On both my 2001 9-3 and my 2003 9-3 when you start them once in awhile you'll get a rough idle where the cars fighting to get up to speed. On the 2001 93 SE the car is been restored. The motor was taken out all the seals were done , new timing chain, the head was tank'd, and all new valve seals and had gasket. The car has a brand new OEM ignition cassette. NGK laser Platinum. I've had the throttle body off and it's spotless. All the rubber hoses in the car have been replaced with new ones. I know the throttle position sensor can start to go bad and not throw codes I've seen it happen before. I've got an aftermarket throttle body sitting around that's like brand-new I pulled off a car that junkyard I was thinking about switching out just to see if anything changes. It doesn't happen all that often just once in a blue on the 2001. However on the 2003 it happens almost every time you start the car. I've already done ignition coil spark plugs on that car as well throttle body is spotless. It was having a rough time starting and I took out couple of the grounds the one on the transmission the one that's under the window washing reservoir on the body of the car and clean them and put them back in and they seem to help the starting of the car I feel like there's still a few grounds I need to locate and clean on that vehicle. But something is telling me that this problem on the start is not because of a bad throttle body or a bad TPS. Both cars have the original idle air control valve and they're both clean. Both cars are throwing no codes. Obviously it's got to be in air fuel mixture problem on the start. I'm guessing since it's getting fuel and all the injectors are fine I've already done a noid test on both vehicles it's got to be air. Does anyone know why this would be happening. I'm not too familiar with the idle air control but I've been thinking maybe it's got something to do with this considering I think it's the air going to the throttle body that's in question. Is there a way to check the idle air control. The positive crankcase ventilation on both vehicles has been redone from top to bottom. I'm really just kind of stumped if anybody is dealt with this before found a way to overcome it I'd love to know. I'm also pulling apart my first ABS module I have a couple bad ones laying around. I cracked the case on the first one getting it apart I'm guessing you have to maybe bake them in the oven to loosen up the glue. Has anyone ever taken one apart and resolder the connections. I know from experience that when you send them out and have them redone they usually don't last that long maybe about a year before they start going kaput on you. however it's getting harder to find parts at the junkyard they're not coming in like they used to so maybe it's time to figure out how to fix these things by myself. Thanks a lot fellas I'm just about to put a stage 1 tune on the 2001. just want to make sure everything's okay before I do that. Any help would be greatly appreciated.