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Old February 9th, 2013, 11:52 PM   #1
CHEROKEEMUDMAN01
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Default need electrical help with k5 blazer

helping blazing40's put another blazer togher after his last one got totaled. his old one was a 86 but still had a computer behind the glovebox. the new one also has the computer and its an 87. i thought the 87 was when the k5's went to tbi. but what is the computer doing in a carb model 86? i an backdatine the 87 since it was bought with no motor so he can run his carb 350 in it. im not shure what the box is doing behind the glovebox and what it controls. any help is appricated thanks guys
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Old February 10th, 2013, 06:35 AM   #2
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I don't see the problem? Maybe its too early...
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Old February 10th, 2013, 09:05 AM   #3
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86 models had a electronic q-jet carb and electronic timing control for the ignition. thats about all they did. 87 is when they started TBI.
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Old February 10th, 2013, 09:21 AM   #4
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^^this
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Old February 11th, 2013, 03:22 PM   #5
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It was not an electronic q-jet, the carb had a solenoid that would divert 1/2 of the extra fuel pushed by the accelerator pump, otherwise it functioned as a standard q-jet. The box behind the dash controled the Electronic Spark Control - pulled the timing back when the engine knocked, and allowd the solenoid to be energised once the engine temp was up to 170*. Neither were necessary to allow the engine to run.
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Old February 13th, 2013, 12:57 PM   #6
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good then ill remove the box behind the dash and that part of harness. trying to get rid of all the tbi stuff of the 87. thanks guys for help
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Old February 27th, 2013, 08:10 AM   #7
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Can all that stuff be removed without affecting any gauges or whatever else?
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Old February 27th, 2013, 08:42 AM   #8
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yes. it serves no purpose to the gauges.
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