Okay a few weeks ago my car died on me and wouldn't start back up. After trying EVERYTHING i finally got a replacement ecu. The car started up almost instantly. But ever since then the car has been acting weird. When I floor it the car only gets up to about 5500 rpms and shifts when it normally shifts at the redline. Also when it is in park and i rev the engine the rpm gauge doesnt stop it keeps going into the red. Could the ecu be junk? or does it need to be reflashed? I need help asap.

Is your car automatic or manual? Did you get a replacment ECU for the corresponding year of your vehicle? Also confirm if it was an ECU for a manual or automatic.

I contributed to the Wiki.

It was an ECU from another eclipse same year and automatic

The 1997 to 1999 dont have Ecu problems. I havent read about anyone having problems. You problem would be the tcu, "limp mode".

Try, pushing your tcu in on the tranny it could be loose.
Oh, I have an automatic and never redline it, only to 5500 when I'm coming off a highway on ramp.

You're risking blowing it up if you redline it all the time.

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1995 gs Saved from the crusher
1998 RS gone to(Dsm Heaven)
1997 gs gone to Dsm heaven

Thanks it only redlines in first and 2nd gear and Ill check the tcu