Q: Engine surges at idle two or three times and shuts off

asked by on October 25, 2016

i was having a misfiring problem, this was determined by a friend with a plug in reader, so we tried switching a coil to a different cyl. and no change. i changed the spark plugs now the engine runs great and very smooth. but now it will serge two or three times and shuts off, seems to only be happening at an idle and in gear. so we cleared the computer and tried it again this time it ran a farther distance, then the first time.and the engine light is back on again now my friend doesn't have any advice or cant pinpoint my problem. can you please help me

My car has 117000 miles.
My car has an automatic transmission.

Idle Control Valve Replacement $146.15 - $920.51 Get a Quote
Car idle is rough Inspection $79.99 - $89.99 Get a Quote

This may be a sign of an imbalanced air/fuel mixture caused by a failing idle air control valve. This is a unit that monitors air intake as it is mixed with fuel prior to being injected into the engine. When this reads inaccurate data in terms of the air coming in, this will cause inaccurate adjustments to be made causing the wrong air/fuel mixture to be supplied to the motor. When this happens, this can cause the engine to surge or fail to idle as you have experienced. I would recommend having an expert from YourMechanic come to your home to diagnose the abnormal idle and follow through with proper repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Why would my car not move in gear? 2002 Lincoln Continental

Hi - the first task is to check the transmission fluid level to make sure it has adequate and good condition fluid - proper level, red and clear (as opposed to dark and brown/black). If the fluid is dark and...

When I'm sitting in park my truck makes a loud bang sound

Depending on the sound and the location of the sound, this may be related to a misfire/backfiring problem. Engine backfire is caused by an imbalance in the air/fuel ratio being supplied to the motor and will occur in one of...

Fuel

Sounds like you have a clogged fuel filter or dirty injector ports. You may want to try putting a can of Seafoam in your gas tank and see if this will help clean your fuel system out. If you still...

Engine oil leak should I use Stop leak?

I would advise against putting stop-leak in your engine. If you have already done so, I recommend you change the oil right away. Many aftermarket manufacturers are selling products that look like a good answer to a complicated problem, but...

How I replace fuel filter

The fuel filter for your car is in the fuel tank. If you want to replace it, you will need to replace the fuel pump. It isn't regularly serviceable item anymore. As for the codes, the P0172 indicates there is...

Hello. My 2005 Dakota makes a loud thud about part of the time half way through braking and sometimes when accelerating.

Check your suspension on your front of the vehicle. It seems that the control arm bushings are worn or damaged and the bolts could be loose causing the suspension to move around when the vehicle is under a load. If...

I got my fixed but the car is still overheating and the heat not working and was leaking coolant

The lack of heat being generated by your system may indicate a clogged or leaking heater core. The heater core is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then...

Runs rough below 3000 rpms

This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, making turns (which makes use of the power steering pressure switch) turning on...

Wheels locked

Hello, from what you describe, I think you had one of the air springs in you suspension give out. Most Range Rovers have air suspension at all four corners. When one of the air springs leaks, the car will usually...

Related articles

How to Replace a Hatch Lock Cylinder
Replacing a hatch lock cylinder requires careful attention and only a few tools. You can complete the task in about an hour.
Symptoms of a Bad or Failing Valve Cover Gasket
Common signs of a faulty gasket include a burning oil smell, dirty valve cover, oil leaks, low engine oil, and a rough-running engine that misfires.
How Long Does a Clutch Master Cylinder Last?
The The clutch master cylinder is linked to the clutch slave cylinder through a series of hoses. Once you depress the clutch, brake fluid moves from the clutch master cylinder into the slave cylinder. This applies the necessary pressure to...