Q: Rough idle and shaking.

asked by on December 26, 2016

Truck idles roughly when the cooling fan kicks on, rpms remain steady, if the engine is reved, rough idle goes away and doesnt come back for a while. This occured after the vehicle was taken across an exceptionally rough terrain.

My car has 74000 miles.
My car has an automatic transmission.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

All kinds of problems with the electronics
This problem could be related to the immobilizer function of the alarm system, or could be related to the engine or vehicle ground circuits. If the Check Engine Light is illuminated, a local mechanic with an advanced scan tool (like...
How do I open the trunk?
It is very easy to unlock the trunk. When the doors are unlocked, press the tailgate release button, and then lift the trunk up. Be sure to lift the trunk all the way open, or it may begin to close...
The car shudders in the front end, during braking at around 75 mph
Hello. If all of these parts have been replaced and the problem persists, then you either have a bent wheel hub or there is a worn out engine mount (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-engine-mount). Both of these will cause this. I usually check the...
After adding fuel additive, SUV performed badly
I would suggest checking the EGR valve (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-exhaust-gas-recirculation-egr-valve) (exhaust gas recycle). Inside your motor, temperatures can reach 2500 degrees. This is when the EGR valve is needed. When engine temperature is slightly cooler, such as when idling, the EGR valve...
Car cannot start, shifter showing second gear
Your symptoms seem to be similar to the situation where the linkage between the shifter handle and the transmission range selector may be loose or broken. In this event it may seem like the transmission range selections don't match up...
possible bad ecm if I reset it will that help me in finding out if its bad.
Hi there. From the description you provided, it is unlikely, the ECM (electronic control module) is at fault. First and most important, when disconnecting the battery, always disconnect the negative terminal first and reconnect last. Starting with the positive terminal,...
Car making loud noise and won't go
Hi there, The clanking noise you have described while turning, was most likely, the axle shaft cv joint making noise. Now, given the vehicle makes metal hitting noise, won't go when put into drive or reverse, and moves when in...
Car spotters when I engaged to drive and had a whisal sound
There is likely a problem in the fuel, ignition, or air induction systems. When you put the car in drive, you are "loading" the engine and obviously due to some fault the engine lacks sufficient power at that point to...
Battery light came on, overheated, coolant sprayed everywhere
The noise you were hearing may have been the serpentine belt breaking. Once the belt broke completely both the water pump and alternator stopped turning, thus accounting for both the overheating and the charging light coming on. It's possible you...

Related articles

2012 Chevrolet Equinox vs. 2012 GMC Terrain: Which One Should I Buy?
The mid-size crossover SUV category offers the comfort and size of an SUV, but on the platform of a car, giving it the look and feel of a large hatchback. The unibody construction typical of passenger vehicles is used instead...
The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have evaluated...
The Best Used Cars to Buy for Senior Citizens
Everyone Everyone needs a way to get around. You need to get groceries, get to doctors’ appointments, visit with family and more. However, senior citizens have very different needs when it comes to buying a used car than other demographics....