1993 Chevy S-10 runs ok then blows black smoke etc.

1993 CHEVROLET S-10
148,000 MILES • 6 CYL • 4WD • MANUAL
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CLARENCE ANDERSON
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  • 1 POST
it will stumble and die then will restart in clear flood mode! it has a dtc 15 and has put a dtc14(14 is high temp.and 15 is low temp.) . the dtc 15 is very concistent.I checked the temp. sensor and it shows 5 volts when unplugged and the resistance is 400 ohms warm and 4.4k cool! I added two bottles of gas dryer at first ,thinking I had bad fuel!
thank you
Jul 16, 2008 at 9:22 PM
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MMPRINCE4000
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  • 8,548 POSTS
Best thing to do is to hook it up to a scan tool to see what the ECM is reading. Low temp should be about -40 degrees. The ECM is seeing a sensor failure and substituting a default value.

Check the wiring to the CLT sensor and I would change it. If the sensor and wiring are good, it may be a bad ECM.
Jul 18, 2008 at 5:14 AM