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Rough starting, won't idle, backfiring. - 2003 Mazda MPV

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The backfire is a result of excess fuel not firing in the engine. This could be a fouled plug or a bad coil pack. Basically the engine computer should be trying to compensate for this problem, so there should be a check engine light on. If no check engine light, then you would need to do a more in depth search. But I would start with a tune up.

Posted on Mar 13, 2011

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Posted on Jan 02, 2017

countrysi248
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SOURCE: rough idle, backfire on acceleration

check everything you can under the hood your air intake system all of it especially make sure all clamps are tight .. and make sure all vacuum hoses are good and not cracking or broken or just loose . you might run a little fuel cleaner through a tank of gas too cleaning the engine fuel system up some. just a few ideas.. Jerry

Posted on Apr 12, 2009

  • 10 Answers

SOURCE: Rough idle, sputtering, and backfiring.

try turning ur idle up its the pin on the throtle body just make sure u tuen the engine off and on again fter each adjustment to reset ur computer on ur engine

Posted on Apr 04, 2010

SOURCE: Ford F150 engine backfiring, running/idling rough

I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?

Posted on Oct 12, 2011

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1990 350 chevy in a itasca motorhome in park rough idle in drive it backfire in carb and dies often


could be timing problem , backfiring is a good indication of that .rough idle could be the egr valve plugged up .

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1 Answer

1988 2.8 s10 idles rough and backfires out tb. replaced ignition module and spark control unit, coil, plugs and wires. No help.


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change the fuel filter and check the fuel pressure

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Backfires and runs rough when letting up on gas.


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92 NISSAN WITH BOGGING AT 2800 3500 RPM AND AT LEVEL SPEED 4CYL AND 5 SPEED


For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

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

-----------
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------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

Had a question bout my mazda rx8 I was driving it one night it was running fine the next day went out and it won't turn over it takes awhile bit it finally starts and idles real rough and you give it...


Too many possibilities

Won't turn over is one problem -battery,cables,grounds,
starter,solenoid,etc

Idles rough-- vacuum leaks,spark plugs never replaced,
egr valve etc

Worn O2 Sensors
Dirty MAF Sensor
Old Fuel Filter

You have to go into a lot of technical detail & history
on your vehicle, for us to even guess.

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2 Answers

Ford F150 engine backfiring, running/idling rough


I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?

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1 Answer

Having rough idle and backfiring!


Still have a wire crossed somewhere. That is why you are getting the backfiring. Recheck firing order and make sure it is correct.

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1 Answer

Car idles rough and when u hit the throttle it starts to backfire


There is an Idle control sensor that has likely gone bad, take it to a trusted mechanic or dealer and have them replace it to solve the problem--roughly $300 repair at a Toyota dealer

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