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Major EFI problem

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Old Nov 7, 2005 | 07:57 PM
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apropos
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Major EFI problem

1996 Mazda 626 ES 2.5L auto. (It's nearly identical to Ford Probe)

I replaced the starter, which entailed disconnecting the throttle body and stuff around it like fuel lines, coolant lines, accelerator cable, etc. When I got everything back together, the starter worked but the vehicle will not idle and runs very rich. I pulled the codes and I got:

P0100 - MAF circuit malfunction
P0110 - IAT circuit
P0125 - "Excessive time to enter closed loop fuel control".
PO135 - O2 sensor heater circuit malfunction
P0300 (Or PO303) - Random misfire detected on cylinder 3 - I replaced that spark plug and cleaned up the oil in its cavity so I don't think it's an issue anymore)
P1170 - Heater O2 sensor (Front RH (Inversion))


Any idea what any of this means? The car runs horrible, does not idle (goes anywhere from 0 to 2000 rpms) and gets less than 20mpg on highway instead of close to 30mpg.

I pulled the MAF sensor and looked at it, although not sure what I was supposed to look at.
 
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Old Nov 15, 2005 | 02:36 PM
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FTE Ken
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May want to try a Mazda or Probe web site. This section is dedicated to aftermarket chips and tuners.
 
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