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Need help with 97 vti-r ECU

 
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Old 12-16-2010, 02:59 AM
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Need help with 97 vti-r ECU

So I've been having fuel economy problems on this car pretty much since i bought it nearly 2 years ago (97 vti-r auto). I've taken it to so many different mechanics and none of them seem to be capable of working out what the problem is. I've had the ECU reflashed once, I've had the O2 sensor replaced, throttle position reset and throttle body cleaned, spark plugs, leads. MAP sensor/coolant temp sensor tested and all are fine. I've had the aftermarket intake replaced with an OEM one, it has been tested for vacuum leaks and there are none.

The car billows out unburnt fuel while driving, the CEL comes on whenever it goes up a steep hill or over 90km/hour, the car has lost a HUGE amount of power at completely random times. When it's freezing cold outside the car runs fairly normally, when its really hot, it barely makes it up hills. It's using more than twice the fuel it was when i bought it.

So i just got it back from ANOTHER mechanic who had it for 2 days, didnt replace or fix anything. All he has given me is more details showing the sensors are all fine, and has told me he THINKS that there might be something wrong with the baro sensor in the ECU. It's reading 2.9r at 100KPa. So now he is telling me that he still doesnt know whats wrong and that he wants to send it away somewhere to get tested.

Assuming it is the baro sensor, does this mean i have to have the entire ECU replaced? If so are second hand ECUs reliable, and would it be possible for me to just do it myself because i'm sick of ****ty mechanics?

I'm at my wits end here, nobody else seems to know how to fix this ****, regardless of how much they charge for it, so any input would be greatly appreciated.
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