Sometimes when accelerating it hesitates or seems jerky?

LYNNIE-EM

MEMBER
1998 CHEVROLET BLAZER
4.8L
4WD
AUTOMATIC
250,000 MILES

My vehicle has developed a strange problem. If I give it more gas it seems to resolve the problem. Once it hesitates a few times it doesn't do it again. If I use the top portion of the gas pedal, it happens less. It happens more when it's humid or rainy. Some days it does not do it at all. Any idea what it could be? Any help is appreciated. I'm 9 months pregnant and it's my primary vehicle!

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,949 POSTS

Congratulations on the pregnancy. It sounds like the engine is misfiring which can happen when the engine needs to be tuned up, can I ask if the check engine light is on? If so, you can see by the codes which cylinder is having the problem and just fix that one if money is tight. here are two guides to help us see what's going on and fix the problem:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

and this guide I would do with the tune up:

https://www.2carpros.com/articles/throttle-actuator-service

If you follow these guides, it should fix the problem. Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

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Thursday, August 10th, 2023 AT 12:05 PM

LYNNIE-EM

MEMBER
2 POSTS

The check engine light is on. It's been on due to a bad O2 sensor which we were told we didn't absolutely have to get replaced. I'll definitely get the codes read. Thank you!

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Thursday, August 10th, 2023 AT 12:13 PM

KEN L

MASTER CERTIFIED MECHANIC
42,949 POSTS

Sounds good, let me know if you have any other issues, here is a guide to help you change the oxygen sensor out and instructions for your car in the images below.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the images (below). Please let us know how it goes.

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