85 chevy 4.3 liter v6

Asked by Dec 30, 2016 at 10:03 AM about the 1985 Chevrolet C/K 10 Standard Cab SB

Question type: Maintenance & Repair

Got bad gas at pick quick it runs rough in
park and in drive I put veet water remover
fuel stabalizer and octane boost checked
egr it had some carbon I cleaned it.  I had to
raise the idle and timing please help

2 Answers


did it start running ruff after you put the bad fuel in it ? if so it could be a bad fuel filter or you say you have a carb. not fuel injection there are filters in some carbs. where the supply lines hook into .check to see if you have a vacuum leak you can use starter fluid to do this by spraying around the base of the carb. and intake manifold check pugs and wires cap and rotor this is what I would try first if you do this in steps you can eliminate a lot and save money by not buying what you did not really need hope this helps you some gene


Might be time for a carburetor rebuild. Remove the spark plugs and inspect them. If they're all black with carbon it's running too rich. If they're white it's running too lean. When was your last tune up (new spark plug, spark plug wires, distributor cap, and distributor rotor)? Your truck needs a tune up every 30 months or 30,000 miles, whichever comes first. HTH. -Jim

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