys i got an 87 mj 2.5l 2wd and my issue is that my truck idles a lil rough(ive heard worse) but not too bad but it still makes me wonder what it is. but as soon as i give it gas (even in neutral) it no longer shakes and vibrates nearly as bad. Any suggestions? Link to comment Share on other sites More sharing options...
mvusse Posted September 7, 2012 Share Posted September 7, 2012 One of the cylinders is missing, time for a tune up: new distributor cap, rotor, plug wires and plugs. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 7, 2012 Share Posted September 7, 2012 Check for vacuum leaks using throttle body cleaner. Good chance the intake manifold is loosening up and that the vacuum hoses around the throttle body are cracked. BTW, ever clean your throttle body? And, verifying good tuneup parts, as stated above, is never a bad idea. Link to comment Share on other sites More sharing options...
anti-christ-comanche Posted October 2, 2012 Share Posted October 2, 2012 my 86 2.5 idles hella rough and ive changed plugs wires and checked all vacuum lines...think i should check the intake manifold? Link to comment Share on other sites More sharing options...
W0G0W4R Posted October 2, 2012 Share Posted October 2, 2012 My manifold gets loose from time to time and dose the same thing... But with this whistle that you can't hear from inside the cab. So every time I turn heads driving by I check that bolt. Link to comment Share on other sites More sharing options...
Zebvance Posted October 3, 2012 Share Posted October 3, 2012 Surprised. Nobody has said anything about checking motor mounts. Link to comment Share on other sites More sharing options...
cruiser54 Posted October 3, 2012 Share Posted October 3, 2012 Or spraying along and around all the intake stuff with carb cleaner to check for vacuum leaks. Uhum.... Link to comment Share on other sites More sharing options...
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