Want this question answered?
Try changing the Oxygen sensor, faulty sensor is the cause of a lot of hesitation on engines like these (20V Blacktop)
Hesitation can be caused by several things: 1. A faulty throttle position sensor might cause hesitation. 2. A faulty MAP or MAF sensor might also cause hesitation. 3. A problem with the engine control module might cause hesitation.
Hesitation Definition: When the throttle peddle is pressed the engine fails to respond, and may stall. For this to be true it is idling correct. No, a failed, stuck or gummed up IAC will not cause the hesitation. The gummed up may if it has blocked any of the small passages in the throttle body. It is much more likely you have a bad plug, plug wire, Oxygen sensor, Temp sensor, Bad MAP sensor or other problem.
Bad plugs, wire , or coil pack.
A malfunctioning oxygen sensor can cause the engine to be low on power.
Not directly. The oxygen sensor measures oxygen levels in the exhaust. The computer uses that to calculate fuel and spark timing. If an oxygen sensor is malfunctioning, it could cause idle problems.Not directly. The oxygen sensor measures oxygen levels in the exhaust. The computer uses that to calculate fuel and spark timing. If an oxygen sensor is malfunctioning, it could cause idle problems.
Yes, my grand am had that problem a week ago, changed out the sensor and it runs like a champ!
1) Yes.2) No.Fuel injected:Most likely is the hesitation has another cause such as a bad TPS, MAF or MAP that has lead over time to oxygen sensor damage. With a bad oxygen sensor, your ECU has lost it's fuel learn parameters and made the hesitation problem worse.Carbureted:More likely is a minor leak inside the carburetor causing the hesitation and this may have also caused damage to the oxygen sensor. Rebuild the carburetor and replace the oxygen sensor at the same time.Answeryes and no... the purpose of the O2 sensor is to monitor the exhaust gasses to ensure that the exhaust is within tolerance of federal regulations (to make sure you're not polluting). On later model vehicles, the O2 sensor plays a part in controlling your fuel/air ratio, depending on what the O2 sensor sees, it can make the engine run rich, giving you more power in some cases, but trying to flood the engine when you floor the pedal. Which sounds like the problem in your case.if your 02 sensors are bad your check engine light would be on.
Yes. A bad cam sensor can cause slight hesitation of the vehicle, ultimately resulting in complete loss of power suddenly while accelerating. If bad, the cam sensor worsens, possible causing the vehicle not to start.
Change the plugs and wires. also check the throttle position sensor or have it tested
It sure can.
Possible, but not likely.