86jeep Posted February 14, 2012 Share Posted February 14, 2012 Ok i change the 02 i put new plugs and clean the throttle body. It help for a few days. Now it back to poping in the exhaust again when u cut the truck off Link to comment Share on other sites More sharing options...
JeepcoMJ Posted February 14, 2012 Share Posted February 14, 2012 plugs, wires, cap, rotor would be a start. surely plugs, if it's putting unburnt fuel into the exhaust. aside from that, check for an intake manifold gasket leak. I assume it's a 4.0? a bad intake/exhaust gasket leak would allow fuel to get out and right down in the exhaust. doubtful, but it's an idea. aside from that, any fuel injectors wet when you shut it off or while running? if so, cracked injector. Link to comment Share on other sites More sharing options...
Pete M Posted February 14, 2012 Share Posted February 14, 2012 a similar issue on my 86 was caused by corrosion on the + terminal of the coil which apparently caused a weak spark. the gas eventually blew my muffler apart. :doh: Link to comment Share on other sites More sharing options...
86jeep Posted February 16, 2012 Author Share Posted February 16, 2012 2.5 i put new BWD Ignition Coil , new Xact Spark Plug Wire Set, new Autolite Single Platinum Spark Plug's , new BWD Distributor Cap , and BWD Distributor Rotor, all about 4 months ago. Last week i put new Champion Spark Plug's, Denso Oxygen Sensor Direct Fit, and clean the throttle body. it still doing it Link to comment Share on other sites More sharing options...
86jeep Posted February 17, 2012 Author Share Posted February 17, 2012 any help Link to comment Share on other sites More sharing options...
Pete M Posted February 17, 2012 Share Posted February 17, 2012 have you taken things apart and watched the fuel injector in action to check for flow and drips? Link to comment Share on other sites More sharing options...
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