Megadan Posted May 6, 2015 Share Posted May 6, 2015 The reason your idle shoots way up is because you have a big hole of a vacuum leak at the intake manifold. it's letting more air in - hence higher idle speed. Link to comment Share on other sites More sharing options...
Marine1Texas Posted May 6, 2015 Share Posted May 6, 2015 if you drive with a intake nipple open you going to have even more problems. Have you pulled that fuse box out and cleaned everything up too? My truck I had to do it twice in the life of the truck. Seems my turn signal fuse every 4 or 5 years gets loose and have to wiggle around. then I re do solder on back. Link to comment Share on other sites More sharing options...
Dom U Posted May 6, 2015 Author Share Posted May 6, 2015 if you drive with a intake nipple open you going to have even more problems. Have you pulled that fuse box out and cleaned everything up too? My truck I had to do it twice in the life of the truck. Seems my turn signal fuse every 4 or 5 years gets loose and have to wiggle around. then I re do solder on back. iv lightly cleaned my fuse box it appears in good shape and I have no electrical problems anymore. Link to comment Share on other sites More sharing options...
Dom U Posted May 6, 2015 Author Share Posted May 6, 2015 Its not the IAC, MAP or TPS. Fuel pump sounds great and was installed in November. CPS is new from November from Napa. I really don't kno what else to try. I'm startingto think something might be up with my ECU Link to comment Share on other sites More sharing options...
Megadan Posted May 6, 2015 Share Posted May 6, 2015 Ignition Control Module and/or coil and the wiring related to that system. That would be my next stop. Link to comment Share on other sites More sharing options...
Dom U Posted May 6, 2015 Author Share Posted May 6, 2015 Ignition Control Module and/or coil and the wiring related to that system. That would be my next stop.Ill check them all out. It really Dosent seem to be electrical imo. Its normally when I'm letting off acceleration that it dies but I'd ileave it running it'll die just randomly. No change just instantly the engine stops. Link to comment Share on other sites More sharing options...
Dom U Posted May 6, 2015 Author Share Posted May 6, 2015 Would the cranksgarft vent hose being totaly clogged cause it to die? It is part of the vaccum system isn't it. Link to comment Share on other sites More sharing options...
Marine1Texas Posted May 6, 2015 Share Posted May 6, 2015 If crank case vent was clogged it would not cause that. it would just give oil in your air box. Did you clean the connection on the ICM? I think those are about 80 bucks. Coil for it are very cheap seen less then 20 buck on rock auto. When I redone my engine I replaced all the ICM, coil and distributor. I know you can get everything for less then 200 dollars. RockAuto is a great spot to get parts. I seen ECU's for cheap less then 100 for some remanufactured. I seen them as cheap as 40 dollars used. It's always possible that's it. The ECU is the only thing I have not ever replaced. I know my ECU has a problem, however not bad enough to replace it. I Switch ECU between my 4.0's and it idled perfect. It makes the idle move up and down 150 rpms. however it does not die or mess with the way it runs. Link to comment Share on other sites More sharing options...
Dom U Posted May 7, 2015 Author Share Posted May 7, 2015 Going to try a new ignition coil Link to comment Share on other sites More sharing options...
Dom U Posted May 7, 2015 Author Share Posted May 7, 2015 Well replaced ignition coil runs exactly the same but hasent died yet. Will put some miles on her tomorrow and see what happends. Link to comment Share on other sites More sharing options...
Marine1Texas Posted May 7, 2015 Share Posted May 7, 2015 watch those coils, I had one years ago start and work fine, then just die. 1 minute later work fine for 3 or 4 miles. puzzled the hell out of me. because it did that for months. Till I though let me change it out and see. Was not a jeep but same concept . Link to comment Share on other sites More sharing options...
Dom U Posted May 7, 2015 Author Share Posted May 7, 2015 watch those coils, I had one years ago start and work fine, then just die. 1 minute later work fine for 3 or 4 miles. puzzled the hell out of me. because it did that for months. Till I though let me change it out and see. Was not a jeep but same concept . Yeah I hate intermittent crap its hard to track down lol Link to comment Share on other sites More sharing options...
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