"It's a little bit early to get frustrated," Johnson said, "We just have to remember we're doing the right things. We're putting shots on goal."
Former Montreal coach Jesse Marsch left by mutual decision after last year's inaugural season, and the Impact brought in Schallibaum, a veteran who coached nearly 10 years with five clubs in the Swiss league.
"The group today was good together," he said. "That's a very good sign for the coaches."
Porter, meanwhile, came to the Timbers after seven seasons coaching the University of Akron, leading the Zips to the NCAA championship in 2010.
"We can't get too low here," Porter said. " But we also have to wake up and work on some things."
Portland's Darlington Nagbe, who played for Porter at Akron, got his first yellow card in 63 MLS matches with a tackle on Andrea Pisanu in the 30th minutes. Felipe was yellow-carded in the 73rd minute.
Montreal plays its home opener next Saturday against Toronto FC. The Timbers travel to play the rival Sounders in a Cascadia Cup match next Saturday.
"Maybe a darby is just what we need to play a little better physically and mentally," Timbers midfielder Will Johnson said.