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Engine misfires arounr 2000 to 4000rpm under acceleration. ihave tried new spark plugs & all connections seem ok

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Mr BrokRench
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SOURCE: Vibration below 4000rpm

Hello cloaky...does the vibration seem to be more RPM related than speed related on your gixxer? Can it be felt more through the grips, or foot pegs? Any noise along with the vibration?
The 99 GSX-R600 has been subject to recall for the replacement of it's faulty cam chain tensioner (NHTSA CAMPAIGN ID Number: 99V132000) Dealer supplied and installed at no charge under warranty... corrected the problem of cam chain tension but the damage of shorten chain life for most owners, had already occured. Didn't know if you were aware of this...so i thought i would mention it.
Hope this helps...

Posted on May 15, 2009

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SOURCE: Misfires when accelerating

check out your ignition system itdoes not advance

Posted on Aug 19, 2009

Testimonial: "I really do appreciate the info. I think my problem is above my knowledge so I will take it to the Harley agents. It was worthwile getting your advice"

  • 130 Answers

SOURCE: FJ1100 won't turn over when under compression.

Sounds like the starter sprag clutch on the flywheel is slipping.

Posted on Jul 29, 2010

Testimonial: "thank you I will look into that. How might you go about fixing that? I want to try and avoid taking the engine apart again if that is possible."

  • 1 Answer

SOURCE: Yamaha 2001 ttr 250. Bogs above half speed, under load

I have the same problems with my 1999 TTR 250, were you able to find out anything?

Walt
goalhawk@hotmail.com

Posted on Aug 07, 2010

heimlich
  • 1978 Answers

SOURCE: my 1999 honda shdow aero

Backfiring on deceleration is air getting into the exhaust and igniting unburned fuel. You probably have an after market exhaust on. You need to seal up the exhaust system by replacing all the exhaust gaskets. Dig the copper crush washers out of the head and replace them with new copper crush washers. This should take care of most of the popping. If the problem persists,unbolt the fuel cut diaphragms from the side of the carburetors and inspect them for holes and stickiness. Replace the fuel cut diaphragms if they are bad . Fuel cut diaphragms are on almost all Honda Kei Hin carburetors to stop the cycles from popping or backfiring on deceleration With the stock exhaust.

Posted on May 10, 2011

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2 Answers

My JD SX 320 misfires under load (one cylinder only)


plugs will not spark under compression if they are faulty or the HT lead id off too high a resistance. or mixture is incorrect
In the real old times when plugs were cleaned and tested one of the tests were to test spark in a dry compressed air chamber where if there was a problem they failed to spark
as you have fitted new plugs it comes back to the ht lead
they are carbon tracked lined internally, the connection for the plug and cap is just a steel pin shoved up into the carbon track
try using copper ht leads where the copper wire comes out to the connection
there could be a valve seating problem or weak valve springs on that cylinder that is not allowing proper seating under compression
if you have 2 carbies then the float level for that cylinder may be too low and under load starving for fuel

Jul 16, 2016 | Garden

1 Answer

Rav 4 misses under acceleration


well if engine is ok. No year, no engine stated, wow. !!!
misfire is bad combustion. (gas usa cars are my answers)
  1. never did a TUNEUP this decade? 60,000 miles tunes.?
  2. bad spark first.
  3. bad fueling next too rich causes misfire. lean bogs.
  4. misfire shakes engine hard, is it .
  5. does it misfire parked just racing engine?
  6. cause are many over 50, but if engine good way less, so what can it be (we do tests no Gue$$) bad spark plugs, leaking injectors execessive fuel pressure, bad TPS, sensor. map sensor issues, (even clogged) and others. no engine stated makes waxing smart, hard, way to hard so i quit here.

Feb 14, 2015 | Toyota RAV4 Cars & Trucks

1 Answer

Why is my car shaking


Short answer: If it quits shaking when you let off of the gas pedal, it is likely an engine misfire.

Long answer: I believe your model is new enough for the transmission to have a lock-up torque converter.
At around 40-45mph, the torque converter locks, making a solid connection between engine and transmission.
When this happens, any engine misfire is more readily felt throughout the car during acceleration.
The first items to check would be spark plugs, spark plug wires, and ignition coils. These are most likely to act up under load conditions such as acceleration.

On the other hand, if you let off of the gas pedal and the car still shakes, it is probably a tire or wheel problem.

Mar 15, 2014 | Cars & Trucks

1 Answer

While merging onto the highway when my car hit 3 and 4th gear the engine seemed to "stutter/misfire" during harder acceleration. Check engine light also flashed briefly during hard acceleration. Dur


Could be a transmission problem or something as simple as bad spark plugs.
The engine is under the most load when RPM is low and you are trying to accelerate, such as when it upshifts.
You should have the computer checked for trouble codes and hopefully that will point you in the right direction to test.
If the spark plugs have more than 50,000 miles of wear you might start with replacing them.

Feb 06, 2013 | 2008 Saturn Astra

1 Answer

99 mpv missfires,splutters.wont idle & has no power. when MAF is disconnected runs a lot better. I replaced the Maf but still does the same.The problem started suddenly,drove to work ok but when i


replace fuel filter, clean fuel injectors.could have bad fuel, do a code scan before buying new parts.faulty egr valve or faulty engine coolant temperature sensor cause engine run poorly.replace spark plugs and wires because if spark plug wires is bad or spark plug and ignition coil is bad that will cause rough idling misfiring and stalling you have dead cylinder not firing properly..

Oct 01, 2012 | Cars & Trucks

1 Answer

My engine misses when accelerating and when rpm exceeds 2,000. Check engine code was for cylinder #2 misfire. I replaced the sparkplug and wire on #2, #4, & #6 but, have not figured out how to


Maybe try waiting untill dark ,fire it up,open the hood (kill the hood light)
spray the plug wires with windex(not water) and look for sparks ,if any ,put a set of wires on it. I suppect this is the only problem,bad wires will kill coil packs

Jan 27, 2012 | Oldsmobile Cutlass Supreme Cars & Trucks

3 Answers

Misfire on cylinder 4 only when accelerating


Try a compression test. You could have a bent valve or a bad ring on the piston. If the compression test shows it to be much lower than the other cylinders then its a mechanical problem. The valve may not be seating or a weak spring isn't allowing the valves to close and its leaking under load.

Jul 13, 2009 | 2001 Ford Focus

1 Answer

2004 dodge caravan 2.4 Hesitates during Acceleration and at idele


You should definitely replace the fuel filter though this probably won't fix your hesitation. It wouldn't hurt to replace the spark plugs this is usually the culprit on these engine. I have the same engine in a '99 caravan and found the for some reason the spark plugs on cylinder 3 and 4 loosen up after one year and cause a misfire between 45 and 50 mph under load (when mildly accelerating).

Jan 06, 2009 | 2004 Dodge Caravan

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