Question about 1988 Chevrolet Silverado 2500

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My step son took my truck for an apparent joy ride while drunk, ran it cout of gas, even in carburator, put new fuel in and now it is bogged down, wont stay running, and lots of black smoke pouring out from underneath!!

Posted by mrsakintoo on


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Sounds like a flooded carburetor. Possibly float needle dropped since bowl was not full enough to keep float needle in place. This could be from improper adjustment during carburetor overhaul. When floats are set, some have adjustments for both top cutoff and bottom drop.

Now if black smoke is not from exhaust pipes, you have a bigger problem. Could new fuel be contaminated with diesel? Also depending on carburetor type, the rear barrels of a 4 barrel carb can soot up if the rear barrels are not often open. Some rear barrel actuators are vacuum operated, others are mechanical links.

Some other thoughts are metering rods can be extended and jam if either the seat unscrews or the rod hangs up. Not common, but possible. Free floating rust could jam the metering rod in almost any position. When placing a carburetor on the intake manifold, NEVER turn the carburetor upside down or at any angle that the truck would not normally go. The float pin can slide out of some models.

Also, was the gas used from a 2 cycle engine like a boat or lawnmower that has oil in the gas?

Posted on Sep 17, 2012


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SOURCE: fuel problem

fuel pump is out

Posted on Jul 07, 2008



  • 42 Answers

SOURCE: car will start but wont stay on

Idle adjustment. You didn't state the vehicle, so I will post two possible solutions.

Fuel injected engines typically have an IAC valve in the throttle body. This valve adjusts the throttle plate to be open to a certain extent. The computer can control this valve as need based on the density of oxygen in the air. Remove the throttle body and clean the IAC valve or replace it if necessary. Mechanical (gas engine) experience necessary.

Carb engines typically have an idle adjustment screw on the exterior that may need adjusted. Mechanical (gas engine) experience necessary.

Posted on Dec 30, 2008

SOURCE: lack of power and lots of smoke from exhaust

You've done a lot of work. How does your EGR valve look Its the 'space ship' gizmo under the air cleaner. Remove and decoke is a quick job and it may just cure the lot

Posted on May 07, 2010


Clint Smock

  • 4669 Answers

SOURCE: my chevy c1500 truck will not start or stay started

Have you checked the fuel pressure?

Posted on Jul 20, 2010


Charles Huckeba

  • 1114 Answers

SOURCE: 2.8 s10 new fuel pump working and getting gas up

Have you changed/replaced the MAF sensor?

Posted on Mar 03, 2011

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