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Will a exaust leak cause cause a sputter and poping out exaust and small flame at leak Engine runs smooth at idle no missfire or pop only flame and popping at acceleration help please car is a pontiac 3400

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You may get some popping with a leaking exhaust but not common. Sounds like you're in need of a tune up. Spark plugs and new wires to start. The flames are due to unburnt fuel from mostly a miss fire. Try a simple tune up first, also make sure you have a new air filter to help the motor breathe easier and save money at the pumps. Be sure to check and replace any old/cracked vacuum lines as this will cause poor performance too. Hope this helps start you in the right direction.

Posted on Apr 20, 2014

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Posted on Jan 02, 2017

SOURCE: Engine sputter

2002 linclon ls 3.0 v6 pcv location

Posted on Jul 17, 2008

66 chrgr
  • 1011 Answers

SOURCE: 2001 Hyundai XG-300 witn 86,000

i have run into this before. the mass air flow sensor is contaminaited take it out clean it with parts cleaner on the element first if this doe not fix it replace it. thank you

Posted on Jan 26, 2009

  • 1 Answer

SOURCE: 1994 camaro 3.4 v6. backfiring and poping through intake.

I had the same problem, thinking it was bad gas, or bad wires, or even a clogged fuel filter, had the engine checked out by a reputable gear head. A head bolt broke, then a intake lobe from cylinder #4 spun round thus causing your car to constantly backfire, also check to see if your head gaskets aren't blown (water-n-oil), all these were found once the engine was disassembled. Good luck trying to find a good used 3.4

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: 1992 Chevy S10 2.5L-4 cylinder.

My 1990 S10 pick-up had a similar problem too. It would start up fine (while the engine was cold) then once the engine warmed up it would idle very rough, sputter, and even stall out. My grandpa and I found what was wrong finally. The fuel distributor had been cracked, so when the engine warmed up it would miss (giving either too much or not enough fuel). So I recommend that you check that. Hope this helps.

Posted on Feb 17, 2011

  • 5 Answers

SOURCE: 1995 Maxima. Sputtering when accelerating, slight

IM A NISSAN TECH THE MOST COMMON PROBLEMS WITH THE 95 MAX IS IGNITION COILS OR A BAD MAS AIRFLOW METER CHECK DTC CODES BUT IF ITS JUST ON ACC ITS PROB A MASS AIR FLOW

Posted on May 16, 2011

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1 Answer

Idles smooth, sputters coming from muffler like its running on one cylinder


Hi T:
Interesting as smooth idle and sputter are contra-indications.
- Smooth idle should be healthy
- Sputter could indicate problem:
- mis-fire? Possible bad spark plug or bad exhaust valve. Pull spark plugs to check to see if any are fouled. Compression check will help depermine why fouling is happening.
How many cylinders?
How many Km on engine?
With engine hot, Remove oil filler cap and see if any vapour indicating blow by (bad rings)
My suggestion?
Do some more checking and reply as a comment on this post. Will assist if I can.
Cheers.

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Have the exaust system checked pluged up cat will act like that
The exaust cant get out so thats when it dies once the exaust bleads off it will start again

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Was running great then it just would not start and when it did it started idling fast now the exaust will glow red


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When the accelerator pedal is depressed, it can change things so that the engine seems to run smoothly.

However, I would look for codes to see if anything intermittent is occurring in the engine that may need attention.

The OBD-I scanner can help to diagnose the problem, if anything is out of specifications on the engine in question.

The owner will have to find a technician that has such a scanner.

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