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What's left to fix?! (or try =D)

posted by  dfung on  Sun Jul 3 17:17 CST 2005
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'90 8v 740 is still getting around 13 MPG. I've been getting the 213, 232, and 231 error codes. Idle still seems jumpy, lack of power, and i get a strange blip at 1200 rpms whenever the engine is slowing from 2000 rpms. Thus far, I've...

-replaced O2 sensor
-replaced Fuel Pressure Regulator
-replaced sparks, cap, and rotor
-spark cables ok
-cleaned and resecured ground connections
-checked proper voltages coming from ECT
-No vacuum leaks apparent
-No exhaust leaks
-AMM appears to be fine (car nearly dies when you unplug it)
-TPS adjusted properly
-All fuses fine

I'm about ready to give up and am hoping somebody has some guidance or suggestions.....





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