BoneheadJeeper Posted February 4, 2020 Share Posted February 4, 2020 Hello everyone, I need some help! I purchased an 87 comanche about 2 weeks ago fir 500$ it first had a blown freeze plug, then radiator, and I just finished a head gasket job. It will start and run, but it runs like crap. I'm missing almost all of the vacuum lines for the egr stuff. I don't really wanna hunt down all of the parts or put a lot of money into it right now... So here's whats going on... It will start, but won't idle for long, it starts to die out after a few seconds of idle unless i give it throttle then it sounds great, but as soon as i let off the throttle it starts to out again. Can anybody tell/show me what i need to plug and not plug to keep it running? I'm not sure if this photo helps, i can take more if needed. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 4, 2020 Share Posted February 4, 2020 There should be an idle speed actuator at the front of the throttle body. See if that is moving or making any noise. Sometimes it can stick if it sits for a while and cause the engine to not idle right if it is out of adjustment or is sitting to far back. The back vac line needs to go to the base of the throttle body and the front one needs to go to where the back vac line is going at the rear of the cover. Able to snap anymore pics of the bay? Link to comment Share on other sites More sharing options...
BoneheadJeeper Posted February 4, 2020 Author Share Posted February 4, 2020 here's a few more pictures of what i have. I put them back to where they was at when I got the truck. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 4, 2020 Share Posted February 4, 2020 That looks a bit like a mess. Well the vac lines will need to be straightened up. Also run through cruisers tips along with testing some of the sensors to make sure they are within spec. Link to comment Share on other sites More sharing options...
70barracuda Posted February 4, 2020 Share Posted February 4, 2020 My 2.5 did pretty much the same thing. I cleaned up a lot of vacuum lines and deleted alot of the emission stuff to eliminate leak points. But I definitely agree with eaglescout526, my idle adjuster motor actuator (whatever it's called) was simply not working right. It wouldn't adjust idle or do anything really. It actually is supposed to open the throttle up at shut off for easier starting. Rockauto has a replacement but it is only under a YJ Wrangler for some reason. Only place I was able to find it. Once I got mine in truck did everything correctly Link to comment Share on other sites More sharing options...
BoneheadJeeper Posted February 4, 2020 Author Share Posted February 4, 2020 Do you have any pictures of how you deleted and ran your vac lines? I'm gonna order an actuator tonight, mine isnt doing anything at all. But you can hear it sucking air from atleast one of the t-ports on the intake manifold. Link to comment Share on other sites More sharing options...
eaglescout526 Posted February 4, 2020 Share Posted February 4, 2020 83502375 ISA part number. Link to comment Share on other sites More sharing options...
cruiser54 Posted February 5, 2020 Share Posted February 5, 2020 Link to comment Share on other sites More sharing options...
BoneheadJeeper Posted February 21, 2020 Author Share Posted February 21, 2020 So i took apart my idle control actuator and found stripped gears, so i went and bought one at my local parts store, used some online discounts and got it for about 45$ fixed my issue. I also ran some of the vacuum lines to a t and it seemed to help a lot, so thanks everyone for the help! Link to comment Share on other sites More sharing options...
cruiser54 Posted February 22, 2020 Share Posted February 22, 2020 Nicely done. Have you checked the intake manifold bolts? Link to comment Share on other sites More sharing options...
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