My buddy has a 1998 accord LX and it comes with the f23 vtec motor. His dumb *** over headed the car and kept driving for like 10min. As you guys would think the headgasket busted. I replaced the headgasket and other gaskets and now the engine has this sputtering problem at idle and only at idle. after 1000 rpms the engine works fine. I checked the ignition timing and is seems to be off by a little im mean very little. and was wondering if that could be the problem? most would tell me to adjust the timing, however im still confused on how to do that on these engines.

Second a sensor next to the i believe the oil pressure sensor was broken and was wodering if anyone here has the sensor laying around?

thanks you?