Whitaker717 Posted July 21, 2023 Share Posted July 21, 2023 Hi guys, I seem to be getting a gremlin in the Comanche. Truck starts and runs fine, but here lately after I start it and start moving it will quietly die. I have to throw it in park and it fires back up then runs fine. What in the world could be going on? I’m guessing a fuel issue somehow. Either fuel pump is having issues or maybe the fuel filter but I don’t know. Any input would be appreciated. I have an 87 4.0. Link to comment Share on other sites More sharing options...
cruiser54 Posted July 21, 2023 Share Posted July 21, 2023 Check that your intake manifold bolts haven't loosened up and that your throttle body and IAC are clean. Link to comment Share on other sites More sharing options...
Whitaker717 Posted July 21, 2023 Author Share Posted July 21, 2023 2 hours ago, cruiser54 said: Check that your intake manifold bolts haven't loosened up and that your throttle body and IAC are clean. Thanks Cruiser I will give them a good cleaning Link to comment Share on other sites More sharing options...
cruiser54 Posted July 21, 2023 Share Posted July 21, 2023 Intake bolts? Link to comment Share on other sites More sharing options...
Whitaker717 Posted July 23, 2023 Author Share Posted July 23, 2023 On 7/21/2023 at 2:47 PM, cruiser54 said: Intake bolts? You have a schematic on which bolts they are? They supposed to be a certain torque spec Cruiser? Link to comment Share on other sites More sharing options...
AZJeff Posted July 23, 2023 Share Posted July 23, 2023 The attached picture shows the factory recommended sequence for tightening the bolts. The torque spec. is 24 ft-lbs, but I just tighten them by my calibrated forearm developed from years of working on vehicles. The most important thing is to make sure the manifold gasket is in good shape. The 4.0 manifold/cyl. head interface isn't the worlds best design, and has a tendency to develop leaks using the OEM type gasket. After the guys on Com. Club pointed me to the "Remflex" gaskets, I have had no further problems with manifold gasket leaks on my MJ. Link to comment Share on other sites More sharing options...
cruiser54 Posted July 23, 2023 Share Posted July 23, 2023 tight. The factory spec was too low. Use the pattern and remove the airbox to make it much easier. Link to comment Share on other sites More sharing options...
Whitaker717 Posted July 24, 2023 Author Share Posted July 24, 2023 Thank you guys I will give this a try. Link to comment Share on other sites More sharing options...
AZJeff Posted July 24, 2023 Share Posted July 24, 2023 On 7/23/2023 at 1:39 PM, cruiser54 said: tight. The factory spec was too low. Use the pattern and remove the airbox to make it much easier. Tight applies when using the OEM style gasket. If you switch to a Remflex, one should be careful to not get too rambunctious with the wrench, because the Remflex gasketcan be over tightened Link to comment Share on other sites More sharing options...
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