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enter image description hereSo, Last year my 94 Acura Integra AT passed emissions by the skin of its teeth, this year it won't pass, I have noticed in past year and half that dropped from around 30mpg to about 15mpg. Some times last year I would be parked idleing and everything would be normal, car would just shut off for no reason. Also when I start the car you can tell it is dumping fuel as the engine shakes and has rough idle on start, sometimes it takes more then 10 seconds to start when turning the key. I have replaced everything on the car but the ECU, I have the following new:

  • Catalytic Converter
  • Spark plugs
  • Plug wires
  • Distributor
  • Fuel filter
  • Fuel pressure regulator
  • Injectors
  • TPS sensor
  • Ambient air temp sensor
  • O2 sensor
  • Complete intake clean and new gaskets
  • New air filter
  • Pcv valve
  • IAC
  • New timing belt and timing adjusted accordingly
  • Valve adjustment to OE spec

And whatever else there is.

Brandon Beecher
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1 Answers1

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Does it show a check engine light (CEL)? Search for Integra CEL ECU Codes and you will find instructions to show any system codes and take appropriate action.

If you aren't getting a CEL then replacing the ECU won't hurt. Very weird symptoms could be ignition or fuel. Difficult to imagine what else it could be based on what you've already done.

The next step is to get the factory service manual and test all the sensors for operation within specification. Just because parts are new doesn't mean they are operating within spec.

Good luck!

Tim Nevins
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