car jerks about 4 times as I release the gas pedal at about 70 mph

2002 MITSUBISHI GALANT
145,000 MILES
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DYNAMO500
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It then resumes a steady speed. I thought it might be the fuel injector so I put in a fuel injection cleaner into the gas tank before I filled it the last fill-up. I thought it had worked, but alas, today it happened again on my way to work. This has been going on for about a week and a half. I realize it may need more time to clean or more than one tank of gas. Suggestions as to the problem.
Feb 25, 2012 at 9:07 PM
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HMAC300
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try cleaning the throttle plate on both sides as well as the iac hole. replace duct work and start car. then check your fuel pressure an dfor a vacuum leak. scan the engine to see if there are any codes.
Feb 26, 2012 at 12:03 AM