03 impala jerks a bit when accelerating


#1

My sons 03 Impala was jerking very bad and check engine light came on. Based on the codes the solenoids were replaced and new fluids put in. However a few days later it started lightly jerking again and you can feel a hard shift into the next gear when accelerating, but the check engine light has not come on. Any ideas on what would cause this issue?


#2

What solenoids were replaced. Starter?

What codes did you get.

New fluids would not have any effect on a car jerking.

Spark plugs, dirty air filter, contaminated fuel, poor fuel pressure, all could.

Yosemite


#3

I’m presuming some transmission solenoids were replaced. But that hasn’t done the job. If the shop has isolated this to the transmission (and presuming an automatic), probably start with a proper transmission service. If it helps but doesn’t fix it 100%, drive 100 miles and do it again. Still got a problem? You need a transmission expert at that point. They’ll probably measure the transmission fluid pressure at several test ports.