OK guys my? Is I put another used 2.3 in my ranger at first it ran OK then it went to running rough and backfireing I changed the coil packs that took the backfire away but it was still running rough then I stopped working on it for about a week went out yesterday and tried to start it but it would only crank over it sounded like it would try to fire every now and then if I can not get it running I'm going to convert it to a 302 if anyone has any tricks of that job please let me know on the easiest way thank you for any response mike