Jerking while driving

DANIEL WILLIAMS2

MEMBER
2003 CHEVROLET IMPALA
3.8L
V6
FWD
AUTOMATIC
161,500 MILES

While driving down the interstate at a set mph and rpm, my car will randomly jerk. It also idles rough and the rpm's will drop sometime after pressing on the gas.

Tuesday, March 28th, 2017 AT 3:56 PM

6 Replies

CATAFINA

MECHANIC
98 POSTS

Start by checking the fuel pressure. Could be a fuel filter or the fuel pump.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

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Tuesday, March 28th, 2017 AT 4:37 PM

HMAC300

MECHANIC
48,601 POSTS

Also, clean throttle plate on both sides and IAC hole with choke cleaner.

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Wednesday, March 29th, 2017 AT 7:22 AM

DANIEL WILLIAMS2

MEMBER
3 POSTS

Would any of those set off the check engine light? Mine has not come on at all.

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Wednesday, March 29th, 2017 AT 2:24 PM

HMAC300

MECHANIC
48,601 POSTS

No low fuel pressure does not always set off a code like that. Or have a mechanic scan for codes and freeze frame and take readings of sensor maybe one is low.

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Wednesday, March 29th, 2017 AT 3:12 PM

DANIEL WILLIAMS2

MEMBER
3 POSTS

Going to try these Friday, hopefully it fixes it. I was wondering, from the sounds of this could it be a transmission problem possibly? I am really hoping it is not.