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Loss of power and blck smoke came out of the tall pipe

A 2003 gmc v6 4.3 zr5 4x4 Sonoma quod cab is my truck. ON new years eve 2013 I took my truck out when it started acting funny. I was 2 miles from were I need too be. When my truck rpms went too 40rpms and I lost speed. So I put the peadel on the floor and my speed went down and black smoke came out of the tail pipe. I made it to my where I was going. Thought it was gust some bad gas so I put fuel stabilizer in it. And it acted normal until half way home and it started doing it agin. and a odder was coming form the tail pipe. so I shut it off waited ten minutes and tried agin. I had to do this 3 or for times be for I made it home. A friend followed me. It happen evey time I was going up or down hill. I just had the thermostat replaced because I had know heat. I had heat for tow day and that day I didn't have any heat agin. I did cheak my oil and it was good and my transmission way okay. my engine is staying at temp. My muffler is also radleing up by the front where it bolts on too the engine some where.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Mike258
  • 1498 Answers

SOURCE: 1997 GMC K1500 4x4 5.7 ex.cab SFI injection system

Hey there boatright33,

A few things things immediately come to mind.

There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.

When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.

I always put this one off until last. Check the injectors. Are they gummed up?

Let me know what you find out
Mike


Posted on Aug 12, 2008

honeymokey
  • 3113 Answers

SOURCE: 2003 BUICK REGAL TRANSMISSION PROBLEM.

This is a common problem on some GM cars. There is a pressure control valve in the side cover of the transmission that needs to be replaced. The transmission does not have to be rebuilt. You will need to get a side cover gasket also.

Posted on Apr 28, 2009

  • 1 Answer

SOURCE: engine shut down after 15miles then won't start for half hour

just went thru the same think wit a s 430 it was the crank position sensor . 60 bucks at auto zone and it took me 5min. 2 install if u need help feel free to call me 918 808 9706 chris

Posted on May 15, 2009

  • 6982 Answers

SOURCE: Lack of power when accelerating

You really should have a code check done. There are numerous items that can give you similar symptoms. Two places to look are the fuel filter (usually overlooked till they gum up, and the throttle position sensor (but test it first with an ohmeter. You will need a manual (vehicle specific ones are available at most larger parts stores and most of those stores also do code testing free)

Posted on May 27, 2009

  • 14036 Answers

SOURCE: Wont start, new fuel pump

replace fuse and relay.also check oil pressure switch.it controls fuel pump also. check fuel pump wires and fuel injector fuse .if all is good pcm could be faulty it controls fuel pump on .command circuit

Posted on May 31, 2009

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