Engine Performance problem
1992 Honda Prelude 4 cyl Front Wheel Drive Manual 175000 miles
The 2.3L was running smooth a week ago, then suddenly started running as if one cyl. Wasn't firing. Still runs smooth for the first minute after startup, then starts running rough (a very consistent rough though), and you notice it at idle and acceleration, not when slowing down. After stopping and getting out of the car, there's an unusual burning smell.
Since then, I've replaced plugs and distributor, and run some injector cleaner through it but that hasn't helped. The code from engine light is 23, which means Knock Sensor, but that's been intermittent for 2 years and think that's unrelated. So, it seems the remaining possibilities are these three and look for your comment on A) which is most likely, and B) how to isolate in the most effective way.
1. Dirty injector, or failing injector (meaning the solenoid plunger inside the injector).
2. Intake or Exhaust valve that seats when engine is cold, but then doesn't after running a minute.
3. Manifold Actual Pressure (MAP) Sensor (see this in the manual's troubleshooting chart. Expensive part.
have the same problem?
Friday, November 28th, 2008 AT 8:03 AM