Need help with my 3rd Gen

[Juicebox228]

I have a 1999 3.4L V6 and out of no where it has started to make a jerking feel to it. I changed the spark plugs and spark plug wires because I thought that the car was misfiring. I am still having this problem and I can hear it in the exhaust as well. I only feel the car jerking when I am at a stop or when I am decelerating or accelerating. Whatever the problem is, it is not causing a check engine light to come on. Any ideas as to what could be the problem? Thanks for the help!

 

[MX4R]

Check throttle position sensor and idle control valve. Both cause erratic running and usually with no CEL.

 

[eplanajr]

It could also be an injector, my car drove for a while with similar issues and no CEL (it did eventually blip on).

 

[Brian757]

It could be bad gas or a number of things. That is interesting though. Have you given your car a tune-up recently?

 

[Juicebox228]

First, I'd like to say thank you guys for all the help. I haven't been able to work on my car since i posted this but when i started it up this morning it was running so smooth it was as though it didn't even have a problem, but half way to work it started again and when I got to work it smelt like gas. I haven't put in new gas in the vehicle but since that seems like something that will only cost me 1/4 of a gas tank then I will try it this evening.

I have also been reading that a common problem in 3.4L third gens is one of the injectors going out or needing to be flushed. Could that be the problem without throwing off the CEL?