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The car idles fine. When driving at at a slow acceleration no problem. but at faster acceleration car will miss,hesitate. Driving steady speed no problem. If put in neutral and step on gas engine will miss or hesitate. I have tested Coils and ignition control module checks out ok. Was wondering if the catalytic converter might be the problem. Thank You Calvin

Answers from the Automotive Experts

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Calvin, Without seeing the vehicle, it's hard to say. Here are a couple things you could check. O2 sensors - if they are reading incorrectly they could be causing the vehicle's computer to supply less gas, which my cause a hesitation. The fuel system - you could check the fuel pressure, fuel pump and the injectors. The ignition system - since you've checked the coils and ICM, I would suggest you look at plugs and wires as well. I'm surprised that you're not getting a check engine light on. Here's a site to read about catalytic converters and how to tell if they are bad. http://auto.howstuffworks.com/question482.htm Lori Johnson

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