K-n-L Country Farms
Member
Got a 99 Ford Ranger with a 2.5L engine which is a 4 cylinder with (2) 4-wire coil packs, 8 spark plugs and 8 wires. Starts up no problem. Runs rough at idle but will smooth out after pressing the gas pedal down about an inch. Drove it through town and ran rough from stopped at red light up until about 35mph. Got onto the highway seemed to pick up speed fine and running good at highway speeds. Got off of highway and started up a hill and couldn't do more than 10mph even with the pedal to the floor.
Ran the OBD2 test and showed misfire codes for cylinders 2 (PO302) and 3 (PO303) which on a 2.5L the cylinders are numbered in a straight line and in numerical order starting with 1 in front of engine and so ending with 4 in the back of the engine.
Previous owner never did a tune up in the 100,000 miles he put on it and so I checked the coil packs first but all 8 are firing properly. Replaced all 8 plugs and wires with Ford Motocraft and it still runs the same way.
Didn't notice any antifreeze in the motor oil or motor oil in the antifreeze. Cleaned the MAF sensor and didn't find any vacuum leaks.
So why would it run rough at idle, run smooth at higher speeds, lack power on hills, and codes only show misfires at cylinder 2 and 3?
At my wits end and really need help since this is our only vehicle and only way to get anywhere. Can't even drive it to a garage if we could afford the cost of the repair(s).
Ran the OBD2 test and showed misfire codes for cylinders 2 (PO302) and 3 (PO303) which on a 2.5L the cylinders are numbered in a straight line and in numerical order starting with 1 in front of engine and so ending with 4 in the back of the engine.
Previous owner never did a tune up in the 100,000 miles he put on it and so I checked the coil packs first but all 8 are firing properly. Replaced all 8 plugs and wires with Ford Motocraft and it still runs the same way.
Didn't notice any antifreeze in the motor oil or motor oil in the antifreeze. Cleaned the MAF sensor and didn't find any vacuum leaks.
So why would it run rough at idle, run smooth at higher speeds, lack power on hills, and codes only show misfires at cylinder 2 and 3?
At my wits end and really need help since this is our only vehicle and only way to get anywhere. Can't even drive it to a garage if we could afford the cost of the repair(s).