I was hoping to get some direction on here. I installed a new 3.8 in my 07 Jeep Wrangler and finally got it to fire up, just for it to sound like an old tractor. It does hesitate to start but I think that might be a faulty cam sensor as it is the only cel code that is coming up (will be replaced soon). As for it sounding like it does I am at a lost for what to look for next. I have checked exhaust manifolds to see if they are cracked and they are in good condition. Hoping someone can point me in a direction on some things to check. Thank you
