car jerks at high speeds on 1994 Ford Tempo

hi my 1994 ford tempo jerks when I reach in between 45 to 50 mph, it somtimes feels like it wants to die at these speeds, and just in the last couple of days eveytime i put in reverse it acts like it want to die on me and had it die on me a couple of time when i put on my brakes to turn. can anyone tell me what might be happening? I already checked for loose or damaged hoses but there wasnt any.

by in Wathena, KS on November 14, 2009
2 answers 1 comment
ANSWER by on November 15, 2009
I assume it is a 4Cyl. Have you checked fuel pressure? More info would be helpful. The other things below generally likely causes. Spark Plugs - Worn, cracked, incorrect or defective spark plugs can cause a misfire or buck and jerk under load. Inspect and replace as necessary. Spark Plug Wires - High resistance, open or leaking plug wires or wire boots can cause an engine to misfire or buck and jerk under load. Test and replace as necessary. Mass Air Flow (MAF) Sensor - A dirty or defective MAF can cause an engine to misfire or buck and jerk under load. Inspect, clean or replace as needed. Vacuum - A vacuum leak or any air leak after the mass airflow (MAF) sensor can cause an engine to misfire or buck and jerk under load. Overlooked Causes Engine Mechanical - Valve train problems or broken or loose vibration dampers can cause an engine misfire or buck and jerk under load. Inspect and repair as needed.
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COMMENT by on November 12, 2010
BEST answer I've seen for this problem. I cleaned the MAF sensor and seemed to help.
ANSWER by on April 18, 2010
Hi I have a 1999 ford ranger 2 wheel drive 3.0 liter. My water pump is leaking out of the weeb hole. Could a bad water pump cause a truck to jerk when driving. I've changed the wire cables spark plugs air filter the other day. please let me know. thanks from Jm
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