1990 Ford Mustang Check Engine

1990 FORD MUSTANG
210,000 MILES • 4 CYL • 2WD • MANUAL
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GHIBBITS
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When under about 1800 rpms, my check engine light comes on. When over, it goes off. Is this just a wiring problem?
Oct 4, 2010 at 7:05 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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