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Old 08-17-2010, 05:05 PM   #29
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Join Date: May 2005
Location: Marietta, Georgia
Posts: 4,299
Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Originally Posted by clinebarger View Post
My 85 3/4 ton Suburban had the same emissions equipment, Dual smog pumps, No catalytic converters, No EST, No feedbak Quadrajet, Dual exhaust, Leaded gasoline compatible.

There is a "smog pump control module" on the firewall. Heres a pic of mine, The circle is where it used to be. It grounds the "check engine light" bulb when a fault is detected in the "Air Diverter solenoid" curcuit. Unplug the module, the light should go out.
WOW.....great info...I had just gotten back from some more picture taking and research and took a picture of that little box on the firewall to find out what it was and if that could be the culprit....I plan to give it a shot next time I drive it. As far as mine goes here is some more info......

Stock true dual exhaust with no Y pipe, no cats and no O2 sensor. It is very obvious this is the original exhaust by the shields all over the pipes.

Absolutley no computer behind the glove box.
Attached Images
2001 Chevrolet 2500HD Crew 6.0
1999 Chevrolet Tahoe 4x4
1999 Harley Davidson Electra Glide
1996 Chevrolet C3500 Ex-cab 5.7
1980 Toyota Corolla "Rock-n-Rolla"
1972 Chevrolet C-20 Custom Camper "Dump Truck"
1972 Chevrolet C-20 Suburban "Big Green"
1969 Chevrolet C-50 Wedge Hauler "Leonidis"
1966 C-10 2x4 short fleet 327 4 speed "Race Truck"
1952 Plymouth Cranbrook "Rican" (my grandfathers)
1947 Chevrolet Stylemaster "Cholo"
1931 Ford Model A Tudor "Silverback"
1931 Ford Model A Coupe "Black Beauty"

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