1999 WJ Starting Problem
03-23-2013, 10:44 PM
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Model: Cherokee
1999 WJ Starting Problem
Hi all, I just swapped a 4.0 into my 99 WJ. The original engine had 02 sensors over and under the mini cats, the new engine did not. I used the intake and throttle body from the new engine and stayed with the original 02 setup. when I started the engine it started right up but went to full throttle immediately. Would this be due to using the new engines throttle body or could it have something to do with the cam position sensor since it also got transferred to the new engine ? 
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