Jerking while driving

Tiny
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

Tiny
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
Tiny
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
Tiny
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
Tiny
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
Tiny
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.
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Wednesday, April 5th, 2017 AT 4:38 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I kind of doubt it but it is possible, but if an engine does not run right neither will transmission.
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Thursday, April 6th, 2017 AT 5:44 AM

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