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About 3 months ago I swapped my 97 corolla 1.6 engine with a 1.5 JDM engine (the old one was blown). The engine vibration appeared afterward. Here are the characteristics of it:
1. Strong vibration in D and R gears when the engine is on. But the vibration disappear when the RPM goes up, and the car moves.
2. Park and Neutral gears have little or no vibrations (at least, much better).
3. After the engine is warm, the vibration will be reduced significantly.
4. Low city MPG. 1.5L engine is supposed to have about 23 to 26 fuel economy. But my car has only 17-18!! However, highway MPG is 42.
5. I can smell the gas odor inside the car every morning I start the engine.
6. I see little water dipping from the exhaust tailpipe in cold weather 25-30F.
7. If I turn off the headlights and fog lights, the vibration will be reduced a little bit.
Here are what I have done so far, but the vibration still exists:
1. I have replaced ERG valve.
2. New spark plug and wires.
3. cleaned the Fuel Injector at Wal-Mart.
Can someone tell me what is the most possible issue causing the engine vibration? I will appreciate any idea you share with me.
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∙ 15y ago
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