Originally Posted by RoMiLex
Can I get more input before digging into my engine for 20 hours?
Did you figure this out yet? My 98 gs400 threw p1346 and p1351 code after I bought it. The car drove fine for 100 miles. Checked the timing and the timing was off but ran smooth. Lined the cams and everything up and everything sound better. Than started to give me the same codes. Cleared it, drove it for 10 minutes and it was good but came back. Don't know what to do.