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What causes motor to sputter or run rough

When moisture or rains alot ,engine doesn't want to idle right .up and down idling and back firing

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  • 373 Answers

I'd say you need to change your plugs and wires. If they get damp, or moist, they will arc and cause a miss. Also could be a bad coil, or coil pack. Will do the same thing. Im not sure what make or model or year your car is [ would be helpful] , but that's where I would start. If you let me know the make and year, I can probably help out a bit more

Posted on Jan 11, 2013

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Posted on Jan 02, 2017

TLFederline4
  • 12 Answers

SOURCE: sputtering and hesitating

Try replacing the PCV valve, and spray the carb, or throttlebody, with a good carb and choke cleaner.

Posted on Apr 10, 2009

MNfisherman
  • 11896 Answers

SOURCE: 99 escort sputters and stalls, engine bogs down in idle

The CAMshaft position sensor is faulty.

Posted on May 06, 2009

chrischronic
  • 235 Answers

SOURCE: 03 windstar rough idle working bad,worse in the rain

ford has a technical service bullitin out on this vehicle for the intake gaskets leaking causing a vacum leak that set codes 171 174. the solution is to have the intake manifold gaskets replaced . call your local ford dealer and see what thay can tell you about this bullitin.

Posted on May 07, 2009

  • 59 Answers

SOURCE: Car idles rough, stalls - 1982 Oldsmobile Cutlass Supreme

check for black smoke at exhaust. stuck choke.... clean with carb. cleaner. could need adjusted. possible stuck float. no quick fix. diry fuel filter. replace.

Posted on Jun 19, 2009

  • 750 Answers

SOURCE: Rough idle engine ticking

check for a lose spark plug lead or cracked elecrod insulation on spark plug

Posted on Jul 09, 2009

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1 Answer

Runs rough


Please tell me more. What is the size of your engine and did you ever remove front plastic cowl to reach your windsield wiper motor or to do some repair on the back of the engine?

Nov 10, 2013 | 2003 Ford Windstar

1 Answer

What causes motor to sputter or run rough


Assuming your truck is old enough to have a distributor cap and wires, either one could be shorting out when wet or damp.
You may need to replace the cap, rotor and wires to fix the problem.

Jan 11, 2013 | Chevrolet 1500 Cars & Trucks

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2009 focus idles rough when it rains or after going to car wash. The code indicates throttle body sensor, but mechanic says he doesn't think that is the problem.


I don't think it is either--- that is high & dry

Check the abs connector next to module or
something closer to the ground for water intrusion

Nov 29, 2012 | Cars & Trucks

1 Answer

Car shakes when idling'


Well this could be caused by a number of things. But the most common cause is an "engine miss." You could have 1 cylinder that has stopped firing. This will cause a very rough idle and very possibly shake or shudder whenever you accelerate. Another cause may be a main "vacuum hose could be disconnected" from it's port. Vacuum leaks cause engine shake at idle. Check for loose, cracked, or disconnected vacuum hoses under the hood. The third and least likely cause is a "broken or worn motor mount". If the engine is not securely held down in place by all the motor mounts, it will vibrate excessively and cause a shake at idle. The engine miss and motor mount problems are 2 issues best left to a professional to tackle. But as I said, you could tackle the vacuum leak issue yourself by checking under the hood. Hope this helps, good luck!

Sep 30, 2011 | 2000 Chevrolet Cavalier

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I have a 95 subaru impreza. when it is humid outside (raining/snow/etc.) the car sputters and stalls. it idles very rough for a few minutes then resumes to normal. what could br causing this? i have used...


Could be spark plug wires need replacing. Go out at night and start car in dark with hood raised. Look for little flashes or sparks. If nothing then try misting a little moisture from a spray bottle and see it you can't replicate the problem. I am assuming the moisture is causing the wires to arc and once the engine heats up it dries things out enough thatit runs okay

Feb 15, 2010 | 1998 Subaru Impreza

2 Answers

I have a problem with Ford Escape stalling or running rough @ idle everytime it rains. was told it could be catalytic converter.


LEAKING BAD SPARK WIRES OR YOUR COIL PACK GETTING DAMP.IF YOU HAVE 3.0L ENGINE. COIL PACK ON BACK OF ENGINE.IF YOUR LOWER COWL SEAL IS MISSING WATER CAN RUN DOWN THE COWL WHERE SEAL SUPPOSE TO BE CAUSING WATER TO RUN BACK OF ENGINE DAMPING YOUR COIL AND WIRES.BAD PLUG WIRES WILL CAUSE PROBLEM WHEN IT RAINS.

Jan 24, 2010 | 2002 Ford Escape

1 Answer

Rough idle then stalls


Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

Nov 02, 2009 | 1998 Chevrolet Malibu

1 Answer

93 cavalier vibrating


your probably feeling a rough idle of the engine. need a tune up?

in park the engine is not loaded down, just idling at a low rpm=rough
in drive with brake on you have put some load on motor also at low rpm=rough
in drive on the road engine is at higher rpm, = smoother

generally 4 cylinder motors idle a bit rough, especially if one spark plug is not firing right or fouled or one bad spark plug wire. tune up may fix it. if it is not stumbling real bad or stalling then you can live with it.

Nov 22, 2008 | 1999 Chevrolet Cavalier

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