xmeatbagx Posted May 22, 2013 Share Posted May 22, 2013 I have a 1989 comanche with a 94 cherokee 4.0. The intake and throttle body are off a late model 4.0. When I'm speeding up normaly between 35 and 45 the rpms cut out and the truck spudders sometimes stalling out. Also when I stop at a light or stop sign it idles low and sometimes stalls. So far all i've tried tried was changing the fuel filter. I've got no clue what it could be. I'm hoping it's something cheap. Thanks Link to comment Share on other sites More sharing options...
Geonovast Posted May 22, 2013 Share Posted May 22, 2013 Well your RPM isn't really going to spudder around like that, chances are is that it's misfiring. The tach gets its signal from the coil, so if it's firing erradically, it's going to be all over the place. Do a regular tune up(cap/rotor, plugs, wires), and check the condition of the main grounding strap from the head to the firewall. Also very likely your CPS is on its way out. I bet cruiser will pop in with his ground refreshing tips, I recommend you follow those as well. Link to comment Share on other sites More sharing options...
cruiser54 Posted May 23, 2013 Share Posted May 23, 2013 Click on the link below. And, do the tune-up stuff as recommended. Link to comment Share on other sites More sharing options...
HOrnbrod Posted May 23, 2013 Share Posted May 23, 2013 Are you running the Renix system or Chrysler HO w. the 94 engine? Link to comment Share on other sites More sharing options...
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