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MISFIRE / BACKFIRE AFTER CHANGING FUEL PUMP

CHANGED FUELM PUMP, NOW THE CAR HAS A MISFIRE AND IS BACKFIRING.

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  • Cars & Trucks Master
  • 5,648 Answers

Check plugs,wires,coils.

Posted on May 06, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

linktriscuit
  • 89 Answers

SOURCE: 1985 corvette no power to fuel pump

There's probably a relay that may control the fuel pump and the rst of the fuel system. I'd go to the local auto parts store and purchase a service manual, i believe it's only about twenty dollars. Good luck.

Posted on Nov 26, 2008

  • 1 Answer

SOURCE: Jeep GCL Backfires Stalls

Aaron, I had the same problem. It is the most expensive part of course the computer. I replaced everything as well till I replaced it. They are remanufactured and have had problems with them as well. I am on my third one now at 200k miles. Oh and by the way it does not show up on the diagnostic check. Good luck

Frank

Posted on Dec 01, 2008

  • 247 Answers

SOURCE: 1996 suburban random misfire or

i would check the fuel pressure first if it is in the good ranges then your pump is good. have you checked your spark plugs and wires? if not i would, if bad replace. otherwise i would have the ignition coils checked to find out if they are working correctly. that is all i can think of. good luck

Posted on Dec 16, 2008

hotrodtod38
  • 141 Answers

SOURCE: have 96 geo metro 1.0

wiring pcm or ecu

Posted on Feb 15, 2009

  • 14036 Answers

SOURCE: I have a 2004 F150 with 5.4, rough at idle and

bad fuel injectors or leaking intake.

Posted on May 05, 2009

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Why does my trx200sx backfire when I let off throttle it just started this


Dennis, Maybe try changing your plugs, unburnt fuel may be getting in exhaust because of weak plug.. Read the following links, very informative in telling causes of and some suggested fixes on backfiring. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
http://www.rcramer.com/shop/backfire.html

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WHAT WOULD THE PROBLEM BE IF YOUR CAR IS BACKFIRING AND MISSING?


Back fire can be caused by different faults.First is to much fuel because of worn carburetter, or wrong adjusments on carburetter. choke sticking will cause backfire. timing be out of adjustment will cause backfire exhaust leak can cause backfire. bad spark plugs, or plug leads , distributer cap worn of cracked will cause backfire as for fuel in muffler, if it combusted in muffler , the muffler would split open it is not that.

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Jeep GCL Backfires Stalls


Aaron, I had the same problem. It is the most expensive part of course the computer. I replaced everything as well till I replaced it. They are remanufactured and have had problems with them as well. I am on my third one now at 200k miles. Oh and by the way it does not show up on the diagnostic check. Good luck

Frank

Nov 30, 2008 | 1997 Jeep Grand Cherokee

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