1994 Buick Lesabre, 230,000 miles. 3.8L V-6. When engine sits overnight, starts fine and no SES light. Drive it until it is good and warm (20-30 miles) and shut it down for 45 minutes, it will not start. Wait for another 10 minutes and it starts, but the SES light comes on and stays on. When the SES light is off engine runs smoothly, with the SES light on, it skips just ever so slightly. Had it scannned -- these codes were on the scanner:
361 EST line not toggling
321 No 18X ignition pulses
Looking at the forums this seems to be a recurring problem with Buicks. Any help would be appreciated.
Hey I have a 94 with 146000 on it
try replacing the crank shaft postioning sensor And the camshaft positioning sensor. I'm not 100% on that but it's a start. Mine had the pcm go in it. I replaced it and it runs freat other than some surging under full thrtl.
Hope it helps.