RGN14
26-05-2001, 22:24
I recently bought a 1985 200SX with a blown CA20E engine. The car was in good shape, A/T, FI, loaded and I only paid $300. I ordered a used engine (one that had been shipped from Japan) and installed it (it couldn't have had too many miles on it). The new engine had a carburator and manual transmission (clutch hardly worn), so I put my old FI intake manifold on the new engine.
Everything fit just fine, harnesses, vacuum hoses were all in the same place. I changed the plugs, wires, etc. The car starts and runs great, especially on the highway, but I was getting terrible gas mileage (12 mpg, or so). I have checked everything that I can think of, including the timing and have changed the fuel filter, O2 sensor and now I am getting around 16-18 mpg. Any ideas? I know I should be getting 25-30 mpg. The car hesitates a little on acceleration, but runs great at speeds higher that 45. What have I missed? Sensors? Does it make a difference that the new engine came off of a car with M/T and carburated intake? Any help would be greatly appreciated. thanks.
Ryan
Everything fit just fine, harnesses, vacuum hoses were all in the same place. I changed the plugs, wires, etc. The car starts and runs great, especially on the highway, but I was getting terrible gas mileage (12 mpg, or so). I have checked everything that I can think of, including the timing and have changed the fuel filter, O2 sensor and now I am getting around 16-18 mpg. Any ideas? I know I should be getting 25-30 mpg. The car hesitates a little on acceleration, but runs great at speeds higher that 45. What have I missed? Sensors? Does it make a difference that the new engine came off of a car with M/T and carburated intake? Any help would be greatly appreciated. thanks.
Ryan