I just purchased a 1983 Mazda rx7 12a engine 5
speed Manuel. Car won't go passed 60 and is
having trouble reving passed 3k rpms. If anyone
can help ide really appreciate it, thank you
These engines need to breathe to run, so check the air filter and filter assembly for any restriction, if all clear there then you need to have the exhaust system pressure tested, could be a restricted catalyst, exhaust pipe internal collapse, muffler restricted. That engine should be able to hit redline very easily.
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