Q: My car jerk's some times one week is good and the other week is bad.

asked by on March 11, 2017

My van works good in one week it acts up the next week it's back and forth
My car's transmission is unknown to me.

Engine is misfiring Inspection $79.99 - $89.99 Get a Quote

Either the EGR - Exhaust Gas Recirculation - has been plugged up or the MAF - Mass Air Flow - sensor is dirty or damaged. Try removing the vacuum line to the EGR and test driving the vehicle with the hose plugged up. If the symptoms change and make the jerking go away, then the EGR may be coming on when the engine is accelerating under a load forcing the engine to have a misfire condition. The MAF could also contribute to the symptoms of the same and cause the engine to have a misfire condition. If you need further assistance with your vehicle jerking on acceleration, then seek out a professional, such as one from Your Mechanic, to help you.

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

My 2007 Grand Caravan has hard detonation problems.

Hello. Engine detonation and power loss can be caused by a few different things. Keep in mind that engine detonation can quickly become a bigger issue if left unchecked, and in serious cases can even lead to engine damage. It...

Clutch noise

Without being able to hear the noise it will be hard to suggest a cause and repair. A common issue is the dust cover on the transmission. The noise will sound like a rattling and then go away once the...

Won't go into overdrive

Hi there. In most cases, this issue is caused by an obstruction of transmission fluid inside the hydraulic lines of the transmission. It can be resolved typically by flushing the transmission fluid and replacing the filter and transmission pan gasket....

How do I turn the rear park aid feature on or off?

The rear park aid is a safety feature that helps you when you are parking or are in a reverse situation. When in reverse it audibly alerts you of your surroundings, and how close you are to hitting other cars...

Crank no start

Hi there. The issue seems to have a misfire with the spark plugs and wires. The smoke that is coming out of the breather on the intake or valve covers is caused by the fuel burning on the exhaust stroke....

After shifting into drive, car lunged forward

It could just be that the transmission control electronics are faulty or that the Transmission Control Module (TCM) just needs an update. There is a Technical Service Bulletins (TSBs) regarding shift quality concerns for your vehicle. It's number LI27.00-P-051451 and...

Rough idle, possible misfire, bad oxygen sensor a possible cause

There are a number of things that can cause a misfire to be present, but a failing oxygen sensor is certainly one of them. As you know the oxygen sensor reads the exhaust gases and relays this information to the...

What services do I need? 1994 Ford Explorer

Hi - since the repair history, and the on-going brake problem symptoms seem a bit murky, I would recommend a brake system inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose...

windsheid wiper only works on fast speed

It is very likely that you are having an issue with your wiper switch as this is the part that controls the speed at which your wipers operate. I would recommend enlisting in the assistance of a quaified professional to...

Related articles

How Can Problems with the Ignition System Cause Misfiring?
Misfires Misfires are never good, and they're always a sign that there’s a problem with the engine that needs to be repaired. The problem won’t “go away on its own” and waiting too long can cause the situation to grow...
How Do Sensors Get Dirty or Damaged?
Car sensors measure and relay vital information to the ECU. Some sensors can get dirty from normal use, or fail if the car overheats or has a problem.
The Best Used Cars to Buy If You Have Kids
Once Once you have kids, the kind of car you have becomes very important. Suddenly, the amount of space, entertainment features, reliability, safety, and easy to clean interior become the top priorities. Here’s a list of vehicles meant to satisfy...