What would make it run ruff? I have put new spark plugs and wires and coil but still runs ruff.
Oct 28, 2010 at 7:51 AM
1999 Ford Explorer runs ruff
1999 FORD EXPLORER
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Engine running rough or misfiring can be cause by the following:
1.Defective spark plug
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
1.Defective spark plug
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
Oct 28, 2010 at 8:03 AM
Wouldn't most of those make the check engine light come on? It dose not come on it was on and give the codes 0305 , 0306 but that is not there now I put new plugs and wires and new coil. The light dose not come on now but still runs ruff. Thanks
Oct 28, 2010 at 11:09 AM
Don't always trust that idiot lite to come On and tell you something
Check those cylinders -compression and injectors
Check those cylinders -compression and injectors
Oct 28, 2010 at 3:14 PM
I got the cylinders -compression and injectors test done and they was all good and vacuum test all good.
Nov 3, 2010 at 11:26 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.