2000 Chrysler 300 getting code of FDA253

Tiny
HOPPYAUTOMOTIVE
  • MEMBER
  • 2000 CHRYSLER 300
  • 151,250 MILES
RUNS ROUGH CHANGED COMPUTER NOW WILL NOT RUN AT ALL CHANGED TO OLD COMPUTER AND WON'T START WHEN RUNNING WE GOT THE CODE, VEHICLE CAME INTO OUR SHOP FOR RUNNING ROUGH. IT HAD A CHECK ENGINE LIGHT ON AND WE SCANED IT AND FOUND CODE FDA 253 WHICH IS FOR A DESIL NOT A GAS ENGINE WE CHECKED ALL SENSORD AND RELAYS ALL WERE FINE TPS ETC RE INSTALLED THE ORIGINAL COMPUTER AND NOW IT WON'TUN AT ALL?Help
Monday, September 16th, 2013 AT 2:45 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 34,184 POSTS
I assume you checked the basics already, but to be sure, did you check for spark and is the fuel pump running for one second when you turn on the ignition switch? Also, since the Engine Computer was unplugged, whatever is in there now needs to relearn "minimum throttle" before it will know when it has to be in control of idle speed. Until that is done you may need to hold the accelerator pedal down 1/4" to get the engine to start and to keep it running.
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Tuesday, September 17th, 2013 AT 3:02 AM

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