Fred Onyedinma made it two goals in as many games as the Millwall loanee helped Wycombe to 1-0 win over York at Adams Park.The 18-year-old converted from close-range just after the break as the league leaders stretched their unbeaten run to eight matches. Wycombe dominated the first half but found debutant goalkeeper Bobby Olejnik in fine form for the visitors. The Peterborough loanee was quick off the mark to block efforts from Onyedinma and then Marcus Bean, before diving to push away Aaron Pierre's close-range header. Keith Lowe flicked over for York before Olejnik was at it again, this time keeping Onyedinma out with his legs as the Wycombe forward looked set to open the scoring. But it did not take the Chairboys long after half-time to break the deadlock with Onyedinma heading in following Sam Wood's volleyed cross after 47 minutes. Marvin McCoy's deflected long-range effort was superbly tipped wide by the largely untroubled Matt Ingram as York tried in vain to halt a third straight Wycombe clean sheet.