Jerking while driving

2003 CHEVROLET IMPALA
161,500 MILES • 3.8L • V6 • FWD • AUTOMATIC
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DANIEL WILLIAMS2
  • MEMBER
  • 3 POSTS
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.
Mar 28, 2017 at 8:56 AM
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CATAFINA
  • ✓Experienced 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

Mar 28, 2017 at 9:37 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
Also, clean throttle plate on both sides and IAC hole with choke cleaner.
Mar 29, 2017 at 12:22 AM
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DANIEL WILLIAMS2
  • MEMBER
  • 3 POSTS
Would any of those set off the check engine light? Mine has not come on at all.
Mar 29, 2017 at 7:24 AM
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HMAC300
  • ✓Experienced 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.
Mar 29, 2017 at 8:12 AM
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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.
Apr 5, 2017 at 9:38 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
I kind of doubt it but it is possible, but if an engine does not run right neither will transmission.
Apr 5, 2017 at 10:44 PM
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