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1983 gmc truck running rough and black smoke - S-15 GMC Cars & Trucks

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  • 20 Answers

Put a carb kit in it, float is probably saturated causing it to run rich all the time.

Posted on Jun 26, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

cadman000
  • 607 Answers

SOURCE: Stalling and black smoke

Your truck is fuel injected . Black smoke indicates a rich fuel mixture. This could be caused by numerous items. A faulty sensor, a faulty injector, a misfiring spark plug are some of them. To really zone in on the problem, a computer diagnosis is required to note sensor readings, and repair as necessary.

Posted on Mar 30, 2009

  • 9 Answers

SOURCE: runs rough, black smoke, computer bank 1 burning too lean

Sounds like bad injectors, bad O2 sensors, and or too much fuel psi. Check the fuel psi against what the service manual says. If the fuel psi is too high, your regulator is bad. If the fuel psi checks out ok, you likely have a bad O2 or bad fuel injector(s).

Posted on Apr 15, 2009

  • 5495 Answers

SOURCE: 02dodge ram ,running rough, black smoke out exhaust

Take it to an Autozone or O'Reillys and they will test the computer for you. It should have set a code, but you don't know if the code light works so its your best bet. Sounds like it is running rich and the crankshaft module is not advancing the timing.

Posted on May 11, 2009

Sergey2121
  • 46 Answers

SOURCE: 2004 DODGE Ram 1500 4.7 truck runs rough black

Search for vacuum leaks. Could be your head gasket, or oil rings. Black smoke = oil is being burned. Which would mean that either your oil rings are worn out (for whatever reason, since your truck is fairly new) or that you have a head gasket problem.

Posted on Jun 04, 2009

  • 157 Answers

SOURCE: I have a 1983 toyota pickup truck.the truck has

possible check vacume hoses if its hookup properlly

Posted on Nov 24, 2009

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1983 oldsmobile cutless supreme blows black smoke in back fires gas runs fast. it ran fine bout 3weeks. itz runing back rough.already put a tune up on it. took one of tha plugs out in it was black.


Check for a worn out timing chain

Then when that has been replace, check the
distributor timing & wires.

Check for leaking injectors
May have to mail them away to be cleaned

Sep 05, 2013 | 1983 Oldsmobile Cutlass Supreme

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1998, gmc,K2500, 5.7l, 250,000km, starts good but idle is very rough and lots of black smoke, lots of power, runs good, but again, lots of black smoke. After you run the truck for awhile, idle is good, but...


A bad coolant temp sensor for the ECM will cause that problem ... they are cheap and easy to replace. One other possibility is a piece of carbon stuck in the EGR causing an internal vacuum leak ..
Good luck.

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1993 gmc sierra 5.7 starts rough, black fuel smoke, smooths out and runs fine after 15 secs.... changed egr ealve not solenoid thinking map sensor? help


When you shut off the motor, see if fuel is dripping from the injectors. It sounds like one might be leaking.

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2 Answers

Black smoke coming from a 250 GM inline 6 exhaust pipe, then ran rough and now has quit and will not start


you don't say what year, if it has a carburetor it's flooding (Needs a new float) Way too rich

remember this
Blue smoke OIL
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Aug 30, 2009 | 1983 GMC Jimmy

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