Is there a way to see if the timing chain on my 1991 Ford Ranger 4.0 OHV has jumped time? The truck died coming off the interstate, no codes, I've replaced the Ign Module, crank sensor, coil pack, and MAF sensor,,, and I'm tired of throwing parts at it. It has the classic "jumped time symptoms" you can hear it fire in the exhaust, and every now and then a backfire through the throttle body...... With no distributor to index the timing, I'm lost and really don't want to pull down the front of the motor to find nothing wrong!!!!!!!!! Any help would be greatly appreciated!!!! .