98 T/A rough idle

[gm94]

Hi all. This my problem. My 98 TA is having problems with idle. When the vehicle is running is fine. When i'm at idle is a little rough not so bad but recently it started to jerk for like 1/2 a sec like it is going to shut off but it doesn't. The problem doesn't happens all the time but not at the same time intervals. I did notice it more when I stop at a red light. The car had a full tune up (oil, transmission, differential), all filters (air and fuel). There is no codes on the scanner. No check engine light either. I replaced the plugs and wires not too long ago. They were after market ones but look exactly like the original ones. I cleaned the TB with some TB cleaner. I haven't cleaned the MAF sensor but I will as soon as I buy the special cleaner for that. I use seafoam on each oil change. I put one in the gas tank. I do not hear any vacuum leaks but I need a gauge to make sure.

It is not that bad but the the hard jerking like is going to shut off is concerning me. I have been thinking of maybe cleaning the Idle Control Unit but I'm not sure. Any suggestions or things to try ? Thanks.

[wrightz28]

Originally Posted by gm94

. I have been thinking of maybe cleaning the Idle Control Unit but I'm not sure. Any suggestions or things to try ? Thanks.

THAT, is my suggestion biefore slinging parts around.

[gm94]

Ok I cleaned the idle control unit and the MAF sensor. The idle control unit was pretty dirty as well as the MAF sensor.
My iddle is a lot better now but it is still doing the 1/2sec stall like it wants to shut off but it doesn't. Again no codes in the PCM. Don't know what else to try.
I'm going to try to check the fuel pressure and see if it might be problem.