1999 Ford Ranger engine bucks and the check engine light is on

1999 FORD RANGER
126,000 MILES • 6 CYL • 2WD • AUTOMATIC
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1999 Ford Ranger mileage: 126,000. The engine bucks and the check engine light came on. I have a code 211 read out. Cleared all codes now the only code is 157 MAF sensor low voltage. 998-hardcode fault confirms that it is not the ignition module. All sensors seem to check out okay. What is more specific definition of 998? Could it be the PCM? Or in one of the sensors? Computer seems to always go into open loop. Help please!

Feb 2, 2011 at 9:05 PM
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Code 211 is a profile ignition pick-up that means anything in the ignition system. Since you have eliminated the ignition module, try replacing the ignition pick-up coil. Code 998 merely is telling you that some hard codes have been set in the computer. A plugged catalytic converter can cause similar problems to the ones you are having.
Feb 2, 2011 at 9:06 PM