1986 Chevy Monte Carlo Service engine light

99,228 MILES • V8 • 2WD • AUTOMATIC
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MATT86SS
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  • 2 POSTS
I just bought an 86 Monte Carlo with a 5.0L 305 V8 and it sounds like it runs great, the only issue is that the service engine soon light is always on. I can't seem to figure out why? Any suggestions?
Feb 20, 2009 at 6:59 AM
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OBXAUTOMEDIC
  • ✓Experienced Mechanic
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[quote:1b6c174664="Matt86SS"]1986 Chevy Monte Carlo V8 Two Wheel Drive Automatic 99,228 miles

I just bought an 86 Monte Carlo with a 5.0L 305 V8 and it sounds like it runs great, the only issue is that the service engine soon light is always on. I can't seem to figure out why? Any suggestions?[/quote:1b6c174664]


Hi Matt,

You will need to get the codes read. You can purchase an obd1 code reader at your local auto parts store for about $30 or so. Or you can order one from us at the link below.

It may just be an O2 Sensor, just wont know till get codes read.

.
Feb 20, 2009 at 7:10 AM
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DAN DEAVERS
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  • 3 POSTS
Matt,

We had a similiar problem. Try to make sure the gas cap is firmly seated. If necessay, get a new gas cap.

Takes about 1 week for problem to go away.
May 20, 2009 at 12:41 PM
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