Jeepjeff859 Posted December 10, 2015 Share Posted December 10, 2015 So my was when i was driving the engine would stumble and act like it was going to stall. Now it won't even idle. the second it starts up it sound like its misfiring like crazy and when i give it gas it stalls. at also back fires like crazy I have replaced the spark plugs , the TPS, i have check the fuel pressure and its getting the correct pressure. I made sure the spark plug wires are in order When i unplug the MAP sensor nothing changes, the same for the idle control, O2 sensor and TPS It sounds like it has a large vacuum leak coming from inside the throttle body. I took the throttle boy off and clean it with carb cleaner. i can't think of what would cause it and I'm about to just replace everything i can buy parts for. If it makes a difference i put a little die electric grease in the spark plug wires. Link to comment Share on other sites More sharing options...
daking Posted December 11, 2015 Share Posted December 11, 2015 does it run fine at speed, other then idle? My jeep just started acting up. kinda like what you describe, except mine runs good at anything over idle. I remove a vacuum hose, and it'll idle. I'm thinking its the Idle air solenoid on the TB. You may want to check that. Link to comment Share on other sites More sharing options...
Jeepjeff859 Posted December 14, 2015 Author Share Posted December 14, 2015 I replaced the IAC and it's still doing it, I can't get it past idle or it stalls out Link to comment Share on other sites More sharing options...
Jeepjeff859 Posted December 15, 2015 Author Share Posted December 15, 2015 It's almost seems like something is telling the IAC to stay wide open is there a sensor that controls it somewhere else Link to comment Share on other sites More sharing options...
Jeepjeff859 Posted December 15, 2015 Author Share Posted December 15, 2015 Also noticed most parts stores list a up stream and down stream o2 sensor . I only have a up stream since I don't have a cat Link to comment Share on other sites More sharing options...
Doc. Posted December 15, 2015 Share Posted December 15, 2015 When in doubt, replace crank censor . I don't actually know anything, just seems like replacing that censor can fix a lot of odd things. Link to comment Share on other sites More sharing options...
Jeepjeff859 Posted December 15, 2015 Author Share Posted December 15, 2015 i look at it today and the CPS was pinched between the transmission tunnel and the transmission so beat back the tunnel alittle and replaced the sensor. It still runs a little rough so but I'm gonna let it idle for a little tomorrow and see if the computer adjusts Link to comment Share on other sites More sharing options...
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