Question about 1999 Chevrolet Blazer

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Backfires and stumbles when gas pedal is floored

Car backfires and stumbles when floored, cuts out at high rpm

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There are a lot of diffferent things possible, the backfiring is usually caused by a timing issue. Which could also cause some of your loss of power, but not always. Try checking your fuel pressure to see if there is a clog, also your timing is computer controlled so this means your timing chain is worn spark plugs and wires could be bad or you have a cracked distributor cap rotor bug bad, or even a bad distributor or even as simple as wrong ground placement for motor. Best choice is to start small and then work your way up. Also if disributor has ever been taken out then you will have to reset your oil pump drive because your distributor runs your oil pump with your cam-shaft.

Posted on Jan 03, 2013

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6ya6ya
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Posted on Jan 02, 2017

mrgreenz
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SOURCE: 1998 Cavalier 2.4 L stumbles and misses at 2000-2500 RPM

Vacuume Leaks can cause this problems. you have to do a through check of vacuum hoses and the EGR valve. Your best bet can be to have your vehicle scanned at an autozone store and get a code. The EGR has to be closed at idle, then as the engine warms up or is accelerated, the EGR opens. That is if your car does not have an electronic EGR . The electronic EGRs do not use vacuum to operate. They are controlled by the PCM (power train control Module).

Posted on Nov 20, 2008

SOURCE: 98 Cavalier 2.4L engine stumbles at 2000-2500 rpm

Could be a short in the wiring for the O2 sensor.   I currently have the same issue only my car finally threw a code after two days of it acting up.  Code 106.  Changed the MAP sensor and it now throws 108, MAP sensor high voltage circuit.  Ah the joys of cold weather and broke down vehicles.  But I know that you wont always get a code with a short.  Let me know if you fixed the problem.

Posted on Jan 08, 2009

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SOURCE: car turns over great will not start

IT DEFFO SOUNDS LIKE LACK OF FUEL, BUT FOR IT NOT TO RUN AT ALL UNLESS THROTTLE IS FULLY OPEN DOESN'T SOUND LIKE AN INJECTOR, MORE LIKE NO FUEL AT ALL, LIKE THE PUMP IS KNACKERED. PULL OUT AN INJECTOR, PUT IT IN A GLASS JAR, THEN TRY AND START IT, IT SHOULD GIVE A BIG POWERFUL SQUIRT OF FUEL, TRY ALL THE INJECTORS ONE AT A TIME, BECAUSE ITS QUITE RARE FOR ALL THE INJECTORS TO GO AT TE SAME TIME

Posted on Mar 15, 2009

  • 12 Answers

SOURCE: My 88 Beretta started making backfire noises and

Mass Airflow is probably defective and setting codes in the computer, have a shop run a diagnostic on it.

Posted on Aug 08, 2009

ronald_kate_
  • 111 Answers

SOURCE: idle is high unless I tap the gas pedal

To me this sounds like the return spring on the carby has lost its strengh or your carburator needs a good clean as the throtle linkages could be dirty. I hope this helps.

Posted on Nov 02, 2009

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My 94 nissan sentra doesn't run smooth over 3000 rpm or if you mash the gas pedal


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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
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------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

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1 Answer

Car stumbles, backfires until warm


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May 30, 2009 | 1993 Mercury Villager

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No acceleration at high RPM's


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May 16, 2009 | 1999 Pontiac Grand Am GT

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Car backfires hesitates when depressing gas pedal


Check the vacum lines going to the distributor and transmission. If they are leaking it could be your problem.

May 07, 2009 | 2003 Lincoln LS

1 Answer

98 Cavalier 2.4L engine stumbles at 2000-2500 rpm


Could be a short in the wiring for the O2 sensor.   I currently have the same issue only my car finally threw a code after two days of it acting up.  Code 106.  Changed the MAP sensor and it now throws 108, MAP sensor high voltage circuit.  Ah the joys of cold weather and broke down vehicles.  But I know that you wont always get a code with a short.  Let me know if you fixed the problem.

Oct 31, 2008 | 1998 Chevrolet Cavalier

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