My 97 TJ just started having problems when starting in the morning. Takes a couple tries to turn over and once it does it idles rough and if I give it gas it sputters and stalls. It is also backfiring if I get it going slowly down the road. I really have to baby it the first few miles but once I get going it runs fine. Any thoughts? I have had the intake and exhaust manifolds replaced in the last 6 months and one mechanic said it did this because of water in the distributor and he put some sealant on to fix it. But obviously that didn't work if that was the cause.