Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
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Subaru pops when letting off gas
I recently purchased a 1987 Subaru Wagon with a 1.8. The problem is I'll be heavy on the gas, then shift and let off the gas and it pops. What could be causing this? It usually does it when the engines under load and then the load is released. It does it sometimes if I rev the motor and then let off. Anyone have some ideas? I changed the plugs and the gap was at .048" and is suppose to be around .040-.042". So I set the new ones to .042". We also adjusted the timing to 8 degrees. Someone suggested advancing the timing a bit. Should I try this? Also, someone said maybe it's an exhaust leak. How would I know for sure? Thanks!