2000 Cadillac Deville 2000 Deville OBDII codes P0302, P0101

Tiny
00 DEVILLE DHS
  • MEMBER
  • 2000 CADILLAC DEVILLE
2000 Cadillac Deville V8 Automatic 120000 miles

Where do I start with this wonderful car?

Pulled codes P0302, P0101 and P0102. (We realize what the codes mean, just any suggestions for repairs we can try?) We've replaced spark plugs. The car cranks, but won't start. Has around 120K. Also, have checked for leaks, cracks. Etc. Nothing. (My husband has replaced so much and spent countless hours on this car) and it has gotten worse, I'm just hoping it'll get better soon!

Any help would be GREAT! PLEASE!
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Thursday, February 5th, 2009 AT 5:52 PM

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Tiny
FACTORYJACK
  • EXPERT
Have you had the fuel pressure checked, the fact that it won't start may, or may not make the codes relevant. How long has it been since it had ran, and was there a misfire or rough run felt(p0302 misfire #2). The two codes that relate to the mass airflow sensor are suspicious. Try and get it to light off on some starting fluid through the throttle body, if it starts and runs for a minute or so, you could have a fuel problem. You could also have a plugged catalytic converter not allowing air to be drawn in, if it can't exhale, it won't inhale. Check to see if you have injector pulses on at least 1 injector, and if you have good fuel potential. If all is good, I would say disconnect the exhaust pipe before the converter and see if it will start then. Fuel pressure should run 40-45 psi. It is capable of running with the MAF sensor disconnected, it just substitutes a value, so I don't see a need to replace it yet(unless it's too late).
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Thursday, February 5th, 2009 AT 10:45 PM

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